Tutorial by Examples: st

<?php while ($condition): do_something(); endwhile; ?> <?php while ($condition): ?> <p>Do something in HTML</p> <?php endwhile; ?>

<?php foreach ($collection as $item): do_something($item); endforeach; ?> <?php foreach ($collection as $item): ?> <p>Do something in HTML with <?php echo $item; ?></p> <?php endforeach; ?>

<?php switch ($condition): case $value: do_something(); break; default: do_something_else(); break; endswitch; ?> <?php switch ($condition): ?> <?php case $value: /* having whitespace before your cases will cause an error */ ?&g...

<?php if ($condition): do_something(); elseif ($another_condition): do_something_else(); else: do_something_different(); endif; ?> <?php if ($condition): ?> <p>Do something in HTML</p> <?php elseif ($another_condition): ?> <p>...

Numpy installation through pypi (the default package index used by pip) generally fails on Windows computers. The easiest way to install on Windows is by using precompiled binaries. One source for precompiled wheels of many packages is Christopher Gohkle's site. Choose a version according to your ...

Prerequisites nodejs To install the latest stable release of sails with the command-line tool issue following command: $ sudo npm install sails -g Depending on your OS you might not need to use sudo.

Now that the routes are defined, we need to let our application know about the routes. To do this, bootstrap the provider we exported in the previous example. Find your bootstrap configuration (should be in main.ts, but your mileage may vary). //main.ts import {bootstrap} from '@angular/platfo...

execute the following command to insert the text into a view with a focus (if it supports text input) 6.0 Send text on SDK 23+ adb shell "input keyboard text 'Paste text on Android Device'" If already connected to your device via adb: input text 'Paste text on Android Device' 6...

Prints all packages, optionally only those whose package name contains the text in <FILTER>. adb shell pm list packages [options] <FILTER> All <FILTER> adb shell pm list packages Attributes: -f to see their associated file. -i See the installer for the packages. -u to ...

You can't reassign constants. const foo = "bar"; foo = "hello"; Prints: Uncaught TypeError: Assignment to constant.

Declaring a variable const only prevents its value from being replaced by a new value. const does not put any restrictions on the internal state of an object. The following example shows that a value of a property of a const object can be changed, and even new properties can be added, because the ob...

You can initialize a constant by using the const keyword. const foo = 100; const bar = false; const person = { name: "John" }; const fun = function () = { /* ... */ }; const arrowFun = () => /* ... */ ; Important You must declare and initialize a constant in the same statement....

Python supports using a for loop directly on a list: my_list = ['foo', 'bar', 'baz'] for item in my_list: print(item) # Output: foo # Output: bar # Output: baz You can also get the position of each item at the same time: for (index, item) in enumerate(my_list): print('The item i...

GitHub is a huge collection of Git repositories. In other words, you can think of GitHub as a collection of many projects! Creating An Account Visit GitHub's main page Here Pick a username, enter in your email address, and pick a secure password and you're ready to go! Useful Tools For Git/...

Basic Usage cargo test Show program output cargo test -- --nocapture Run specific example cargo test test_name

Let's say you have a simple myblog app with the following model: from django.conf import settings from django.utils import timezone class Article(models.Model): title = models.CharField(max_length=70) slug = models.SlugField(max_length=70, unique=True) author = models.ForeignKe...

Template views are fine for static page and you could use them for everything with get_context_data but it would be barely better than using function as views. Enter ListView and DetailView app/models.py from django.db import models class Pokemon(models.Model): name = models.CharField(max...

The basic idea of a class template is that the template parameter gets substituted by a type at compile time. The result is that the same class can be reused for multiple types. The user specifies which type will be used when a variable of the class is declared. Three examples of this are shown in m...

To start a new thread: use std::thread; fn main() { thread::spawn(move || { // The main thread will not wait for this thread to finish. That // might mean that the next println isn't even executed before the // program exits. println!("Hello from spa...

The jQuery UI framework helps to extend and increase the User Interface controls for jQuery JavaScript library. When you wish to use jQuery UI, you will need to add these libraries to your HTML. A quick way to start is using the Content Delivery Network available code sources: jQuery Libraries ht...