Array Methods

var example = ["hello", "there"];

// call example

example

// returns ["hello", "there"]

example.pop()

// pop() removes the last element of the array and returns it.
// returns "there"

example

// returns ["hello"]

// Let's add "there" back into the array

example.push("there")


// push() adds an element at the end and returns the arrays length.
// should return 2 (length of the array; how many elements in the array)

example

// returns ["hello", "there"]

example.shift()

// Shift removes the first element in the array and returns it.
// returns "hello"

example

// returns ["there"]

// Let's add "hello" back into the array

example.unshift("hello")

// unshift adds an element at the beginning and returns the arrays length.
// returns 2, the length of the array

example

// returns ["hello", "there"]

// join method, joins every element in the array.

example.join()

// each element inside the string will be separated by a comma by default.

// returns "hello,there"

example.join(", ");

// If we add an argument to the join() method we can change how it separates each element.
// every element will be separated by " " (space)
// returns "hello there"

example.join(", ");

// returns "hello, there"


example.indexOf("hello")

// indexOf returns the index if it matches an element.
// otherwise it returns -1
// returns 0, as "hello" is the first element of the array

example.indexOf("bye")

// returns -1, "bye" is not present in the array.

example.indexOf("there")

// returns 1