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Ruby is a dynamic, reflective programming language developed in Japan. It has features like metaprogramming, object-oriented programming, dynamic typing and blocks. Some key aspects include Ruby on Rails web framework, Sinatra microframework, string and list processing methods, classes, modules, duck typing and dynamic method definition.
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javase8bestpractices-151015135520-lva1-app6892
This document provides an overview of Java SE 8 best practices according to Stephen Colebourne based on over a year of using Java 8. Some key best practices discussed include using lambdas and functional interfaces to improve code readability and abstraction, replacing checked exceptions with unchecked exceptions when using lambdas, using Optional to replace null references on public APIs and return types, leveraging the Stream API for processing collections but not overusing it, and adopting the new Date and Time API to replace Java Date/Calendar.
Java SE 8 best practices
Lambdas and streams are key new features in Java 8. Lambdas allow blocks of code to be passed around as if they were objects. Streams provide an abstraction for processing collections of objects in a declarative way using lambdas. Optional is a new class that represents null-safe references and helps avoid null pointer exceptions. Checked exceptions can cause issues with lambdas, so helper methods are recommended to convert checked exceptions to unchecked exceptions.
Lambda Expressions Java 8 Features usage
Lambda expressions in Java 8 enable functional programming and allow code blocks to be treated as values. They provide a more readable and concise syntax than traditional anonymous classes. Lambdas improve APIs and support parallel processing. Functional programming separates code from objects and allows independent functions. Lambda expressions infer types from functional interfaces and can implement interfaces like Runnable more concisely than anonymous classes. Java 8 defines functional interfaces to have a single abstract method to be compatible with lambdas. Common functional interfaces include Predicate and Consumer. Streams and Optional are new classes that work with lambdas to support functional-style operations on collections and optional values.
Lambda Expressions in Java 8
The document is a presentation on lambda expressions in Java 8 given by Isaac Carter. It introduces lambda expressions and functional programming concepts in Java 8 such as functional interfaces, streams, and method references. It provides examples of using lambda expressions with common Java 8 APIs like forEach(), Predicate, and stream(). The presentation emphasizes thinking declaratively rather than imperatively in Java 8 and leveraging lambda expressions to let Java do more of the work.
Java 8 - An Overview
Java 8 introduced several new features including lambda expressions, default methods in interfaces, streams API and others. Lambda expressions allow implementing functional interfaces using anonymous functions. Interfaces can now define default and static methods. The streams API allows performing bulk operations on collections in a declarative way. Some performance improvements in Java 8 include faster common data structures like HashMap, garbage collector improvements and enhanced fork/join framework.
Rubyforjavaprogrammers 1210167973516759-9
Ruby for Java Programmers provides an overview of the Ruby programming language for Java developers. It discusses Ruby's origins and timeline, key differences from Java like duck typing and mixins, and how Ruby approaches concepts like classes, objects, and closures differently. The document aims to explain Ruby's philosophy and help Java programmers transition to Ruby's more dynamic style.
Rubyforjavaprogrammers 1210167973516759-9
Ruby for Java Programmers provides an overview of the Ruby programming language for Java developers. Some key points:
- Ruby was created in 1993 and gained popularity with the Rails framework in the mid-2000s. It influences include Smalltalk and Lisp.
- Ruby is dynamically typed with duck typing. Classes are objects that can be modified. Everything is an object with message passing.
- Similarities to Java include garbage collection and use of a virtual machine. Differences include optional syntax, mixins instead of interfaces, and reopening of classes.
- Ruby focuses on solving problems concisely while Java focuses on reusable building blocks. Closures and metaprogramming allow more flexible programming in Ruby.
Mobile Software Engineering Crash Course - C02 Java Primer
This document provides an introduction to the Java programming language. It discusses Java concepts like object-oriented programming, the Java Virtual Machine, primitive data types, variables, control flow, classes and objects, inheritance, interfaces, exceptions, collections, multithreading, design patterns, and more. It also includes code examples and references to Oracle's Java documentation for further reading.
Functional Programming In Jdk8
The document provides an overview of functional programming concepts in Java 8. It discusses how functions are now first-class citizens in Java that can be passed as parameters and returned from other functions. Lambda expressions are introduced as anonymous functions that can be used to concisely represent implementations of functional interfaces. The document also discusses how lambda expressions are compiled using invokedynamic rather than by converting them to anonymous inner classes, and how this allows them to be more efficient. Finally, it covers additional Java 8 features like streams that further support a functional style of programming.
Functional programming in java 8 by harmeet singh
Cover Basic concept for Functional Programming in Java. Define new functional interfaces, lambda expressions, how to translate lambda expression, JVM deal with new byte code etc. This is not the perfect slides for functional programming, but trying cover simple basic functional programming.
Java 8-revealed
This document provides an overview of new features being introduced in Java 8, with a focus on lambda expressions, default methods, and bulk data operations. It discusses the syntax and usage of lambda expressions, how they are represented at runtime using functional interfaces, and how variable capturing works. New functional interfaces being added to Java 8 are presented, including examples like Consumer and Function. The document also explores how lambda expressions are compiled, showing how invokedynamic bytecode instructions are used to dispatch lambda calls at runtime. In summary, the document serves as an introduction to key new language features in Java 8 that improve support for functional programming and parallel operations.
