freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.english.md

id, title, challengeType, isHidden, forumTopicId

id	title	challengeType	isHidden	forumTopicId
587d7db7367417b2b2512b9e	Match Ending String Patterns	1	false	301352

Description

In the last challenge, you learned to use the caret character to search for patterns at the beginning of strings. There is also a way to search for patterns at the end of strings. You can search the end of strings using the dollar sign character $ at the end of the regex.

let theEnding = "This is a never ending story";
let storyRegex = /story$/;
storyRegex.test(theEnding);
// Returns true
let noEnding = "Sometimes a story will have to end";
storyRegex.test(noEnding);
// Returns false

Instructions

Use the anchor character ($) to match the string "caboose" at the end of the string caboose.

Tests

tests:
  - text: You should search for <code>"caboose"</code> with the dollar sign <code>$</code> anchor in your regex.
    testString: assert(lastRegex.source == "caboose$");
  - text: Your regex should not use any flags.
    testString: assert(lastRegex.flags == "");
  - text: You should match <code>"caboose"</code> at the end of the string <code>"The last car on a train is the caboose"</code>
    testString: assert(lastRegex.test("The last car on a train is the caboose"));

Challenge Seed

let caboose = "The last car on a train is the caboose";
let lastRegex = /change/; // Change this line
let result = lastRegex.test(caboose);

Solution

let caboose = "The last car on a train is the caboose";
let lastRegex = /caboose$/; // Change this line
let result = lastRegex.test(caboose);