My slides from "Inside PHP", a talk about how to change the syntax of the PHP programming language.
Modified PHP 5.4.4 source code (with the "until" keyword added during this presentation) is available here:
http://github.com/thomaslee/oscon2012-inside-php
The document discusses extending the PHP Development Toolkit (PDT) in Eclipse. It provides examples of how to extend PDT by registering build participants and AST visitors to integrate validation rules. Quick fixes can also be added to automatically fix problems. The document recommends using Eclipse's JavaScript support to dynamically extend PDT through scripting instead of Java for PHP developers. This allows customizing PDT distributions and potentially writing PHP plugins in PHP.
My slides from "Inside Python", a talk about how to change the syntax of the Python programming language.
Modified Python 3.2 source code (with the "unless" keyword added during this presentation) is available here:
http://github.com/thomaslee/oscon2012-inside-python
This document summarizes new features in Java SE 7 and Java EE 6. For Java SE 7, it outlines language changes like annotations on types and Project Coin small changes, as well as core changes like modularity support and concurrency updates. It describes VM changes like compressed pointers and garbage collection improvements. For Java EE 6, it discusses goals like rightsizing and extensibility, and new technologies like CDI and Bean Validation. It provides overviews of updated technologies and how profiles target specific capabilities.
This document provides a cheat sheet for using the GNU Debugger (GDB). It lists GDB commands for running and attaching to programs, setting breakpoints and watchpoints, examining the call stack and variables, stepping through code, and getting information about loaded libraries, signals, and threads. The cheat sheet also describes format specifiers and expressions that can be used with commands like print to examine memory and variables.
Python Compiler Internals Presentation SlidesTom Lee
The document discusses implementing a new "unless" statement in the Python compiler. It covers modifying the grammar, changing the AST definition, and generating bytecode for the new statement. Key parts of the compiler like the tokenizer, parser, AST translation, and bytecode generation are affected. Sample code is shown for how "unless" would work similarly to "if not". The presentation encourages exploring compiler internals and not being afraid to ask questions.
Have Your Cake and Eat It Too: Meta-Programming Techniques for JavaHoward Lewis Ship
The document discusses meta-programming in Java using bytecode manipulation libraries like ASM. It describes how ASM works by allowing the reading, modification, and writing of Java bytecode. This enables dynamically rewriting classes by adding, removing, or modifying fields and methods at runtime. The document provides an example of using ASM to add a private field to a class. It also discusses how meta-programming techniques can be used to implement features like aspect-oriented programming and dynamic proxies in Java.
My slides from "Inside PHP", a talk about how to change the syntax of the PHP programming language.
Modified PHP 5.4.4 source code (with the "until" keyword added during this presentation) is available here:
http://github.com/thomaslee/oscon2012-inside-php
The document discusses extending the PHP Development Toolkit (PDT) in Eclipse. It provides examples of how to extend PDT by registering build participants and AST visitors to integrate validation rules. Quick fixes can also be added to automatically fix problems. The document recommends using Eclipse's JavaScript support to dynamically extend PDT through scripting instead of Java for PHP developers. This allows customizing PDT distributions and potentially writing PHP plugins in PHP.
My slides from "Inside Python", a talk about how to change the syntax of the Python programming language.
Modified Python 3.2 source code (with the "unless" keyword added during this presentation) is available here:
http://github.com/thomaslee/oscon2012-inside-python
This document summarizes new features in Java SE 7 and Java EE 6. For Java SE 7, it outlines language changes like annotations on types and Project Coin small changes, as well as core changes like modularity support and concurrency updates. It describes VM changes like compressed pointers and garbage collection improvements. For Java EE 6, it discusses goals like rightsizing and extensibility, and new technologies like CDI and Bean Validation. It provides overviews of updated technologies and how profiles target specific capabilities.
This document provides a cheat sheet for using the GNU Debugger (GDB). It lists GDB commands for running and attaching to programs, setting breakpoints and watchpoints, examining the call stack and variables, stepping through code, and getting information about loaded libraries, signals, and threads. The cheat sheet also describes format specifiers and expressions that can be used with commands like print to examine memory and variables.
