findIndex

Finds the index of a given element in an array.

Signature

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findIndex<T>(arr: T[], element: T): number

Type Parameters

• T

Parameters

• arr: T[] - The array in which to find the element.
• element: T - The element to find.

Returns

number - The index of the element in the array, or -1 if the element is not found.

Example

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const arr = [1, 2, 3, 4, 5]
const element = 3
const index = findIndex(arr, element)
console.log(index) // 2

Source

Defined in array.ts:53