MickS
0
Q:

js array includes

var colors = ["red", "blue", "green"];
var hasRed = colors.includes("red"); //true
var hasYellow = colors.includes("yellow"); //false
48

var fruits = ["Banana", "Orange", "Apple", "Mango"];

var n = fruits.includes("Mango");
 
10
const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));
// output: true
20
[1, 2, 3].includes(2);     // true
[1, 2, 3].includes(4);     // false
[1, 2, 3].includes(1, 2);  // false (second parameter is the index position in this array at which to begin searching)
4
[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
2
 var fruits = ["Apple", "Banana", "Mango", "Orange", "Papaya"];
    
    // Check if a value exists in the fruits array
    if(fruits.indexOf("Mango") !== -1){
        alert("Value exists!")
    } else{
        alert("Value does not exists!")
    }
0
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]
5
//Check if an array includes "Banana", starting the search at position 3:
var fruits = ["Banana", "Orange", "Apple", "Mango"];

var n = fruits.includes("Banana", 3);
 
1
const array1 = [1, 2, 3];

console.log(array1.includes(2));
// expected output: true

const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));
// expected output: true

console.log(pets.includes('at'));
// expected output: false
0

var str = "Hello world, welcome to the universe.";

var n = str.includes("world");
 
12

New to Communities?

Join the community