Introduction to Scala
Scala is a functional/object-oriented hybrid programming language for the JVM that integrates with existing Java libraries. It aims to remove roadblocks from Java through features like closures, pattern matching, and implicit functions while retaining compatibility. Some key aspects include static typing, concise syntax, native support for XML/JSON, and treating functions as objects.
Metaprogramming in Ruby
Metaprogramming involves writing code that manipulates language constructs and generates or modifies code at runtime. This allows developers to define domain-specific languages, remove duplications, and enhance Ruby's core functionality. Everything in Ruby is an object, including classes and modules. Metaprogramming techniques like monkey patching, dynamic methods, and refinements allow modifying classes and modules at runtime. However, metaprogramming should be avoided when possible, as it can reduce code readability and maintainability.
Introduction of Java 8 with emphasis on Lambda Expressions and Streams
Lambda expressions and streams are major new features in Java 8. Lambda expressions allow treating functionality as a method argument or variable. Streams provide a new way to process collections of objects in a declarative way using intermediate and terminal operations. The document provides examples of lambda expressions, method references, functional interfaces, default methods on interfaces, and stream operations like filter, map, and reduce.
C# - Igor Ralić
This document provides an overview of the C# programming language. It discusses key features of C# such as being object-oriented, type-safe, and developed by Microsoft. It also covers .NET Framework, generics, delegates, events, exceptions, and asynchronous programming. The document lists additional resources for learning more about C# programming.
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Mobile Software Engineering Crash Course - C02 Java Primer
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Introduction of Java 8 with emphasis on Lambda Expressions and Streams
Introduction of Java 8 with emphasis on Lambda Expressions and Streams
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Swift
This document discusses key differences between Objective-C and Swift including lack of C in Swift, language features like lambda functions, type inference, generics, extensions, protocols, memory management without garbage collection, and differences in arrays, dictionaries, functions, closages, optionals, classes, and protocols. It provides examples of string interpolation, type inference with let, array and dictionary syntax and copying behavior, trailing closures, optionals unwrapping, generics constraints, and extending existing classes.
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The document discusses how to use various AWS services like Cognito, S3, Lambda, and API Gateway from an iOS application using the AWS SDK for iOS. It provides code snippets for creating an identity pool in Cognito, storing and retrieving data from Cognito Sync, uploading files to S3, invoking Lambda functions, and generating an iOS SDK for a API Gateway API.
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Aws(sns)
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2. Registering the certificates and keys with AWS SNS to authorize push access
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Ionic3
This document provides a 10 step process for setting up push notifications for an Ionic mobile app on iOS:
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Este documento fornece instruções para instalar o Ionic e Cordova, configurar um servidor REST com Node.js e Express, e criar um aplicativo Ionic com Angular que consome dados da API REST.
Node js
Node.js is a JavaScript runtime built on Chrome's V8 engine that allows JavaScript to run on the server side or as a standalone application. It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, as it can handle multiple concurrent connections while waiting for responses. Common uses of Node.js include building web servers, real-time applications, command line tools, and more due to its asynchronous and event-driven nature.
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This document provides instructions for setting up a Node.js and Express application on an EC2 instance and deploying Express and Node.js Lambda functions, including installing dependencies, creating sample applications, and testing Lambda functions by sending events.
Scala
Scala is a multi-paradigm programming language that combines object-oriented and functional programming principles. It is designed to express common programming patterns in a concise, elegant, and type-safe way. Some key features of Scala include its static typing, support for functional programming using traits, case classes, pattern matching, and immutable data structures like lists and maps.
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Python
Python is a lightweight language well-suited for data science. It uses duck typing and dynamic name resolution. Common features include lists, dictionaries, tuples, sets, higher-order functions, list comprehensions, generators, object-oriented programming, and data analysis libraries like Pandas and Seaborn. Guido van Rossum has spent up to 50% of his time working on Python improvements at Dropbox.
Golang
This document provides an overview of key Go programming language concepts including concurrency using goroutines and channels, functions, pointers, interfaces, object-oriented programming using types and methods, and building HTTP servers. It also briefly mentions Go's memory management using garbage collection and compares Go's features to other languages like C, C++, and Java.
Bootstrap
Bootstrap is a front-end framework for responsive web design that uses HTML, CSS and JavaScript to make responsive websites. It utilizes a mobile-first approach and responsive design principles to automatically resize and adapt content based on screen resolution using CSS media queries and a 12-column grid system. Bootstrap can also be easily integrated with JavaScript frameworks like AngularJS.
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CoffeeScript is a programming language created by Jeremy Ashkenas that transpires to JavaScript. It aims to enhance JavaScript with syntax sugar like lambda functions, list comprehensions, and class definitions. CoffeeScript code reads like English and removes unnecessary characters like semicolons and parentheses from JavaScript. Classes in CoffeeScript are based on JavaScript's prototype-based inheritance, and new objects created with the new keyword link to the class's prototype for property lookup.
