javascript array includes array code example

Example 1: javascript array contains

var colors = ["red", "blue", "green"];
var hasRed = colors.includes("red"); //true
var hasYellow = colors.includes("yellow"); //false

Example 2: angular one array contains any of second

const found = arr1.some(r=> arr2.includes(r))

Example 3: js array includes

[1, 2, 3].includes(2);     // true
[1, 2, 3].includes(4);     // false
[1, 2, 3].includes(3, 3);  // false
[1, 2, 3].includes(3, -1); // true
[1, 2, NaN].includes(NaN); // true

Example 4: array includes

let storyWords = ['extremely', 'literally', 'actually', 'hi', 'bye', 'okay']
let unnecessaryWords = ['extremely', 'literally', 'actually' ];

let betterWords = storyWords.filter(function(word) {
  return !unnecessaryWords.includes(word);
});
console.log(betterWords) // ['hi' 'bye' 'okay]

Example 5: see if array contains array javascript

const found = arr1.some(r=> arr2.indexOf(r) >= 0)

Example 6: JavaScript Array Methods includes()

const list = [1, 2, 3, 4, 5, 5, 23, 21, 1231, 2434, 443546456, 17];
console.log(list.includes(4));
// --> true