feat(collections): Add associatewith

[getspooky]

Builds a new Record using the given array as keys and choosing a value for each key using the given selector.

import { associateWith } from "https://deno.land/std@$STD_VERSION/collections/mod.ts";
import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts";

const names = ["Kim", "Lara", "Jonathan"];
const namesToLength = associateWith(names, (it) => it.length);

assertEquals(namesToLength, {
  "Kim": 3,
  "Lara": 4,
  "Jonathan": 8,
});

Related #1173

[LionC]

Thanks for the implementation! I left some comments :-)

[kt3k]

@getspooky Nice work! LGTM

[kt3k]

I'll wait a while before merging to see if there's any inputs, opinions on this because this item looks comparatively new in the proposed list.

[getspooky]

I think something went wrong with test :

error: TS2551 [ERROR]: Property 'Signal' does not exist on type 'typeof Deno'. 'Deno.Signal' is an unstable API. Did you forget to run with the '--unstable' flag, or did you mean 'signal'?

[kt3k]

@getspooky That CI error is going to be resolved in #1211, but we can't merge that fix right now because that will break stable CI. So let's just ignore canary CI for now.

[LionC]

@kt3k can we merge this before the upcoming release?

[kt3k]

@LionC Thank you for the ping! Let's merge it.

@getspooky Thanks again for the work!