AngularJS
This document provides an overview of key JavaScript concepts like first class objects, encapsulation, and callbacks. It then summarizes features of AngularJS like data binding, filters, modules, routing, and directives. It concludes by discussing the evolution of JavaScript with new versions of ECMAScript and languages that transpile to JavaScript like TypeScript and CoffeeScript.
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一比一原版(UMN毕业证)明尼苏达大学毕业证如何办理
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国外大学明尼苏达大学明尼苏达大学毕业证offer制作方法（一对一专业服务）
1客户提供办理信息：姓名生日专业学位毕业时间等（如信息不确定可以咨询顾问：我们有专业老师帮你查询）；
2开始安排制作毕业证成绩单电子图；
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4毕业证成绩单电子版您确认信息无误之后安排制作成品；
5成品做好拍照或者视频给您确认；
6快递给客户（国内顺丰国外DHLUPS等快读邮寄）
— — 制作工艺 【高仿真】— —
凭借多年的制作经验本公司制作明尼苏达大学明尼苏达大学毕业证offer《激光》《水印》《钢印》《烫金》《紫外线》凹凸版uv版等防伪技术一流高精仿度几乎跟学校100%相同！让您绝对满意。
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14 th Edition of International conference on computer vision
About the event
14th Edition of International conference on computer vision
Computer conferences organized by ScienceFather group. ScienceFather takes the privilege to invite speakers participants students delegates and exhibitors from across the globe to its International Conference on computer conferences to be held in the Various Beautiful cites of the world. computer conferences are a discussion of common Inventions-related issues and additionally trade information share proof thoughts and insight into advanced developments in the science inventions service system. New technology may create many materials and devices with a vast range of applications such as in Science medicine electronics biomaterials energy production and consumer products.
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What next after learning python programming basics
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在线购买加拿大英属哥伦比亚大学毕业证本科学位证书原版一模一样
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
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Measures in SQL (SIGMOD 2024, Santiago, Chile)
SQL has attained widespread adoption, but Business Intelligence tools still use their own higher level languages based upon a multidimensional paradigm. Composable calculations are what is missing from SQL, and we propose a new kind of column, called a measure, that attaches a calculation to a table. Like regular tables, tables with measures are composable and closed when used in queries.
SQL-with-measures has the power, conciseness and reusability of multidimensional languages but retains SQL semantics. Measure invocations can be expanded in place to simple, clear SQL.
To define the evaluation semantics for measures, we introduce context-sensitive expressions (a way to evaluate multidimensional expressions that is consistent with existing SQL semantics), a concept called evaluation context, and several operations for setting and modifying the evaluation context.
A talk at SIGMOD, June 9–15, 2024, Santiago, Chile
Authors: Julian Hyde (Google) and John Fremlin (Google)
https://doi.org/10.1145/3626246.3653374
Mobile App Development Company In Noida | Drona Infotech
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一比一原版(USF毕业证)旧金山大学毕业证如何办理
USF硕士毕业证成绩单【微信95270640】一比一伪造旧金山大学文凭@假冒USF毕业证成绩单+Q微信95270640办理USF学位证书@仿造USF毕业文凭证书@购买旧金山大学毕业证成绩单USF真实使馆认证/真实留信认证回国人员证明
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国外毕业证学位证成绩单办理方法：
1客户提供办理旧金山大学旧金山大学本科毕业证成绩单信息：姓名生日专业学位毕业时间等（如信息不确定可以咨询顾问：我们有专业老师帮你查询）；
2开始安排制作毕业证成绩单电子图；
3毕业证成绩单电子版做好以后发送给您确认；
4毕业证成绩单电子版您确认信息无误之后安排制作成品；
5成品做好拍照或者视频给您确认；
6快递给客户（国内顺丰国外DHLUPS等快读邮寄）。
教育部文凭学历认证认证的用途：
如果您计划在国内发展那么办理国内教育部认证是必不可少的。事业性用人单位如银行国企公务员在您应聘时都会需要您提供这个认证。其他私营 #外企企业无需提供！办理教育部认证所需资料众多且烦琐所有材料您都必须提供原件我们凭借丰富的经验帮您快速整合材料让您少走弯路。
实体公司专业为您服务如有需要请联系我: 微信95270640奈一次次令他失望山娃今年岁上五年级识得很多字从走出小屋开始山娃就知道父亲的家和工地共有一个很动听的名字——天河工地的底层空空荡荡很宽阔很凉爽在地上铺上报纸和水泥袋父亲和工人们中午全睡在地上地面坑坑洼洼山娃曾多次绊倒过也曾有长铁钉穿透凉鞋刺在脚板上但山娃不怕工地上也常有五六个从乡下来的小学生他们的父母亲也是高楼上的建筑工人小伙伴来自不同省份都操着带有浓重口音的普通话可不知为啥山娃不仅很快与他们熟识了
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