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Viewport

Without viewport META tag the mobile browser will render desktop site.

Basic viewport declaration

<meta name="viewport">

<meta name="viewport" content="width=device-width">

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Primitives

• String
• Number
• Boolean
• Undefined
• Null

Variables

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Arrays

Arrays are data structures with automatically indexed positions. Array indices are zero–based.

Creating arrays

Literal notation

JSLint suggests literal notation for creating arrays and objects. Allows for initializing values.

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Loops

While loops are initialized outside of the loop, eg in a var

var number = 0;
while (number < 10) {
    console.log(number);
    number++; // incrementer inside loop
}

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Conditionals

Conditionals execute certain code that meet specific conditions

Conditional Statements

If, Else

if (someColor == blue) {

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Built–Ins

alert() Sends message to user in small pop-up window

confirm() Asks for consent to move forward. Cancel returns false, OK returns true

prompt() Sends a message and retrieves an entry.

typeof() Useful for checking a variable's contents

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Closures

A closure is a function returned from a function complete with external variables.

The entire contents of an inner function will still be available outside the outermost function.

function simpleClosure () {
	var x = 4;
	function closeX (){

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Hoisting - Concept of program load order

First, memory is set aside for all necessary variables and declared functions.

// How a function is built by humans
function sumOfSquares (a, b) {
  
  var x = add(a*a, b*b);
 return x;

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<?php

/**
* Custom configuration bootstrap file for ExpressionEngine
*
* Place config.php in your site root
* Add require(realpath(dirname(__FILE__) . '/../../config_bootstrap.php')); to the bottom of system/expressionengine/config/config.php
* Add require(realpath(dirname(__FILE__) . '/../../config_bootstrap.php')); to the bottom of system/expressionengine/config/database.php
* If you have moved your site root you'll need to update the require_once path
*

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# New

/usr/local/bin
/usr/bin
/bin
/usr/local/sbin
/usr/sbin
/sbin

# Default