The document discusses configuring websocket on Apache by installing Apache on CentOS, installing the websocket_rails gem and Redis, configuring a virtual host with a proxy server, and starting the websocket_rails server. Key steps include installing Apache, installing websocket_rails and Redis, configuring a virtual host to proxy websocket requests to the websocket_rails server on port 3001, and initializing websockets in JavaScript by connecting to the server hostname and port.
How to build a news website use CMS wordpressbaran19901990
This tutorial wil show you, how to build a news website use CMS Wordpress step by step. From basic to advantage. I think that this tutorial is amazing and very basic for newbie.
The document discusses syntax analysis and parsing. It covers context-free grammars, Backus-Naur Form (BNF), Extended BNF, and different parsing techniques like recursive descent parsing and LL parsing. It also discusses Scala's combinator parser, which uses parser combinators to parse input based on a grammar.
The document discusses configuring websocket on Apache by installing Apache on CentOS, installing the websocket_rails gem and Redis, configuring a virtual host with a proxy server, and starting the websocket_rails server. Key steps include installing Apache, installing websocket_rails and Redis, configuring a virtual host to proxy websocket requests to the websocket_rails server on port 3001, and initializing websockets in JavaScript by connecting to the server hostname and port.
How to build a news website use CMS wordpressbaran19901990
This tutorial wil show you, how to build a news website use CMS Wordpress step by step. From basic to advantage. I think that this tutorial is amazing and very basic for newbie.
The document discusses syntax analysis and parsing. It covers context-free grammars, Backus-Naur Form (BNF), Extended BNF, and different parsing techniques like recursive descent parsing and LL parsing. It also discusses Scala's combinator parser, which uses parser combinators to parse input based on a grammar.
This document discusses key concepts related to variables in programming languages including names, bindings, scopes, and lifetimes. It covers different types of variables such as static, stack dynamic, and heap dynamic variables. It also compares static and dynamic scoping models and how they determine variable visibility. The referencing environment is defined as the collection of all visible variables for a given statement.
The document discusses lexical analysis, which is the first stage of syntax analysis for programming languages. It covers terminology, using finite automata and regular expressions to describe tokens, and how lexical analyzers work. Lexical analyzers extract lexemes from source code and return tokens to the parser. They are often implemented using finite state machines generated from regular grammar descriptions of the lexical patterns in a language.
The document provides information about a programming languages course, including:
- The lecturer's details and contact information.
- Assessment criteria including tutorials, assignments, exams.
- An outline of course topics such as language categories, evaluation criteria, and implementation methods.
- References and resources used in the course.
This document discusses various data types in programming languages including primitive, string, array, record, union, and pointer types. It provides details on how each type is defined and implemented in different languages. Primitive types include integers, floats, decimals, booleans, characters. Strings can have static or dynamic lengths. Arrays can be static, dynamic and allow various index types and initialization. Records group heterogeneous data under field names. Unions allow storing different types in a variable. Pointers provide indirect addressing but require careful use to avoid dangling references.
This document provides an overview of logic programming and the logic programming language Prolog. It discusses key concepts in logic programming like predicates, clauses, resolution, and backward chaining. It also describes the basic syntax and execution model of Prolog, including how it uses unification, backtracking, and trace to evaluate queries against a knowledge base of facts and rules.
Implementing subprograms requires saving execution context, allocating activation records, and maintaining dynamic or static chains. Activation records contain parameters, local variables, return addresses, and dynamic/static links. Nested subprograms are supported through static chains that connect activation records. Dynamic scoping searches the dynamic chain for non-local variables, while shallow access uses a central variable table. Blocks are implemented as parameterless subprograms to allocate separate activation records for block variables.
This document discusses subprograms (also called subroutines) in programming languages. It covers:
- The basic definitions and characteristics of subprograms, including headers, parameters, and local variables.
- Different parameter passing methods like pass-by-value, pass-by-reference, and their implementation in common languages.
- Additional features of subprograms including overloading, generics, and functions passing subprograms as parameters.
This document discusses principles of sequence control in programming languages. It covers expressions, assignment statements, selection statements like if/else and switch/case, and iterative statements like for, while, and loops controlled by data structures. It provides examples of how these concepts are implemented in different languages like C, Pascal, and C#. Unconditional branching with goto is also discussed, noting that while powerful it can hurt readability so most modern languages avoid or restrict it.
To install git on Ubuntu, the document outlines 6 steps: 1) create a GitHub account using your company email, 2) read documentation on using git, 3) install git via terminal commands, 4) configure git with your name and email, 5) verify settings, and 6) review common git commands like cloning, adding, committing, and pushing files. The summary is to create a GitHub account, get added to your company's GitHub by sending your profile URL to your leader.
Ruby has methods to convert objects to different data types: to_s converts objects to strings, to_i converts objects to integers, and to_a converts objects to arrays. Arrays in Ruby are denoted using square brackets [].