Python Compiler Internals Presentation SlidesTom Lee
The document discusses implementing a new "unless" statement in the Python compiler. It covers modifying the grammar, changing the AST definition, and generating bytecode for the new statement. Key parts of the compiler like the tokenizer, parser, AST translation, and bytecode generation are affected. Sample code is shown for how "unless" would work similarly to "if not". The presentation encourages exploring compiler internals and not being afraid to ask questions.
Have Your Cake and Eat It Too: Meta-Programming Techniques for JavaHoward Lewis Ship
The document discusses meta-programming in Java using bytecode manipulation libraries like ASM. It describes how ASM works by allowing the reading, modification, and writing of Java bytecode. This enables dynamically rewriting classes by adding, removing, or modifying fields and methods at runtime. The document provides an example of using ASM to add a private field to a class. It also discusses how meta-programming techniques can be used to implement features like aspect-oriented programming and dynamic proxies in Java.
Smalltalk implementation of EXIL, a Component-based Programming LanguageESUG
1) The document discusses a Smalltalk implementation of Exil, a component-based programming language that combines modeling and programming languages.
2) Exil extends Scl, a simple component-oriented language, to support modeling with explicit architectures, inheritance of descriptors, ports, services, and internal components/connections.
3) Component-based programming separates concerns into black box components with explicit external contracts through provided and required ports and services.
The document provides a quick reference guide for Java programming including:
1) The basic syntax for a Java application with a main method.
2) How to compile and run a Java program from the command line.
3) An overview of Java primitive data types, comments, and reserved words.
4) Descriptions of common Java programming concepts like classes, arrays, and flow control statements.
This document discusses method handles and lambda expressions in Java 8. It explains that method handles are references to methods that can be executed and are obtained through reflection. Method handles improve on reflection by caching access at lookup rather than invocation time. Lambda expressions allow anonymous blocks of code and are implemented using invokedynamic and method handles. When the compiler encounters a lambda expression, it is "desugared" into a private method and an invokedynamic instruction generates an instance of a functional interface to reference the lambda expression.
PyCon UK 2008: Challenges for Dynamic LanguagesTed Leung
The document compares different dynamic programming languages and frameworks. It lists the popularity of languages like PHP, Python, Perl, JavaScript, Ruby and also mentions frameworks like Django and J2EE. It discusses challenges in using dynamic languages and compares them to other languages like Haskell, Erlang, Lisp for different applications.
This document provides a summary of basic Java concepts including data types, operators, flow control statements, comments, and some key Java packages. It lists common Java operators like arithmetic, relational, logical, and bitwise operators. It also summarizes common statements for flow control including if/else, while, do-while, and for loops. Additionally, it shows how to declare variables, arrays, and classes in Java.
A(n abridged) tour of the Rust compiler [PDX-Rust March 2014]Tom Lee
The document provides an overview of the major stages in Rust's compiler:
1) Scanning converts source code to tokens. Rust's scanner is in libsyntax/parse/lexer.rs.
2) Parsing converts tokens to an AST using grammar rules. Rust's parser is in libsyntax/parse/parser.rs and outputs an AST in libsyntax/ast.rs.
3) Semantic analysis applies Rust's rules through name resolution, type checking, borrow checking etc. This is handled by librustc/middle/*.rs.
4) Code generation translates the AST to LLVM IR. Rust uses librustc/middle/trans/base.rs and writes output with
HES2011 - James Oakley and Sergey bratus-Exploiting-the-Hard-Working-DWARFHackito Ergo Sum
The document describes how DWARF bytecode, included in GCC-compiled binaries to support exception handling, can be exploited to insert trojan payloads. DWARF bytecode interpreters are included in the standard C++ runtime and are Turing-complete, allowing the bytecode to perform arbitrary computations by influencing program flow. A demonstration shows how DWARF bytecode can be used to hijack exceptions and execute malicious payloads without requiring native code.
The document discusses various C preprocessor directives and storage classes in C.
1. It defines storage class specifier and mentions the different types of storage classes - auto, extern, static, and register. It distinguishes between auto and register storage classes.
2. It explains what extern storage class means and provides an example. It identifies the storage class of a variable defined within a code block.
3. It discusses various preprocessor directives like #define, #undef, #if, #else, #include and explains their usage with examples.
This document provides an overview of OpenMP, a programming model for parallel programming on shared memory architectures. It discusses key OpenMP concepts like parallel regions, data sharing attributes, worksharing constructs like parallel for loops and sections, tasks, and synchronization. The document outlines an agenda and provides examples to illustrate OpenMP directives and clauses for parallelizing loops and sections of code.
