findIndex()

can anyone explain findIndex in js how is the workflow in brief.

2 Replies

lko•3mo ago

const array1 = [5, 12, 8, 130, 44];

console.log(array1.findIndex((element) => element > 13));
// Expected output: 3

const array1 = [5, 12, 8, 130, 44];

console.log(array1.findIndex((element) => element > 13));
// Expected output: 3

.findIndex() looks inside array1, and for each element, it looks if element > 13, if it is, it returns its index

Joao•3mo ago

I strongly suggest looking using MDN for referencing JavaScript documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex

MDN Web Docs

Array.prototype.findIndex() - JavaScript | MDN

The findIndex() method of Array instances returns the index of the first element in an array that satisfies the provided testing function. If no elements satisfy the testing function, -1 is returned.

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findIndex()