findIndex | /mod.ts | rambda@9.2.1

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function findIndex

import { findIndex } from "https://deno.land/x/rambda@9.2.1/mod.ts";

findIndex<T>(predicate: (x: T) => boolean, list: T[]): number

It returns the index of the first element of list satisfying the predicate function.

findIndex<T>(predicate: (x: T) => boolean): (list: T[]) => number

It returns the index of the first element of list satisfying the predicate function.

If there is no such element, then -1 is returned.

Type Parameters

predicate: (x: T) => boolean

list: T[]

number

predicate: (x: T) => boolean

(list: T[]) => number