Mixing Source and Bytecode: A Case for Compilation By Normalization (OOPSLA 2...lennartkats
Language extensions increase programmer productivity by providing concise, often domain-specific syntax, and support for static verification of correctness, security, and style constraints. Language extensions can often be realized through translation to the base language, supported by preprocessors and extensible compilers. However, various kinds of extensions require further adaptation of a base compiler's internal stages and components, for example to support separate compilation or to make use of low-level primitives of the platform (e.g., jump instructions or unbalanced synchronization). To allow for a more loosely coupled approach, we propose an open compiler model based on normalization steps from a high-level language to a subset of it, the core language. We developed such a compiler for a mixed Java and (core) bytecode language, and evaluate its effectiveness for composition mechanisms such as traits, as well as statement-level and expression-level language extensions.
Strategies to improve embedded Linux application performance beyond ordinary ...André Oriani
he common recipe for performance improvement is to profile an application, identify the most time-consuming routines, and finally select them for optimization. Sometimes that is not enough. Developers may have to look inside the OS searching for performance improvement opportunities. Or they might need to optimize code inside a third party library they do not have access to. For those cases, other strategies shall be used. This presentation reports the experiences of Motorola's Brazilian developers reducing the startup time of an application on Motorola's MOTOMAGX embedded Linux platform. Most of the optimization was performed in the binary loading stage, prior to the execution of the entry point function. This endeavor required use of Linux ABI and Linux Loader going beyond typical bottleneck searching. The presentation will cover prelink, dynamic library loading, tuning of shared objects, and enhancing user experience. A live demo will show the use of prelink and other tools to improve performance of general Linux platforms when libraries are used.
The document summarizes the key new features introduced in each version of Java from JDK 1.0 to Java SE 8. Some major enhancements included strings in switch statements in Java 7, binary and underscore literals, multi-catch exceptions, try-with-resources for automatic resource management, and lambda expressions in Java 8.
The document discusses various C preprocessor directives and storage classes. It defines storage class specifier as used to define storage location, scope, lifetime and default value of a variable. The main storage classes are auto, extern, static, and register. It also discusses preprocessor directives like #define, #include, #if etc and provides examples of conditional compilation using #if,#else,#elif. Macro is defined as a way to create symbols or functions that are substituted before compilation. Advantages of macro over functions are also mentioned.
Using Stratego/XT for generation of software connectors.Michal Malohlava
This document discusses using Stratego/XT to generate software connectors. It proposes designing a domain specific language called ElLang-J, which is a mixture of ElLang and Java, to define templates for connector element implementations. The templates would be evaluated using Stratego/XT to generate Java source code for the connectors. The solution involves a Java part to prepare low-level connector configuration and a Stratego part to generate code from the templates and configuration. Evaluation finds advantages in the extensible templates but also disadvantages in Stratego/XT being C-based while the rest of the generator is Java.
This document provides a quick introduction to the C programming language. It discusses basic C syntax like main functions, header files, comments, and variables. It also covers data types, memory, functions, scopes, expressions, control flow statements like if/else and loops. Functions can access arguments and global variables from their own scope but not variables from outer scopes unless passing their addresses.
This document summarizes a presentation about a new way of developing Perl applications and the future of gperl, a fast Perl-like language. It discusses compiler modules for lexical analysis, parsing, and code generation that were originally developed for gperl and can now be used to build various tools and applications. These include a transpiler to run Perl 5 code in web browsers, a framework called PerlMotion for building iOS and OSX apps with Perl, and a static analysis tool for detecting copied code. The presentation encourages contributions to related open source projects and outlines plans to expand the capabilities of the static analysis and type inference engines.
At a previous JRubyConf, we talked about Thnad, a fictional programming language. Thnad served as a vehicle to explore the joy of building a compiler using JRuby, BiteScript, Parslet, and other tools. Now, Thnad is back with a second runtime: Rubinius. Come see the Rubinius environment through JRuby eyes. Together, we'll see how to grapple with multiple instruction sets and juggle contexts without going cross-eyed.
