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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
/** * Returns all elements in the given collection, sorted stably by their result using the given selector * * Example: * * ```ts * import { sortBy } from "./sort_by.ts" * import { assertEquals } from "../testing/asserts.ts"; * * const people = [ *     { name: 'Anna', age: 34 }, *     { name: 'Kim', age: 42 }, *     { name: 'John', age: 23 }, * ] * const sortedByAge = sortBy(people, it => it.age) * * assertEquals(sortedByAge, [ *     { name: 'John', age: 23 }, *     { name: 'Anna', age: 34 }, *     { name: 'Kim', age: 42 }, * ]) * ``` */export function sortBy<T>(  array: readonly T[],  selector:    | ((el: T) => number)    | ((el: T) => string)    | ((el: T) => bigint)    | ((el: T) => Date),): T[] {  return Array.from(array).sort((a, b) => {    const selectedA = selector(a);    const selectedB = selector(b);
    if (typeof selectedA === "number") {      if (Number.isNaN(selectedA)) {        return 1;      }
      if (Number.isNaN(selectedB)) {        return -1;      }    }
    if (selectedA > selectedB) {      return 1;    }
    if (selectedA < selectedB) {      return -1;    }
    return 0;  });}