Tutorial by Examples: n

delete_option function is used to delete an option from the options table. This will delete my_custom_option from the options table. <?php delete_option( 'my_custom_option' ); ?>

update_option function is used to update a value that already exists in the options table. If the option does not exist, then the option will be added with the option value. This will set the default comment status to 'closed': update_option( 'default_comment_status', 'closed' );

The subprocess method that allows running commands needs the command in form of a list (at least using shell_mode=True). The rules to create the list are not always straightforward to follow, especially with complex commands. Fortunately, there is a very helpful tool that allows doing that: shlex. ...

It's quite simple to install wordpress in MAMP. You have to follow a few simple steps: 1 - Download MAMP from here, it's free and you probably don't need the pro version. 2 - Install on your PC or Mac. 3 - Run the program -> you will see a little window open, from there you can set MAMP. At t...

Default WooCommerce checkout form comes with several fields for customers to enter their billing details. But in some cases, you might want to hide some of these fields. For example, if you are selling only virtual products, you can get rid of fields like billing address. Use the following code sn...

data table; set table; length state_full $8; if state = 'KS' then state_full = 'Kansas'; else if state = 'CO' then state_full = 'Colorado'; else state_full = 'Other'; run;

The EntityType enum represents all the entities from Bukkit/Spigot. All its values can be found below. ValueDescriptionAREA_EFFECT_CLOUDN/AARMOR_STANDMechanical entity with an inventory for placing weapons / armor into.ARROWAn arrow projectile; may get stuck in the ground.BATN/ABLAZEN/ABOATA place...

Entities can have passengers. A good example of a passenger is a Player riding a saddled pig, or a zombie inside a minecart. Although there are specific vehicles, any entity can be a vehicle for any other entity with the SetPassenger method. Entity vehicle; Entity passenger; boolean result = veh...

To retrieve a list of nearby entities of an entity, one can use List<Entity> nearby = entity.getNearbyEntities(double x, double y, double z); Bukkit will then calculate a bounding box centered around entity, having as parameters: x: 1/2 the size of the box along x axis y: 1/2 the size ...

Python allows you to hack list comprehensions to evaluate conditional expressions. For instance, [value_false, value_true][<conditional-test>] Example: >> n = 16 >> print [10, 20][n <= 15] 10 Here n<=15 returns False (which equates to 0 in Python). So what Python i...

SystemJS allows to write and use modular javacsript code that relies on ECMAScript 6 import and export statements. One good example is moment.js library, which started publishing ECMAScript 6 source code on npm since 2.10.0 release of moment.js. Installing prerequisites npm install moment npm ins...

var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var app = express(); app.use(favicon(__dirname + '/public/img/favicon.ico')); app.use(express.static(path.join(__dirname, 'public'))); app.listen(3000, function() { console.log("...

var express = require('express'); var app = express(); var router = express.Router(); app.route('/user') .get(function (req, res) { res.send('Get a random user') }) .post(function (req, res) { res.send('Add a user') }) .put(function (req, res) { res.send...

The recommended approach would be to avoid doing so and rather use IOptions<TOptions> and IServiceCollection.Configure<TOptions>. That said, this is still pretty straightforward to make IConfigurationRootavailable application wide. In the Startup.cs constructor you should have the foll...

Install Java 8 from the Oracle website. (Optional) Install a Java build tool. Whether you choose to use Maven or Gradle, you normally don’t have to install anything, as JHipster will automatically install the Maven Wrapper or the Gradle Wrapper for you. If you don’t want to use those wrappers, ...

public class TestngAnnotation { // test case 1 @Test public void testCase1() { System.out.println("in test case 1"); } // test case 2 @Test public void testCase2() { System.out.println("in test case 2"); } @BeforeMethod pu...

The simplest and cleanest way to add an external configuration is through a separate Gradle file build.gradle apply from: './keystore.gradle' android{ signingConfigs { release { storeFile file(keystore.storeFile) storePassword keystore.storePassword ...

Emission is when a surface (or rather a material) emits light. In the inspector panel for a material on a static object using the Standard Shader there is an emission property: If you change this property to a value higher than the default of 0, you can set the emission color, or assign an emissi...

To debug a server instance, start in debug mode. To do so, configure these parameters to be passed to the server: -Xdebug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n to setenv.bat(Windows) or setenv.sh(Unix) These initialize the server in debug mode, and listen for debug reque...

Using more than one theme in your Android application, you can add custom colors to every theme, to be like this: First, we have to add our themes to style.xml like this: <style name="OneTheme" parent="Theme.AppCompat.Light.DarkActionBar"> </style> <!--...