如何从字符串中删除重复的 \n （换行符）并只保留一个？

Question

我有这样的字符串：

This is a sentence.\n This is sentence 2.\n\n\n\n\n\n This is sentence 3.\n\n And here is the final sentence.

我想要的是：

This is a sentence.\n This is sentence 2.\n This is sentence 3.\n And here is the final sentence.

我想从字符串中删除所有重复的 \n 字符，但只保留一个字符，是否可以像 javascript 中那样做？

Answer 1

您可以尝试将 \n{2,} 替换为单个 \n:

var input = "This is a sentence.\n This is sentence 2.\n\n\n\n\n\n This is sentence 3.\n\n And here is the final sentence.";
var output = input.replace(/\n{2,}\s*/g, '\n');
console.log(output);

Answer 2

您可以将正则表达式用作 /\n+/g 到 replace 它与单个 \n

const str =
  "This is a sentence.\n This is sentence 2.\n\n\n\n\n\n This is sentence 3.\n\n And here is the final sentence.";
const result = str.replace(/\n+/g, "\n");
console.log(result);

如何从字符串中删除重复的 \n （换行符）并只保留一个？

How to remove duplicate \n (line break) from a string and keep only one?

javascript

string

line-breaks