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// === Arrays

var [a, b] = [1, 2];
console.log(a, b);
//=> 1 2


// Use from functions, only select from pattern
var foo = () => [1, 2, 3];

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call bind and apply: are methods that can be used to assign an object to the this keyword

When a function uses the this keyword in its body, its value can be bound to a particular object during the call using the call and apply methods.

Example 1

function add(c,d){
  return this.a + this.b + c + d;
}

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/string/ --> matches the full string

/string/i --> case insenstive match

/string|anotherstring/ --> matches to all options

.test() --> returns a boolean

.match() --> returns the matched strings