The EventView framework provides a modular approach to physics analysis using common event objects. It defines an EventView (EV) container to hold the objects and information needed for analysis. Various tools operate on the EventView to perform tasks like object calibration, reconstruction, and calculation of event variables. Tools are independent modules that build up the EventView incrementally. An EVToolLooper schedules the tools and propagates the analysis information through the EventView. This framework aims to divide analysis into reusable and generalizable components.
This document provides an overview of the Standard PHP Library (SPL) including common data structures, interfaces, exceptions and iterators. It discusses how SPL components like SplAutoload, SplFileInfo and various iterators are used in popular open source projects. The document encourages developers to get involved in improving SPL through code contributions and articles and provides contact information for the presenter.
Smalltalk implementation of EXIL, a Component-based Programming LanguageESUG
1) The document discusses a Smalltalk implementation of Exil, a component-based programming language that combines modeling and programming languages.
2) Exil extends Scl, a simple component-oriented language, to support modeling with explicit architectures, inheritance of descriptors, ports, services, and internal components/connections.
3) Component-based programming separates concerns into black box components with explicit external contracts through provided and required ports and services.
The document provides a quick reference guide for Java programming including:
1) The basic syntax for a Java application with a main method.
2) How to compile and run a Java program from the command line.
3) An overview of Java primitive data types, comments, and reserved words.
4) Descriptions of common Java programming concepts like classes, arrays, and flow control statements.
This document discusses method handles and lambda expressions in Java 8. It explains that method handles are references to methods that can be executed and are obtained through reflection. Method handles improve on reflection by caching access at lookup rather than invocation time. Lambda expressions allow anonymous blocks of code and are implemented using invokedynamic and method handles. When the compiler encounters a lambda expression, it is "desugared" into a private method and an invokedynamic instruction generates an instance of a functional interface to reference the lambda expression.
PyCon UK 2008: Challenges for Dynamic LanguagesTed Leung
The document compares different dynamic programming languages and frameworks. It lists the popularity of languages like PHP, Python, Perl, JavaScript, Ruby and also mentions frameworks like Django and J2EE. It discusses challenges in using dynamic languages and compares them to other languages like Haskell, Erlang, Lisp for different applications.
This document provides a summary of basic Java concepts including data types, operators, flow control statements, comments, and some key Java packages. It lists common Java operators like arithmetic, relational, logical, and bitwise operators. It also summarizes common statements for flow control including if/else, while, do-while, and for loops. Additionally, it shows how to declare variables, arrays, and classes in Java.
A(n abridged) tour of the Rust compiler [PDX-Rust March 2014]Tom Lee
The document provides an overview of the major stages in Rust's compiler:
1) Scanning converts source code to tokens. Rust's scanner is in libsyntax/parse/lexer.rs.
2) Parsing converts tokens to an AST using grammar rules. Rust's parser is in libsyntax/parse/parser.rs and outputs an AST in libsyntax/ast.rs.
3) Semantic analysis applies Rust's rules through name resolution, type checking, borrow checking etc. This is handled by librustc/middle/*.rs.
4) Code generation translates the AST to LLVM IR. Rust uses librustc/middle/trans/base.rs and writes output with
HES2011 - James Oakley and Sergey bratus-Exploiting-the-Hard-Working-DWARFHackito Ergo Sum
The document describes how DWARF bytecode, included in GCC-compiled binaries to support exception handling, can be exploited to insert trojan payloads. DWARF bytecode interpreters are included in the standard C++ runtime and are Turing-complete, allowing the bytecode to perform arbitrary computations by influencing program flow. A demonstration shows how DWARF bytecode can be used to hijack exceptions and execute malicious payloads without requiring native code.
The document discusses various C preprocessor directives and storage classes in C.
1. It defines storage class specifier and mentions the different types of storage classes - auto, extern, static, and register. It distinguishes between auto and register storage classes.
2. It explains what extern storage class means and provides an example. It identifies the storage class of a variable defined within a code block.
3. It discusses various preprocessor directives like #define, #undef, #if, #else, #include and explains their usage with examples.
This document provides an overview of OpenMP, a programming model for parallel programming on shared memory architectures. It discusses key OpenMP concepts like parallel regions, data sharing attributes, worksharing constructs like parallel for loops and sections, tasks, and synchronization. The document outlines an agenda and provides examples to illustrate OpenMP directives and clauses for parallelizing loops and sections of code.
