/**
 * Returns all elements in the given collection, sorted stably by their result using the given selector. The selector function is called only once for each element.
 *
 * Example:
 *
 * ```ts
 * import { sortBy } from "https://deno.land/std@$STD_VERSION/collections/mod.ts"
 * import { assertEquals } from "https://deno.land/std@$STD_VERSION/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 declare function sortBy<T>(array: readonly T[], selector: ((el: T) => number)): T[];
export declare function sortBy<T>(array: readonly T[], selector: ((el: T) => string)): T[];
export declare function sortBy<T>(array: readonly T[], selector: ((el: T) => bigint)): T[];
export declare function sortBy<T>(array: readonly T[], selector: ((el: T) => Date)): T[];