114 lines
2.9 KiB
Markdown
114 lines
2.9 KiB
Markdown
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---
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id: acda2fb1324d9b0fa741e6b5
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title: 末尾の一致判定
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challengeType: 5
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forumTopicId: 16006
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dashedName: confirm-the-ending
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---
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# --description--
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文字列 (最初の引数、`str`) が与えられたターゲット文字列 (2 番目の引数、`target`) で終わるかどうかを確認してください。
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このチャレンジは ES2015 で導入された `.endsWith()` メソッドを使用すれば*解決できます*。 しかし、ここでは代わりに JavaScript の substring メソッドを使用してください。
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# --hints--
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`confirmEnding("Bastian", "n")` は `true` を返す必要があります。
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```js
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assert(confirmEnding('Bastian', 'n') === true);
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```
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`confirmEnding("Congratulation", "on")`は `true` を返す必要があります。
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```js
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assert(confirmEnding('Congratulation', 'on') === true);
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```
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`confirmEnding("Connor", "n")` は `false` を返す必要があります。
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```js
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assert(confirmEnding('Connor', 'n') === false);
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```
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`confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification")` は `false` を返す必要があります。
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```js
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assert(
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confirmEnding(
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'Walking on water and developing software from a specification are easy if both are frozen',
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'specification'
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) === false
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);
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```
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`confirmEnding("He has to give me a new name", "name")` は `true` を返す必要があります。
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```js
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assert(confirmEnding('He has to give me a new name', 'name') === true);
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```
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`confirmEnding("Open sesame", "same")` は `true` を返す必要があります。
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```js
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assert(confirmEnding('Open sesame', 'same') === true);
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```
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`confirmEnding("Open sesame", "sage")` は `false` を返す必要があります。
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```js
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assert(confirmEnding('Open sesame', 'sage') === false);
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```
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`confirmEnding("Open sesame", "game")` は `false` を返す必要があります。
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```js
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assert(confirmEnding('Open sesame', 'game') === false);
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```
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`confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain")` は `false` を返す必要があります。
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```js
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assert(
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confirmEnding(
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'If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing',
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'mountain'
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) === false
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);
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```
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`confirmEnding("Abstraction", "action")` は `true` を返す必要があります。
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```js
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assert(confirmEnding('Abstraction', 'action') === true);
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```
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このチャレンジを解決するプログラムでは、組み込みメソッド `.endsWith()` を使用しないでください。
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```js
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assert(!/\.endsWith\(.*?\)\s*?;?/.test(code) && !/\['endsWith'\]/.test(code));
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```
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# --seed--
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## --seed-contents--
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```js
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function confirmEnding(str, target) {
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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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# --solutions--
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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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