@bemoje/arr-index-of-first-where

Return the index of the first element of an array where the callback returns true. Returns -1 if none do.

Version

Travis CI

Dependencies

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Installation

npm install @bemoje/arr-index-of-first-where
npm install --save @bemoje/arr-index-of-first-where
npm install --save-dev @bemoje/arr-index-of-first-where

Usage

import arrIndexOfFirstWhere from '@bemoje/arr-index-of-first-where'

const arr = [1, 2, 3, 4, 5]

arrIndexOfFirstWhere(arr, (element) => {
	return element >= 3
})
//=> 2

arrIndexOfFirstWhere(arr, (element) => {
	return element >= 6
})
//=> -1

Tests

Uses Jest to test module functionality. Run tests to get coverage details.

npm run test

API

arrIndexOfFirstWhere

Return the index of the first element of an array where the callback returns true. Returns -1 if none do.

Parameters

• arr Array The array to iterate

• callback predicate The callback(element, index, array): boolean

Returns

any The first element to satisfy the condition

predicate

Type: Function

Parameters

• element any The current array element

• index number The current index

• array Array The array being itereated

Returns

boolean