Tutorial by Examples: re

A common usecase for the ready() hook is to access the DOM, e.g. to initiate a Javascript plugin, get the dimensions of an element etc. The problem Due to Vue's asynchronous DOM update mechanism, it's not guaranteed that the DOM has been fully updated when the ready() hook is called. This usually ...

PHP provides an alternative syntax for some control structures: if, while, for, foreach, and switch. When compared to the normal syntax, the difference is, that the opening brace is replaced by a colon (:) and the closing brace is replaced by endif;, endwhile;, endfor;, endforeach;, or endswitch;, ...

declare is used to set an execution directive for a block of code. The following directives are recognized: ticks encoding strict_types For instance, set ticks to 1: declare(ticks=1); To enable strict type mode, the declare statement is used with the strict_types declaration: declare(s...

require require is similar to include, except that it will produce a fatal E_COMPILE_ERROR level error on failure. When the require fails, it will halt the script. When the include fails, it will not halt the script and only emit E_WARNING. require 'file.php'; PHP Manual - Control Structures - ...

The return statement returns the program control to the calling function. When return is called from within a function, the execution of the current function will end. function returnEndsFunctions() { echo 'This is executed'; return; echo 'This is not executed.'; } When you run re...

foreach is a construct, which enables you to iterate over arrays and objects easily. $array = [1, 2, 3]; foreach ($array as $value) { echo $value; } Outputs: 123. To use foreach loop with an object, it has to implement Iterator interface. When you iterate over associative arrays: $arra...

You must be very careful when providing a forwarding reference overload as it may match too well: struct A { A() = default; // #1 A(A const& ) = default; // #2 template <class T> A(T&& ); // #3 }; The intent here was that A is c...

In Index page change the following: error_reporting(E_ALL | E_STRICT); to error_reporting(E_ALL); Set $_SERVER['MAGE_IS_DEVELOPER_MODE'] = true and uncomment this line (remove the #) #ini_set('display_errors', 1); You can also Set Dev Mode using SetEnv in your .htaccess file To make th...

Creating and returning an image object by loading the image data from the file at the specified path. Example: UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[cellCountry objectForKey:@"Country_Flag"] ofType:nil]]; Using Array: Example NSM...

# Extract strings with a specific regex df= df['col_name'].str.extract[r'[Aa-Zz]'] # Replace strings within a regex df['col_name'].str.replace('Replace this', 'With this') For information on how to match strings using regex, see Getting started with Regular Expressions.

Creating List Items SP.SOD.executeOrDelayUntilScriptLoaded(createItem,"sp.js"); function createItem(){ var clientContext = new SP.ClientContext(); var list = clientContext.get_web().get_lists().getByTitle("List Title"); var newItem = list.addItem(); newIte...

SP.SOD.executeOrDelayUntilScriptLoaded(showUserInfo,"sp.js"); function showUserInfo(){ var clientContext = new SP.ClientContext(); var user = clientContext.get_web().get_currentUser(); clientContext.load(user); clientContext.executeQueryAsync(function(){ ...

In order to obtain class-like behavior, type and related procedures (subroutine and functions) shall be placed in a module: Example: module MShape implicit none private type, public :: Shape private integer :: radius contains procedure :: set => sh...

var request = new XMLHttpRequest(); request.onreadystatechange = (e) => { if (request.readyState !== 4) { return; } if (request.status === 200) { console.log('success', request.responseText); } else { console.warn('error'); } }; request.open('GET', 'https://my...

int squareNum (int a) { return a*a; } int : return type squareNum : function name int a : parameter type and name return a*a : return a value (same type as the return type defined at the beginning)

Since Matlab R2014b it is easily possible to achieve semi-transparent markers for line and scatter plots using undocumented features introduced by Yair Altman. The basic idea is to get the hidden handle of the markers and apply a value < 1 for the last value in the EdgeColorData to achieve the d...

Sometimes it is useful to create union types with only one case to implement record-like types: type Point = Point of float * float let point1 = Point(0.0, 3.0) let point2 = Point(-2.5, -4.0) These become very useful because they can be decomposed via pattern matching in the same way as tu...

Array.prototype.map(): Returns a new array with the results of calling a provided function on every element in the original array. The following code example takes an array of persons and creates a new array containing persons with a 'fullName' property var personsArray = [ { id: 1, f...

In JavaScript all arguments are passed by value. When a function assigns a new value to an argument variable, that change will not be visible to the caller: var obj = {a: 2}; function myfunc(arg){ arg = {a: 5}; // Note the assignment is to the parameter variable itself } myfunc(obj); conso...

During development, when certain code paths must be prevented from the reach of control flow, you may use assert(0) to indicate that such a condition is erroneous: switch (color) { case COLOR_RED: case COLOR_GREEN: case COLOR_BLUE: break; default: assert(0); ...