Mixing Source and Bytecode: A Case for Compilation By Normalization (OOPSLA 2...lennartkats
Language extensions increase programmer productivity by providing concise, often domain-specific syntax, and support for static verification of correctness, security, and style constraints. Language extensions can often be realized through translation to the base language, supported by preprocessors and extensible compilers. However, various kinds of extensions require further adaptation of a base compiler's internal stages and components, for example to support separate compilation or to make use of low-level primitives of the platform (e.g., jump instructions or unbalanced synchronization). To allow for a more loosely coupled approach, we propose an open compiler model based on normalization steps from a high-level language to a subset of it, the core language. We developed such a compiler for a mixed Java and (core) bytecode language, and evaluate its effectiveness for composition mechanisms such as traits, as well as statement-level and expression-level language extensions.
Strategies to improve embedded Linux application performance beyond ordinary ...André Oriani
he common recipe for performance improvement is to profile an application, identify the most time-consuming routines, and finally select them for optimization. Sometimes that is not enough. Developers may have to look inside the OS searching for performance improvement opportunities. Or they might need to optimize code inside a third party library they do not have access to. For those cases, other strategies shall be used. This presentation reports the experiences of Motorola's Brazilian developers reducing the startup time of an application on Motorola's MOTOMAGX embedded Linux platform. Most of the optimization was performed in the binary loading stage, prior to the execution of the entry point function. This endeavor required use of Linux ABI and Linux Loader going beyond typical bottleneck searching. The presentation will cover prelink, dynamic library loading, tuning of shared objects, and enhancing user experience. A live demo will show the use of prelink and other tools to improve performance of general Linux platforms when libraries are used.
The document summarizes the key new features introduced in each version of Java from JDK 1.0 to Java SE 8. Some major enhancements included strings in switch statements in Java 7, binary and underscore literals, multi-catch exceptions, try-with-resources for automatic resource management, and lambda expressions in Java 8.
The document discusses various C preprocessor directives and storage classes. It defines storage class specifier as used to define storage location, scope, lifetime and default value of a variable. The main storage classes are auto, extern, static, and register. It also discusses preprocessor directives like #define, #include, #if etc and provides examples of conditional compilation using #if,#else,#elif. Macro is defined as a way to create symbols or functions that are substituted before compilation. Advantages of macro over functions are also mentioned.
Using Stratego/XT for generation of software connectors.Michal Malohlava
This document discusses using Stratego/XT to generate software connectors. It proposes designing a domain specific language called ElLang-J, which is a mixture of ElLang and Java, to define templates for connector element implementations. The templates would be evaluated using Stratego/XT to generate Java source code for the connectors. The solution involves a Java part to prepare low-level connector configuration and a Stratego part to generate code from the templates and configuration. Evaluation finds advantages in the extensible templates but also disadvantages in Stratego/XT being C-based while the rest of the generator is Java.
This document provides a quick introduction to the C programming language. It discusses basic C syntax like main functions, header files, comments, and variables. It also covers data types, memory, functions, scopes, expressions, control flow statements like if/else and loops. Functions can access arguments and global variables from their own scope but not variables from outer scopes unless passing their addresses.
This document summarizes a presentation about a new way of developing Perl applications and the future of gperl, a fast Perl-like language. It discusses compiler modules for lexical analysis, parsing, and code generation that were originally developed for gperl and can now be used to build various tools and applications. These include a transpiler to run Perl 5 code in web browsers, a framework called PerlMotion for building iOS and OSX apps with Perl, and a static analysis tool for detecting copied code. The presentation encourages contributions to related open source projects and outlines plans to expand the capabilities of the static analysis and type inference engines.
At a previous JRubyConf, we talked about Thnad, a fictional programming language. Thnad served as a vehicle to explore the joy of building a compiler using JRuby, BiteScript, Parslet, and other tools. Now, Thnad is back with a second runtime: Rubinius. Come see the Rubinius environment through JRuby eyes. Together, we'll see how to grapple with multiple instruction sets and juggle contexts without going cross-eyed.
The EventView framework provides a modular approach to physics analysis using common event objects. It defines an EventView (EV) container to hold the objects and information needed for analysis. Various tools operate on the EventView to perform tasks like object calibration, reconstruction, and calculation of event variables. Tools are independent modules that build up the EventView incrementally. An EVToolLooper schedules the tools and propagates the analysis information through the EventView. This framework aims to divide analysis into reusable and generalizable components.
