JavaScript String Array Object

1995 - invented by Brendan Eich

2015 - ES6 - From March 2017 all browsers fully complaint

String

let text = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

let length = text.length;

let char = text[0];

let char1 = text.charAt(0);

let char2 = text.charCodeAt(0)[

text.split(" ");

text.padStart();

text.padEnd();

text.trimStart()

text.trimEnd()

text.concat()

text.toUpperCase()

text.toLowerCase()

text.replace()

text.replaceAll()

text.substring()

text.slice()

Search Methods

String indexOf()

String lastIndexOf()

String search()

String match()

String matchAll()

String includes()

String startsWith()

String endsWith()

Array

var myArray = [];

myArray.from('abc')

myArray.push('abc');

myArray.pop();

myArray.length

myArray.sort()

myArray.reverse()

myArray.forEach(a=>{a*a})

myArray.map(a=>{a+"space"})

myArray.keys()

myArray.entries()

myArray.filter(condition)

myArray.reduce() 

myArray.includes('abc') 

myArray.find(condition)

myArray.indexOf('abc')

myArray.lastIndexOf('a')

myArray.every(condition)

myArray.some(condition)

myArray.reduce() - myArray.reduceRight() 

Object:

JavaScript built-in function JSON.parse() to convert the string into a JavaScript object

eg: const obj = JSON.parse(text);

The For Loop

for - loops through a block of code a number of times

for/in - loops through the properties of an object

for/of - loops through the values of an iterable object