40 lines
1.4 KiB
Markdown
40 lines
1.4 KiB
Markdown
|
---
|
|||
|
|
title: Match Numbers and Letters of the Alphabet
|
|||
|
|
localeTitle: 匹配数字和字母的字母
|
|||
|
|
---
|
|||
|
|
## 匹配数字和字母的字母
|
|||
|
|
|
|||
|
|
在此挑战中，系统会要求您返回从字符串中提取的数字和字母的集合。我们的目标是创建一个单一的正则表达式，捕获h和s之间的字母范围，以及2到6之间的数字。
|
|||
|
|
|
|||
|
|
### 提示1：
|
|||
|
|
|
|||
|
|
你在使用match（）方法吗？如果是这样，那么你是否从适当的变量调用方法？即
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
let input_string = "The string you are testing on"
|
|||
|
|
let yourRegExp = /[hs]/;
|
|||
|
|
let correct_result = input_string.match(yourRegExp); // passes - returns characters H to S
|
|||
|
|
|
|||
|
|
let incorrect_result = yourRegExp.match(input_string); // fails - .match() is not a function
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 提示2：
|
|||
|
|
|
|||
|
|
您是否记得启用正则表达式标志，例如“i”表示忽略大小写，而“g”表示是否可以检索多个值？如果是这样，那么你是否包括数字和字母的字符大小写匹配？
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
let regexp = /[a-z1-100]/ig
|
|||
|
|
// above code returns all characters from A to Z, along with all numbers from 1 to 100
|
|||
|
|
// this includes the letter A and Z and the numbers 1 and 100
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 扰流警报 - 提前解决
|
|||
|
|
|
|||
|
|
## 解
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
let quoteSample = "Blueberry 3.141592653s are delicious.";
|
|||
|
|
let myRegex = /[h-s2-6]/ig; // Change this line
|
|||
|
|
let result = quoteSample.match(myRegex); // Change this line
|
|||
|
|
|
|||
|
|
```
|