This document provides an overview of the Standard PHP Library (SPL) including common data structures, interfaces, exceptions and iterators. It discusses how SPL components like SplAutoload, SplFileInfo and various iterators are used in popular open source projects. The document encourages developers to get involved in improving SPL through code contributions and articles and provides contact information for the presenter.
This document provides an overview of the Standard PHP Library (SPL) including common data structures like stacks, queues, heaps and iterators. It discusses how SPL extensions like SplSubject and SplObserver can be used to implement observer patterns. Various real-world open source projects using SPL are cited as examples. The document encourages involvement in improving and expanding SPL through code contributions and community engagement.
Even though this is a trivial example, the advantages of Python stand out.
Yorktown’s Computer Science I course has no prerequisites, so many of the
students seeing this example are looking at their first program. Some of them
are undoubtedly a little nervous, having heard that computer programming is
difficult to learn. The C++ version has always forced me to choose between
two unsatisfying options: either to explain the #include, void main(), {, and
} statements and risk confusing or intimidating some of the students right at
the start, or to tell them, “Just don’t worry about all of that stuff now; we will
talk about it later,” and risk the same thing. The educational objectives at
this point in the course are to introduce students to the idea of a programming
statement and to get them to write their first program, thereby introducing
them to the programming environment. The Python program has exactly what
is needed to do these things, and nothing more.
Comparing the explanatory text of the program in each version of the book
further illustrates what this means to the beginning student. There are thirteen
paragraphs of explanation of “Hello, world!” in the C++ version; in the Python
version, there are only two. More importantly, the missing eleven paragraphs
do not deal with the “big ideas” in computer programming but with the minutia
of C++ syntax. I found this same thing happening throughout the book.
Whole paragraphs simply disappear from the Python version of the text because
Python’s much clearer syntax renders them unnecessary.
Using a very high-level language like Python allows a teacher to postpone talking
about low-level details of the machine until students have the background that
they need to better make sense of the details. It thus creates the ability to put
“first things first” pedagogically. One of the best examples of this is the way in
which Python handles variables. In C++ a variable is a name for a place that
holds a thing. Variables have to be declared with types at least in part because
the size of the place to which they refer needs to be predetermined. Thus, the
idea of a variable is bound up with the hardware of the machine. The powerful
and fundamental concept of a variable is already difficult enough for beginning
students (in both computer science and algebra). Bytes and addresses do not
help the matter. In Python a variable is a name that refers to a thing. This
is a far more intuitive concept for beginning students and is much closer to the
meaning of “variable” that they learned in their math courses. I had much less
difficulty teaching variables this year than I did in the past, and I spent less
time helping students with problems using them.
The document discusses the Standard PHP Library (SPL) which provides common data structures and interfaces in PHP. It describes various iterator interfaces and classes that can be used to iterate over data in a consistent manner. These include interfaces like Iterator and classes like RecursiveIteratorIterator, FilterIterator, ArrayIterator, DirectoryIterator, and SplFileInfo. It also discusses other SPL components like exceptions, autoloading functions, and data structures.
This document provides reference information for PHP functions suitable for beginner to intermediate PHP programmers. It includes an introduction, overview of assumptions made, and formatting used for describing each function. Functions are grouped into categories like string functions, array functions, date/time functions, and more. Sample code and output is provided for each function described.
<b>PHP</b> Reference: Beginner to Intermediate <b>PHP5</b>tutorialsruby
This document is a reference book for PHP functions aimed at beginner to intermediate PHP programmers. It provides concise descriptions, examples, and related functions for common PHP functions. The book assumes some PHP experience and focuses on the essential information for each function rather than extensive tutorials. It excludes more advanced PHP topics like object-oriented programming.
The document discusses various aspects of the Clojure implementation including the compiler, runtime, and other core components. It begins with an overview of important Clojure milestones from its initial commit in 2006 to becoming 1.0 in 2009. It then discusses the reader, analyzer, emitter, evaluator, and compiler components involved in processing Clojure code. Key classes and methods like RT, Compiler, LispReader, and FnExpr are explained in detail. It also notes performance optimizations that could be made, such as caching in the HostExpr class.
