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freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.md
Nicholas Carrigan (he/him) 7117919d36 chore(learn): audit javascript algorithms and data structures (#41092)
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Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com>
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2021-03-02 17:12:12 -07:00

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id, title, challengeType, forumTopicId, dashedName
id title challengeType forumTopicId dashedName
587d7db7367417b2b2512b9e Match Ending String Patterns 1 301352 match-ending-string-patterns

--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);
let noEnding = "Sometimes a story will have to end";
storyRegex.test(noEnding);

The first test call would return true, while the second would return false.

--instructions--

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

--hints--

You should search for caboose with the dollar sign $ anchor in your regex.

assert(lastRegex.source == 'caboose$');

Your regex should not use any flags.

assert(lastRegex.flags == '');

You should match caboose at the end of the string The last car on a train is the caboose

assert(lastRegex.test('The last car on a train is the caboose'));

--seed--

--seed-contents--

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

--solutions--

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