Programming and DevOps blog
Generally PHP closures are constructions of an anonymous function (a function without a name) stored in variable. For example:
$records=someFunctionToGetAllRecords();
$getRecord = function($recNum)use($records){
return $records[$recNum];
}
var_dump($getRecord(10))
//Will return a specified record from records array
Comparison Subversion vs Git can be interesting for a junior developer. Git and SVN both are version control systems (VCS). Their main purpose is to allow developer track project development progress. With VCS you can revert your project’s code to any version in the past. It’s extremely useful in bug fixing and new feature development.
There are many VCS and today I want to compare probably two most popular of them – Git and SVN.
XPath is a way to locate elements on a web page – like CSS selectors, but more suitable in some cases. I use it selectors for web page scraping and testing.
Here is the list of XPath selector examples very useful for me:
Website integration tests are extremely useful for front-end development. Automatic website testing makes you sure that your website works properly, that you haven’t broken something working on recent updates. I write front-end integration tests using Selenium technology and Nightwatch (written in NodeJS) or JUnit (written in Java).
Continue reading “Nightwatch – automatic website testing using Selenium server”
Subversion (SVN) is centralized revision control version. That means you have one central server and many SVN clients installed on developer’s workstations. When a developer commits, code updates are sent to the server immediately (in contrast to Git, where commits stored in local repositories and pushed to the central repository manually).
Anyway SVN is very old and inflexible revision control system – it has many disadvantages comparing with Git. But it is used for some old projects and it can be useful to know some basic SVN commands.