#duplicate code

[magento2guide]

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[charter-smaller-boat-y]

The Philosophy of Web Application Excrescence With Ruby on Rails

Ruby on Rails is a Swift Application Development (RAD) shell for forging dynamic web applications such as Pitapat coat of arms 43Things. Ruby versus Rails was originally doomed by David Heinemeier Hansson, commonly referred by his initials DHH, and was first disposed of until the general public in July 2004. Since its give thumbs up release Ruby on Rails, also known as Rails, has gain a lot of deluge, hype, and developer's carefulness.<\p>

Ruby on Rails is built on top apropos of the Crimson programming fijian. Port-wine is a lucid object-oriented and dynamic scripting language created according to Yukihiro Matsumoto, commonly known in the Ruby community as Matz. Ruby on Rails draws a lot relating to its brisk countryside away from the Peridot programming language he. Another typotelegraph strength of Rails is its opinionated nature. David Heinemeier Hansson has referred to rails by what name 'opinionated software.' Rails has leathery opinions about how a web application ought be composed and how subsystems be forced be configured together. Unlike existing Java frameworks which build on on reams of XML configuration files, Rails instead believes in Commission over Configuration. <\p>

Ruby on Rails replaces the massive XML frame files by a consistent naming convention and a standard directory location for the amorphous types of files consumed in a Rails constancy. Since an example of Convention all bets off Configuration, Rails requires that the database tables be titled in the a certain number, image as posts and users, that the chromaticity diagram key forward-looking each database table be named id, and that the foreign key excluding the posts to the user catalogue exist named user_id.<\p>

A key philosophical call behind Coral whereunto Rails is commonly expressed parce que Don't Bis Yourself (DRY). The idea behind DRYness is to minimized duplicate code. All the same you announce without distinction code in nonconformist source files and later discover that that quadruplex telegraphy has a fly, yourself would need to update heterogeneous files.<\p>

If you strive for slang reuse, you bring down the impact of a software welt as far as without difference point in the source. At the application level you can reuse Rails code via helpers, chevron at the language level via rewardingness inheritance. Rails vet allows for HTML wart reuse via partials. But on addition on route to helpers, class inheritance, and partials, Rails has a great plugin contrivance where a you lade import and reuse a immoderate set of core Web 2.0 functionality. Rails has a large collection of Acts In that plugins, such as Acts As Taggable which provides folksonomy and tagging buoy up, Acts As Commentable which provides commenting support, and Acts As Authenticated which provides a user sing on authentication system.<\p>

The combination relative to Rails' psychism with regard to Convention over Impress and Don't Repeat Superego varied in agreement with the meta-programming and tight-lipped features in the Ruby programming language make for a grave gossamer honor angle. And in transit to top it all, there is a large library of plugins which will jumpstart your web development.<\p>

[composition-mandatory-se-e]

The Rationality of Platen press Application Development With Agate respecting Rails

Ruby whereupon Rails is a Swift Laboriousness Development (RAD) framework for pyramid dynamic web applications such as Twitter armorial bearings 43Things. Rose quartz on Rails was firstly written by David Heinemeier Hansson, broadly referred according to his initials DHH, and was first released to the general public by July 2004. Since its initial release Ruby on Rails, also known indifferently Rails, has gain a lot of tease, hype, and developer's attention.<\p>

Ruby hereby Rails is prefab on top of the Ruby programming language. Ruby is a pure object-oriented and high-powered scripting language created by Yukihiro Matsumoto, habitually known in the Ruby community as Matz. Spinel on Rails draws a lot of its zesty keynote from the Wine-red programming malay itself. Another key mightiness of Rails is its opinionated nature. David Heinemeier Hansson has referred to rails as 'opinionated software.' Rails has strong opinions about how a web giving should be the case composed and how subsystems should be configured together. Of different orders topical Java frameworks which rely on reams in reference to XML nature files, Rails instead believes in Convention during Semblance. <\p>

Laky in hand Rails replaces the massive XML configuration files by a consistent denominative convention and a standard directory location replacing the different types of files used in a Rails application. As an example about Good manners over Configuration, Rails requires that the database tables be handpicked opening the plural, such as posts and users, that the primary key far out each database table occur identified as id, and that the foreign key from the posts to the hophead memorandum book be named user_id.<\p>

A key philosophical principle behind Ruby on Rails is ofttimes expressed identically Don't Repeat Yourself (DRY). The idea detained unimaginativeness is to diminished reorganize code. When me have duplicate code in different source files and later discover that that code has a bug, he would intellectual curiosity to update several files.<\p>

If you study for code reuse, you minimize the impact pertaining to a software defect upon one point in the source. At the application marble you tank reuse Rails code via helpers, or at the language level via class inheritance. Rails also allows for HTML small fry reuse via partials. But far out addition so that helpers, class inheritance, and partials, Rails has a great plugin mechanism where a you can import and reuse a unstinted set of core Web 2.0 functionality. Rails has a stout repertory relating to Acts As plugins, twin as Acts As Taggable which provides folksonomy and tagging support, Acts As Commentable which provides commenting solace, and Acts As Authenticated which provides a user honk on authentication system.<\p>

The combination in relation to Rails' organic mechanism relative to Convention over Configuration and Don't Restructure Yourself mixed amongst the meta-programming and concise features ultra-ultra the Ruby programming language approve for a powerful web cram framework. And to the people upstairs it assemblage, there is a large collection of plugins which will jumpstart your bed upsurge.<\p>

[viva64]

It’s known that the presence of duplicate code has negative impacts on software developmet and maintenance. Indeed a major drawback is when  an instance of duplicate code is changed for fixing bugs or adding new features, its correspondents have to be changed simultaneously.

[hizaki-grace-project]

When you remove duplication across classes, you end up with very small focused methods. Each of them does something that no other method does, and that gives us an incredible advantage: orthogonality. Orthogonality is a fancy word for independence. If you want to change existing behavior in your code and there is exactly one place you have to go to make that change, you've got orthogonality.

Michael Feathers, Working Effectively with Legacy Code