Javascript Array some(), of(). Object in()

 

Array.prototype.some()

const array = [1, 2, 3, 4, 5];

// checks whether an element is even

const even = (element) => element % 2 === 0;

console.log(array.some(even));

// expected output: true

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some

for...of

const array1 = ['a', 'b', 'c'];

for (const element of array1) {

  console.log(element);

}

// expected output: "a"

// expected output: "b"

// expected output: "c"

Object

JavaScript Demo: Statement - For...In

const object = { a: 1, b: 2, c: 3 };

for (const property in object) {

  console.log(`${property}: ${object[property]}`);

}

// expected output:

// "a: 1"

// "b: 2"

// "c: 3"

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some