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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Options for joinToString */export type JoinToStringOptions = {  separator?: string;  prefix?: string;  suffix?: string;  limit?: number;  truncated?: string;};
/** * Transforms the elements in the given array to strings using the given * selector. Joins the produced strings into one using the given `separator` * and applying the given `prefix` and `suffix` to the whole string afterwards. * If the array could be huge, you can specify a non-negative value of `limit`, * in which case only the first `limit` elements will be appended, followed by * the `truncated` string. Returns the resulting string. * * @example * ```ts * import { joinToString } from "https://deno.land/std@$STD_VERSION/collections/join_to_string.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts"; * * const users = [ *   { name: "Kim" }, *   { name: "Anna" }, *   { name: "Tim" }, * ]; * * const message = joinToString(users, (it) => it.name, { *   suffix: " are winners", *   prefix: "result: ", *   separator: " and ", *   limit: 1, *   truncated: "others", * }); * * assertEquals(message, "result: Kim and others are winners"); * ``` */export function joinToString<T>(  array: readonly T[],  selector: (el: T) => string,  {    separator = ",",    prefix = "",    suffix = "",    limit = -1,    truncated = "...",  }: Readonly<JoinToStringOptions> = {},): string {  let result = "";
  let index = -1;  while (++index < array.length) {    const el = array[index];
    if (index > 0) {      result += separator;    }
    if (limit > -1 && index >= limit) {      result += truncated;      break;    }
    result += selector(el);  }
  result = prefix + result + suffix;
  return result;}