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Nicholas Carrigan (he/him) 3da4be21bb chore: seed chinese traditional (#42005)
Seeds the chinese traditional files manually so we can deploy to
staging.
2021-05-05 22:43:49 +05:30

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---
id: 587d7db5367417b2b2512b96
title: 匹配字母表中的字母
challengeType: 1
forumTopicId: 301354
dashedName: match-letters-of-the-alphabet
---
# --description--
瞭解瞭如何使用字符集(<dfn>character sets</dfn>)來指定要匹配的一組字符串,但是有時需要匹配大量字符(例如,字母表中的每個字母)。 有一種寫法可以讓實現這個功能變得簡短。
在字符集中,可以使用連字符(`-`)來定義要匹配的字符範圍。
例如,要匹配小寫字母 `a``e`,你可以使用 `[a-e]`
```js
let catStr = "cat";
let batStr = "bat";
let matStr = "mat";
let bgRegex = /[a-e]at/;
catStr.match(bgRegex);
batStr.match(bgRegex);
matStr.match(bgRegex);
```
按順序排列,三次 `match` 調用將返回值 `["cat"]``["bat"]``null`
# --instructions--
匹配字符串 `quoteSample` 中的所有字母。
**注意**:一定要同時匹配大小寫字母。
# --hints--
你的正則表達式 `alphabetRegex` 應該匹配 35 項。
```js
assert(result.length == 35);
```
你的正則表達式 `alphabetRegex` 應該使用全局標識。
```js
assert(alphabetRegex.flags.match(/g/).length == 1);
```
你的正則表達式 `alphabetRegex` 應該使用忽略大小寫標誌。
```js
assert(alphabetRegex.flags.match(/i/).length == 1);
```
# --seed--
## --seed-contents--
```js
let quoteSample = "The quick brown fox jumps over the lazy dog.";
let alphabetRegex = /change/; // Change this line
let result = alphabetRegex; // Change this line
```
# --solutions--
```js
let quoteSample = "The quick brown fox jumps over the lazy dog.";
let alphabetRegex = /[a-z]/gi; // Change this line
let result = quoteSample.match(alphabetRegex); // Change this line
```