91 lines
2.0 KiB
Markdown
91 lines
2.0 KiB
Markdown
|
---
|
||
|
|
id: 5c3dda8b4d8df89bea71600f
|
||
|
|
title: 檢查混合字符組
|
||
|
|
challengeType: 1
|
||
|
|
forumTopicId: 301339
|
||
|
|
dashedName: check-for-mixed-grouping-of-characters
|
||
|
|
---
|
||
|
|
|
||
|
|
# --description--
|
||
|
|
|
||
|
|
有時候我們想使用正則表達式裏的括號 `()` 來檢查字符組。
|
||
|
|
|
||
|
|
如果想在字符串找到 `Penguin` 或 `Pumpkin`，可以用這個正則表達式：`/P(engu|umpk)in/g`。
|
||
|
|
|
||
|
|
然後使用 `test()` 方法檢查 test 字符串裏面是否包含字符組。
|
||
|
|
|
||
|
|
```js
|
||
|
|
let testStr = "Pumpkin";
|
||
|
|
let testRegex = /P(engu|umpk)in/;
|
||
|
|
testRegex.test(testStr);
|
||
|
|
```
|
||
|
|
|
||
|
|
`test` 方法會返回 `true`。
|
||
|
|
|
||
|
|
# --instructions--
|
||
|
|
|
||
|
|
完善正則表達式，使其以區分大小寫的方式檢查 `Franklin Roosevelt` 或 `Eleanor Roosevelt` 的名字，並且應該忽略 middle names。
|
||
|
|
|
||
|
|
然後完善代碼，使創建的正則檢查 `myString`，根據正則是否匹配返回 `true` 或 `false`。
|
||
|
|
|
||
|
|
# --hints--
|
||
|
|
|
||
|
|
正則 `myRegex` 測試 `Franklin D. Roosevelt` 應該返回 `true`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
myRegex.lastIndex = 0;
|
||
|
|
assert(myRegex.test('Franklin D. Roosevelt'));
|
||
|
|
```
|
||
|
|
|
||
|
|
正則 `myRegex` 測試 `Eleanor Roosevelt` 應該返回 `true`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
myRegex.lastIndex = 0;
|
||
|
|
assert(myRegex.test('Eleanor Roosevelt'));
|
||
|
|
```
|
||
|
|
|
||
|
|
正則 `myRegex` 測試 `Franklin Rosevelt` 應該返回 `false`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
myRegex.lastIndex = 0;
|
||
|
|
assert(!myRegex.test('Franklin Rosevelt'));
|
||
|
|
```
|
||
|
|
|
||
|
|
正則 `myRegex` 測試 `Frank Roosevelt` 應該返回 `false`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
myRegex.lastIndex = 0;
|
||
|
|
assert(!myRegex.test('Frank Roosevelt'));
|
||
|
|
```
|
||
|
|
|
||
|
|
你應該使用 `.test()` 方法來檢測正則表達式。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(code.match(/myRegex.test\(\s*myString\s*\)/));
|
||
|
|
```
|
||
|
|
|
||
|
|
你的返回結果應該爲 `true`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(result === true);
|
||
|
|
```
|
||
|
|
|
||
|
|
# --seed--
|
||
|
|
|
||
|
|
## --seed-contents--
|
||
|
|
|
||
|
|
```js
|
||
|
|
let myString = "Eleanor Roosevelt";
|
||
|
|
let myRegex = /False/; // Change this line
|
||
|
|
let result = false; // Change this line
|
||
|
|
// After passing the challenge experiment with myString and see how the grouping works
|
||
|
|
```
|
||
|
|
|
||
|
|
# --solutions--
|
||
|
|
|
||
|
|
```js
|
||
|
|
let myString = "Eleanor Roosevelt";
|
||
|
|
let myRegex = /(Franklin|Eleanor).*Roosevelt/;
|
||
|
|
let result = myRegex.test(myString);
|
||
|
|
```
|