Tutorial by Examples: o

This example shows how to create a table, insert data, and select from the database using the SQLAlchemy ORM. For information re: SQLAlchemy Core, see here. First things first, we need to connect to our database, which is identical to how we would connect using SQLAlchemy Core (Core). from sqlalch...

add_action( 'wp_enqueue_scripts', 'enqueue_my_styles_and_scripts' ); /** * Enqueue styles (or scripts) conditionally. * * Load stylesheets (or scripts) specifically for IE. IE10 and above does * not support conditional comments in standards mode. * * @link https://gist.github.com/wpsc...

The most basic instance of an if construct evaluates a condition and executes some code according to the condition outcome. If the condition returns true, the code within the conditional is executed. counter = 10 if counter is 10 console.log 'This will be executed!' The if construct can be e...

To start using Spring data JPA, you must include the dependency in your project with the one of Spring core, all together. If you're using Maven as dependency management system (replace version-number for the version you want to use): <dependencies> <dependency> <groupI...

add_action( 'wp_enqueue_scripts', 'enqueue_my_styles_and_scripts' ); /** * Enqueue scripts (or styles) conditionally. * * Load scripts (or stylesheets) specifically for IE. IE10 and above does * not support conditional comments in standards mode. * * @link https://gist.github.com/wpsc...

An array column is supported by PostgreSQL. Rails will automatically convert a PostgreSQL array to a Ruby array, and vice-versa. Create a table with an array column: create_table :products do |t| t.string :name t.text :colors, array: true, default: [] end Add an array column to an existi...

Make sure your tomcat configurations file, server.xml has this line: <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol" maxHttpHeaderSize="8192" SSLEnabled="true" maxThreads="150" minSpareThrea...

PHP 5.5 introduces Generators and the yield keyword, which allows us to write asynchronous code that looks more like synchronous code. The yield expression is responsible for giving control back to the calling code and providing a point of resumption at that place. One can send a value along the yi...

Icicle uses Awaitables and Generators to create Coroutines. require __DIR__ . '/vendor/autoload.php'; use Icicle\Awaitable; use Icicle\Coroutine\Coroutine; use Icicle\Loop; $generator = function (float $time) { try { // Sets $start to the value returned by microtime() after ap...

Unzipping a zip archive is done with unzip function from the utils package (which is included in base R). unzip(zipfile = "bar.zip", exdir = "./foo") This will extract all files in "bar.zip" to the "foo" directory, which will be created if necessary. Tilde...

Extracting files from a tar archive is done with untar function from the utils package (which is included in base R). untar(tarfile = "bar.tar", exdir = "./foo") This will extract all files in "bar.tar" to the "foo" directory, which will be created if nece...

This attribute applies a version to the assembly. [assembly: AssemblyVersion("1.0.*")] The * character is used to auto-increment a portion of the version automatically every time you compile (often used for the "build" number)

Iterators produce enumerators. In C#, enumerators are produced by defining methods, properties or indexers that contain yield statements. Most methods will return control to their caller through normal return statements, which disposes all state local to that method. In contrast, methods that use y...

Codeigniter may be configured to run more than one project without duplicating CI core files. It's possible by splitting CI Application side. For example let's take project of website, which contains front-end and back-end Content Management System (CMS) applications. In this case CI folder struct...

Vlookup finds some value in the leftmost column of a range and returns a value some number of columns to the right and in the same row. Let's say you want to find the surname of Employee ID 2 from this table: =VLOOKUP(2,$A$2:$C$4,3,0) The value you're retrieving data for is 2 The table you...

https://github.com/jaymedavis/stripe.net is a great starting point. Assuming you are using MVC w/Razor you need to have a few things in your View page <script type="text/javascript" src="https://js.stripe.com/v2/"></script> This script calls upon the stripe.js t...

Your code in source control has version numbers either by default (SVN ids or Git SHA1 hashes) or explicitly (Git tags). Rather than manually updating versions in AssemblyInfo.cs you can use a build time process to write the version from your source control system into your AssemblyInfo.cs files and...

It's good practice to complete your AssemblyInfo's default fields. The information may be picked up by installers and will then appear when using Programs and Features (Windows 10) to uninstall or change a program. The minimum should be: AssemblyTitle - usually the namespace, i.e. MyCompany.MySo...

A higher-order function is one that takes another function as an argument or returns a function (or both). This is commonly done with lambdas, for example when passing a predicate to a LINQ Where clause: var results = data.Where(p => p.Items == 0); The Where() clause could receive many diffe...

This example shows how a MongoDB collection can be displayed in a React component. The collection is continuously synchronized between server and client, and the page instantly updates as database contents change. To connect React components and Meteor collections, you'll need the react-meteor-data...