The document provides an overview of key Java concepts including classes, objects, variables, methods, encapsulation, inheritance, polymorphism, constructors, memory management, exceptions, I/O streams, threads, collections, serialization and more. It also includes examples of practical applications and code snippets to demonstrate various Java features.
This document provides a summary of the differences between the syntax and functions of SCILAB and MATLAB. It notes that while SCILAB and MATLAB functions are often similar, there are some key differences in how functions are defined, variables are used, strings are handled, and empty matrices are operated on. It also provides a table comparing common functions between the two platforms and lists some SCILAB functions that are designed to emulate MATLAB functions. The document is intended to help users familiar with MATLAB transition to using SCILAB.
This document discusses approaches to managing architecture in Java and Spring applications. It recommends starting with a strict packages model organized by slices and layers, then using tools like Sonar to analyze dependencies and enforce architecture. It also introduces Hera, a small plugin system that allows selecting plugins based on criteria and callbacks. Hera provides a registry and common access patterns to integrate plugins dynamically.
The document discusses iterators in PHP. It begins by explaining what an iterator is and provides examples of using iterators to loop through arrays and files. It then discusses the benefits of using iterators over plain arrays, such as improved readability, ability to enforce structure, and better memory efficiency. The document also covers implementing iterators by having classes implement the Iterator interface and explains the different types of iterables in PHP like arrays, iterators, generators, and iterator aggregates.
This document provides an overview of PHP extensions, including reasons for creating extensions, the extension development process, and advanced extension topics. Some key points:
- Extensions allow PHP to interface with C/C++ libraries, modify how the PHP engine works, and increase performance of slow code.
- The extension development process includes setting up the compile environment, writing the module definition, adding functions, and testing.
- Advanced topics include using global variables, custom object handling, memory management, and threading safety. Well-documented extensions can be proposed for inclusion in the PECL repository.
The document discusses Django's templating system. It provides an example base template with blocks for title, menu, content, and copyright. It then shows how child templates can extend the base template and override or add content to its blocks. The templating system allows for compartmentalization and reuse of common elements across templates.
The document provides a quick introduction to the Perl scripting language. It discusses variables including scalars, arrays, hashes, and references. It also covers basic concepts like conditionals, subroutines, string manipulation, modules/packages, object-oriented programming, and debugging in Perl. The goal is to enable readers to quickly learn Perl fundamentals and become proficient at writing simple programs.
The document provides a quick introduction to the Perl scripting language. It discusses variables including scalars, arrays, hashes, and references. It also covers basic concepts like conditionals, subroutines, string manipulation, modules/packages, object-oriented programming, and debugging in Perl. The goal is to enable readers to quickly learn Perl fundamentals and become proficient at writing simple programs.
The document provides information about various Python concepts like PEP 8, pickling, lambda functions, generators, modules, packages and more. It also includes questions about memory management in Python, tools for static analysis, decorators, iterators, slicing, and other common Python interview questions.
Lambdas and Streams in Java SE 8: Making Bulk Operations simple - Simon RitterJAXLondon2014
This document provides an overview of lambdas and streams in Java 8. It discusses how lambdas allow for more functional-style programming by supporting anonymous functions. Streams provide a way to perform aggregate operations on collections in a declarative way, using internal iteration with lambdas rather than external iteration. Key aspects covered include lambda expression syntax and type inference, method and constructor references, default and static methods in interfaces, and functional interfaces.
This document provides an overview of lambdas and streams in Java 8. It discusses how lambdas allow for more functional-style programming by supporting anonymous functions. Streams provide a way to perform aggregate operations on collections in a declarative way, using internal iteration with lambdas rather than external iteration. Key aspects covered include lambda expression syntax and type inference, method and constructor references, default and static methods in interfaces, and functional interfaces.
Similar to An Introduction to SPL, the Standard PHP Library (20)
AtlasCamp 2016: Art of PaaS - Lessons learned running a platform for hundreds...Robin Fernandes
Presented at AtlasCamp 2016. Recording: https://youtu.be/dc2nqzgqH24?list=PLaD4FvsFdarSqTPKnsNqrnk2ZRuuhLtYE
Connect has taken you on a journey to SaaS. Over the past few years, you've learned how running a service is deeply different from building a plugin. You've discovered tips, tricks and patterns to evolve your service while keeping it running 24/7. Now, you're managing not just one service, but a multitude – and perhaps you're wondering what needs to change as you head towards dozens or even hundreds of services.
