8 JAVASCRIPT ARRAY Methods for Beginner

1. PUSH The push() method adds new elements to the end of an array and returns the new length.

const arr = ["The", "coding"];
arr.push("Master");

//["The", "Coding", "Master"]

1. SLICE The slice() method selects a part of an array and returns the new array.

const arr = ["The", "Coding", "Master"];
arr.slice(1,2);

//["Coding", "Master"]

1. TOSTRING The toString() methods converts an array to a string, and returns the result.

const arr = ["The", "Coding", "Master"];
arr.tostring();

//"The, Coding, Master"

1. SHIFT The shift() method removes the first element of the array and returns that element.

const arr = ["The", "Coding", "Master"];
arr.shift();

//["Coding", "Master"]

1. MAP The map() method creates a new array with the result of calling a function of every array element.

const arr = [1, 4, 9, 16];
arr.map( x => x * 2);

//[2, 8, 16, 32]

1. POP The pop() method removes the last element of an array and returns that element.

const arr = ["The", "Coding", "Master"];
arr.pop();

///["The", "Coding"]

1. FILTER The filter() method creates an array filled with all array elements that pass a test (provided as a function).

const arr = ["The", "Coding", "Master"];
arr.filter(word =>word.length > 3);

//["Coding", "Master"]

1. INCLUDES The includes() determines whether an array contains s specified element.

const arr = ["The", "Coding", "Master"];
arr.includes("Coding");

//true