ts-prime
Version:
A utility library for JavaScript and Typescript.
48 lines • 1.64 kB
TypeScript
import { Pred, PredIndexedOptional, PredIndexed } from './_types';
/**
* Returns the index of the first element in the array where predicate is true, and -1 otherwise.
* @param items - the array
* @param fn - the predicate
* @signature
* P.findIndex(items, fn)
* @signature
* P.findIndex(fn)(items)
* @example
* P.findIndex([1, 3, 4, 6], n => n % 2 === 0) // => 2
* P.pipe(
* [1, 3, 4, 6],
* P.findIndex(n => n % 2 === 0)
* ) // => 4
* @category Array, Pipe
*/
export declare function findIndex<T>(array: readonly T[], fn: Pred<T, boolean>): number;
export declare function findIndex<T>(fn: Pred<T, boolean>): (array: readonly T[]) => number;
export declare namespace findIndex {
function indexed<T>(array: readonly T[], fn: PredIndexed<T, boolean>): T | undefined;
function indexed<T>(fn: PredIndexed<T, boolean>): (array: readonly T[]) => T | undefined;
const lazy: (<T>(fn: PredIndexedOptional<T, boolean>) => (value: T, index?: number | undefined, array?: T[] | undefined) => {
done: boolean;
hasNext: boolean;
next: number;
} | {
done: boolean;
hasNext: boolean;
next?: undefined;
}) & {
single: true;
};
const lazyIndexed: (<T>(fn: PredIndexedOptional<T, boolean>) => (value: T, index?: number | undefined, array?: T[] | undefined) => {
done: boolean;
hasNext: boolean;
next: number;
} | {
done: boolean;
hasNext: boolean;
next?: undefined;
}) & {
indexed: true;
} & {
single: true;
};
}
//# sourceMappingURL=findIndex.d.ts.map