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@std/collections@0.215.0

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It is unknown whether this package works with Browsers
It is unknown whether this package works with Deno
It is unknown whether this package works with Node.js
It is unknown whether this package works with Cloudflare Workers
It is unknown whether this package works with Bun
•JSR Score70%•
Downloads1/wk
•
Published2 years ago (0.215.0)
function firstNotNullishOf
firstNotNullishOf<T, O>(
array: Iterable<T>,
selector: (item: T) => O | undefined | null
): NonNullable<O> | undefined

Applies the given selector to elements in the given array until a value is produced that is neither null nor undefined and returns that value. Returns undefined if no such value is produced.

Examples

Example 1

import { firstNotNullishOf } from "@std/collections/first_not_nullish_of";
import { assertEquals } from "@std/assert/assert_equals";

const tables = [
  { number: 11, order: null },
  { number: 12, order: "Soup" },
  { number: 13, order: "Salad" },
];
const nextOrder = firstNotNullishOf(tables, (it) => it.order);

assertEquals(nextOrder, "Soup");

Type Parameters

T
O

Parameters

array: Iterable<T>
selector: (item: T) => O | undefined | null

Return Type

NonNullable<O> | undefined

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Add Package

deno add jsr:@std/collections

Import symbol

import { firstNotNullishOf } from "@std/collections";
or

Import directly with a jsr specifier

import { firstNotNullishOf } from "jsr:@std/collections";