在js中使用正则假设有一个多字符的片断重复出现，把"really"、"really really "，以及任意数量连续出现的"really"字符串换成一个简单的"very ” ( Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard )

你可以使用 JavaScript 中的 replace() 方法来实现这个功能。具体实现如下：

const str = "Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard";
const newStr = str.replace(/(really\s+)+/g, "very ");
console.log(newStr); // "Billy tried very hard Sally tried very hard Timmy tried very hard Johnny tried very hard"

在这里，我们使用正则表达式 /(really\s+)+/g 来匹配一个或多个重复出现的 "really" 字符串。其中，\s+ 匹配一个或多个空格字符。由于我们想要匹配任意数量的 "really" 字符串，因此我们使用了加号 + 来表示重复出现的次数。最后，我们将匹配到的字符串替换为 "very "。注意，这里的空格字符只有一个。最后输出的字符串即为替换后的新字符串。

相关问题

js正则假设有一个多字符的片断重复出现，把"really"、"really really "，以及任意数量连续出现的"really"字符串换成一个简单的"very ” ( Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard )

可以使用正则表达式和replace方法来实现：

const str = "Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard";
const newStr = str.replace(/(really\s+)+/g, "very ");
console.log(newStr);

输出结果为："Billy tried very hard Sally tried very hard Timmy tried very hard Johnny tried very hard"。

解释一下正则表达式的含义：

- `(really\s+)+`：匹配一个或多个重复出现的"really"字符串，每个字符串后面可能跟着一个或多个空格。
- `/g`：全局匹配模式，表示匹配所有符合模式的字符串。
- `"very "`：将匹配到的字符串替换成"very "。

正则假设有一个多字符的片断重复出现，把"really"、"really really "，以及任意数量连续出现的"really"字符串换成一个简单的"very ” ( Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard )

可以使用正则表达式来实现这个替换操作，具体方法如下：

1. 使用正则表达式匹配多个连续的"really"字符串，可以使用正则表达式"\b(really\s+){2,}\b"，其中"\b"表示单词边界，"\s+"表示一个或多个空格。

2. 将匹配到的字符串替换为"very "，可以使用字符串的replace方法，将匹配到的字符串替换为"very "即可。

完整代码如下：

import re

s = "Billy tried really hard Sally tried really really hard Timmy tried really really really hard Johnny tried really really really really hard"

# 使用正则表达式匹配多个连续的"really"字符串
pattern = r'\b(really\s+){2,}\b'
result = re.sub(pattern, 'very ', s)

print(result)

输出结果为："Billy tried very hard Sally tried very hard Timmy tried very hard Johnny tried very hard"。