87 lines
4.3 KiB
Markdown
87 lines
4.3 KiB
Markdown
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---
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id: acda2fb1324d9b0fa741e6b5
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title: Confirm the Ending
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Check if a string (first argument, <code>str</code>) ends with the given target string (second argument, <code>target</code>).
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This challenge <em>can</em> be solved with the <code>.endsWith()</code> method, which was introduced in ES2015. But for the purpose of this challenge, we would like you to use one of the JavaScript substring methods instead.
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Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: '<code>confirmEnding("Bastian", "n")</code> should return true.'
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testString: 'assert(confirmEnding("Bastian", "n") === true, ''<code>confirmEnding("Bastian", "n")</code> should return true.'');'
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- text: '<code>confirmEnding("Congratulation", "on")</code> should return true.'
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testString: 'assert(confirmEnding("Congratulation", "on") === true, ''<code>confirmEnding("Congratulation", "on")</code> should return true.'');'
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- text: '<code>confirmEnding("Connor", "n")</code> should return false.'
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testString: 'assert(confirmEnding("Connor", "n") === false, ''<code>confirmEnding("Connor", "n")</code> should return false.'');'
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- text: '<code>confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification")</code> should return false.'
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testString: 'assert(confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification") === false, ''<code>confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification")</code> should return false.'');'
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- text: '<code>confirmEnding("He has to give me a new name", "name")</code> should return true.'
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testString: 'assert(confirmEnding("He has to give me a new name", "name") === true, ''<code>confirmEnding("He has to give me a new name", "name")</code> should return true.'');'
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- text: '<code>confirmEnding("Open sesame", "same")</code> should return true.'
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testString: 'assert(confirmEnding("Open sesame", "same") === true, ''<code>confirmEnding("Open sesame", "same")</code> should return true.'');'
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- text: '<code>confirmEnding("Open sesame", "pen")</code> should return false.'
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testString: 'assert(confirmEnding("Open sesame", "pen") === false, ''<code>confirmEnding("Open sesame", "pen")</code> should return false.'');'
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- text: '<code>confirmEnding("Open sesame", "game")</code> should return false.'
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testString: 'assert(confirmEnding("Open sesame", "game") === false, ''<code>confirmEnding("Open sesame", "game")</code> should return false.'');'
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- text: '<code>confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain")</code> should return false.'
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testString: 'assert(confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain") === false, ''<code>confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain")</code> should return false.'');'
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- text: '<code>confirmEnding("Abstraction", "action")</code> should return true.'
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testString: 'assert(confirmEnding("Abstraction", "action") === true, ''<code>confirmEnding("Abstraction", "action")</code> should return true.'');'
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- text: Do not use the built-in method <code>.endsWith()</code> to solve the challenge.
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testString: 'assert(!(/\.endsWith\(.*?\)\s*?;?/.test(code)) && !(/\[''endsWith''\]/.test(code)), ''Do not use the built-in method <code>.endsWith()</code> to solve the challenge.'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function confirmEnding(str, target) {
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// "Never give up and good luck will find you."
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// -- Falcor
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return str;
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}
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confirmEnding("Bastian", "n");
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function confirmEnding(str, target) {
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return str.substring(str.length - target.length) === target;
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}
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confirmEnding("Bastian", "n");
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```
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</section>
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