Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | 8x 8x 8x 8x 4x 8x 3x 7x 16x 2x 2x 4x 4x 2x 2x 2x 8x 8x 1x 8x 8x | import { purry } from './purry';
import { Pred, PredIndexedOptional, PredIndexed } from './_types';
import { _toLazyIndexed } from './_toLazyIndexed';
import { _toSingle } from './_toSingle';
/**
* 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 function findIndex<T>(array: readonly T[], fn: Pred<T, boolean>): number;
export function findIndex<T>(
fn: Pred<T, boolean>
): (array: readonly T[]) => number;
export function findIndex() {
return purry(_findIndex(false), arguments, findIndex.lazy);
}
const _findIndex = (indexed: boolean) => <T>(
array: T[],
fn: PredIndexedOptional<T, boolean>
) => {
Iif (indexed) {
return array.findIndex(fn);
}
return array.findIndex(x => fn(x));
};
const _lazy = (indexed: boolean) => <T>(
fn: PredIndexedOptional<T, boolean>
) => {
let i = 0;
return (value: T, index?: number, array?: T[]) => {
const valid = indexed ? fn(value, index, array) : fn(value);
if (valid) {
return {
done: true,
hasNext: true,
next: i,
};
}
i++;
return {
done: false,
hasNext: false,
};
};
};
export namespace findIndex {
export function indexed<T>(
array: readonly T[],
fn: PredIndexed<T, boolean>
): T | undefined;
export function indexed<T>(
fn: PredIndexed<T, boolean>
): (array: readonly T[]) => T | undefined;
export function indexed() {
return purry(_findIndex(true), arguments, findIndex.lazyIndexed);
}
export const lazy = _toSingle(_lazy(false));
export const lazyIndexed = _toSingle(_toLazyIndexed(_lazy(true)));
}
|