At Atlassian, we've taken on this challenge with Micros, our internal Platform as a Service that helps developers across Atlassian easily deploy and run microservices in AWS. Running this platform involves constant decisions to strike the right balance between stability, progress, governance and flexibility. We'll tell you the lessons we've learned – both technical and non-technical – walking these tightropes.
AtlasCamp 2014: Building a Production Ready Connect Add-OnRobin Fernandes
Atlassian Connect add-ons are SaaS applications. Building and running them means planning with operations in mind: where should you host your add-on? What's the best way to deploy it? How can you monitor it once it's live? How much will it cost to run? We'll draw from Atlassian's experiences building Who's Looking for OnDemand (a production Connect add-on installed in 950 instances with 20,000 active users) to explore tips and best practices to help answer these questions and more.
The document discusses Satellite Apps, which allow integrating systems with JIRA Studio using remote APIs. Satellite Apps can be used for reporting, integration, and automation scenarios. Examples provided include using APIs to access issue details, create and modify pages, and automatically replace text in pages.
Custom Detectors for FindBugs (London Java Community Unconference 2)Robin Fernandes
Slides for presentation / demo for a basic introduction to writing custom detectors for FindBugs.
Talk was given at the London Java Community Unconference 2, 26th June 2010.
The example code that goes with the slides is here:
http://bit.ly/fb_demo.
Php On Java (London Java Community Unconference)Robin Fernandes
PHP code can run on the Java Virtual Machine using implementations like P8 that compile PHP to Java bytecode. This allows PHP applications to leverage Java libraries and PHP scripts to be used in Java applications and middleware products from IBM like WebSphere and Message Broker. Some challenges of PHP on JVM include differences in strings and limitations of PHP class formats, but it provides benefits like a more modern runtime and ability to integrate PHP and Java code.
PHP can run on the Java Virtual Machine (JVM) using implementations like P8 that compile PHP code to Java bytecode. This allows PHP applications to leverage Java libraries and Java applications to leverage PHP scripting. Integrating PHP and Java can provide benefits like allowing PHP developers to use cutting-edge Java runtimes and PHP apps to incorporate Apache POI, Eclipse BIRT, and Apache Lucene. Products like WebSphere sMash and Message Broker allow building apps using PHP, Java, and other JVM languages on a shared runtime.
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdfMalak Abu Hammad
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
Goodbye Windows 11: Make Way for Nitrux Linux 3.5.0!SOFTTECHHUB
As the digital landscape continually evolves, operating systems play a critical role in shaping user experiences and productivity. The launch of Nitrux Linux 3.5.0 marks a significant milestone, offering a robust alternative to traditional systems such as Windows 11. This article delves into the essence of Nitrux Linux 3.5.0, exploring its unique features, advantages, and how it stands as a compelling choice for both casual users and tech enthusiasts.
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Infrastructure Challenges in Scaling RAG with Custom AI modelsZilliz
Building Retrieval-Augmented Generation (RAG) systems with open-source and custom AI models is a complex task. This talk explores the challenges in productionizing RAG systems, including retrieval performance, response synthesis, and evaluation. We’ll discuss how to leverage open-source models like text embeddings, language models, and custom fine-tuned models to enhance RAG performance. Additionally, we’ll cover how BentoML can help orchestrate and scale these AI components efficiently, ensuring seamless deployment and management of RAG systems in the cloud.
GraphSummit Singapore | The Future of Agility: Supercharging Digital Transfor...Neo4j
Leonard Jayamohan, Partner & Generative AI Lead, Deloitte
This keynote will reveal how Deloitte leverages Neo4j’s graph power for groundbreaking digital twin solutions, achieving a staggering 100x performance boost. Discover the essential role knowledge graphs play in successful generative AI implementations. Plus, get an exclusive look at an innovative Neo4j + Generative AI solution Deloitte is developing in-house.
How to Get CNIC Information System with Paksim Ga.pptxdanishmna97
Pakdata Cf is a groundbreaking system designed to streamline and facilitate access to CNIC information. This innovative platform leverages advanced technology to provide users with efficient and secure access to their CNIC details.
Best 20 SEO Techniques To Improve Website Visibility In SERPPixlogix Infotech
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
Building Production Ready Search Pipelines with Spark and MilvusZilliz
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.