Controllers handle web requests from users and interact with views and models. Views display templates filled with application data and convert it to HTML. Models represent and wrap application data stored in the database. Helpers assist models, views, and controllers. Common Rails methods include link_to for creating links and migrations for modifying the database schema by adding, removing, or changing columns.
This document provides instructions for various commands in Vim and Git. In Vim, I inserts text while in Normal mode commands like :wq save and quit. dd deletes the current line while yy copies it. Git commands like git add stage changes and git commit commits them to the local repository. git push pushes local changes to the remote server repository.
The document discusses metamodeling and its use in the MDA framework. It defines key terms like model, language, metamodel, and metalanguage. A metamodel is a model that defines the constructs and rules of a modeling language. It allows unambiguous definition of languages so transformation tools can process models. Transformation rules in a definition reference the source and target metamodels to specify how one model transforms to another. Metamodeling provides the mechanism to formally define modeling languages in MDA.
This document discusses key concepts related to variables in programming languages including names, bindings, scopes, and lifetimes. It covers different types of variables such as static, stack dynamic, and heap dynamic variables. It also compares static and dynamic scoping models and how they determine variable visibility. The referencing environment is defined as the collection of all visible variables for a given statement.
The document discusses lexical analysis, which is the first stage of syntax analysis for programming languages. It covers terminology, using finite automata and regular expressions to describe tokens, and how lexical analyzers work. Lexical analyzers extract lexemes from source code and return tokens to the parser. They are often implemented using finite state machines generated from regular grammar descriptions of the lexical patterns in a language.
The document provides information about a programming languages course, including:
- The lecturer's details and contact information.
- Assessment criteria including tutorials, assignments, exams.
- An outline of course topics such as language categories, evaluation criteria, and implementation methods.
- References and resources used in the course.
This document discusses various data types in programming languages including primitive, string, array, record, union, and pointer types. It provides details on how each type is defined and implemented in different languages. Primitive types include integers, floats, decimals, booleans, characters. Strings can have static or dynamic lengths. Arrays can be static, dynamic and allow various index types and initialization. Records group heterogeneous data under field names. Unions allow storing different types in a variable. Pointers provide indirect addressing but require careful use to avoid dangling references.
This document provides an overview of logic programming and the logic programming language Prolog. It discusses key concepts in logic programming like predicates, clauses, resolution, and backward chaining. It also describes the basic syntax and execution model of Prolog, including how it uses unification, backtracking, and trace to evaluate queries against a knowledge base of facts and rules.
Implementing subprograms requires saving execution context, allocating activation records, and maintaining dynamic or static chains. Activation records contain parameters, local variables, return addresses, and dynamic/static links. Nested subprograms are supported through static chains that connect activation records. Dynamic scoping searches the dynamic chain for non-local variables, while shallow access uses a central variable table. Blocks are implemented as parameterless subprograms to allocate separate activation records for block variables.
This document discusses subprograms (also called subroutines) in programming languages. It covers:
- The basic definitions and characteristics of subprograms, including headers, parameters, and local variables.
- Different parameter passing methods like pass-by-value, pass-by-reference, and their implementation in common languages.
- Additional features of subprograms including overloading, generics, and functions passing subprograms as parameters.
This document discusses principles of sequence control in programming languages. It covers expressions, assignment statements, selection statements like if/else and switch/case, and iterative statements like for, while, and loops controlled by data structures. It provides examples of how these concepts are implemented in different languages like C, Pascal, and C#. Unconditional branching with goto is also discussed, noting that while powerful it can hurt readability so most modern languages avoid or restrict it.
To install git on Ubuntu, the document outlines 6 steps: 1) create a GitHub account using your company email, 2) read documentation on using git, 3) install git via terminal commands, 4) configure git with your name and email, 5) verify settings, and 6) review common git commands like cloning, adding, committing, and pushing files. The summary is to create a GitHub account, get added to your company's GitHub by sending your profile URL to your leader.
Ruby has methods to convert objects to different data types: to_s converts objects to strings, to_i converts objects to integers, and to_a converts objects to arrays. Arrays in Ruby are denoted using square brackets [].
Controllers handle web requests from users and interact with views and models. Views display templates filled with application data and convert it to HTML. Models represent and wrap application data stored in the database. Helpers assist models, views, and controllers. Common Rails methods include link_to for creating links and migrations for modifying the database schema by adding, removing, or changing columns.
This document provides instructions for various commands in Vim and Git. In Vim, I inserts text while in Normal mode commands like :wq save and quit. dd deletes the current line while yy copies it. Git commands like git add stage changes and git commit commits them to the local repository. git push pushes local changes to the remote server repository.
The document discusses metamodeling and its use in the MDA framework. It defines key terms like model, language, metamodel, and metalanguage. A metamodel is a model that defines the constructs and rules of a modeling language. It allows unambiguous definition of languages so transformation tools can process models. Transformation rules in a definition reference the source and target metamodels to specify how one model transforms to another. Metamodeling provides the mechanism to formally define modeling languages in MDA.