Difference between every() and some() methods in JavaScript

Here, we will see the difference between every() and some() methods in JavaScript.

Array.every() method

The Array.every() method in JavaScript is used to check whether all the elements of the array satisfy the given condition.

• Returns false if even one element does not satisfy the condition.
• Returns true only if all elements satisfy the condition.

Syntax:

// Arrow function
every((element) => { /* … */ })
every((element, index) => { /* … */ })
every((element, index, array) => { /* … */ })

Example: This example implements the every() method. 

// JavaScript code for every() function
function isodd(element, index, array) {
    return (element % 2 == 1);
}

function geeks() {
    let arr = [6, 1, 8, 32, 35];

    // check for odd number
    let value = arr.every(isodd);
    console.log(value);
}
geeks();

Array.some() method

The Array.some() method in JavaScript is used to check whether at least one of the elements of the array satisfies the given condition.

•  Returns true if at least one element satisfies the condition.
• Returns false if no elements satisfy the condition.

Syntax:

arr.some(callback(element,index,array),thisArg);

Example: This example implements the some() method. 

// JavaScript code for some() function
function isodd(element, index, array) {
    return (element % 2 == 1);
}

function geeks() {
    let arr = [6, 1, 8, 32, 35];

    // check for odd number
    let value = arr.some(isodd);
    console.log(value);
}
geeks();

Array.every() vs Array.some()