Javascript |无法将\ n替换为String.replace() [英] Javascript | Can't replace \n with String.replace()

问题描述

我有解析网站并从数据库中获取信息的代码. 看起来像这样:

I have code which parse web-site and take information from database. It's look like this:

var find = body.match(/\"text\":\"(.*?)\",\"date\"/);

结果，我有:

然后我尝试替换\ n，但是它不起作用.

Then i try to replace \n, but it's don't working.

var str = find[1].replace(new RegExp("\\n",'g'),"*");

我可以做什么?

推荐答案

您似乎想要替换文本\n，即反斜杠后跟n，而不是换行符.

It looks like you want to replace the text \n, i.e. a backslash followed by an n, as opposed to a newline character.

在这种情况下，您可以尝试

In which case you can try

var str = find[1].replace(/\\n/g, "*");

或可读性较低的版本

var str = find[1].replace(new RegExp("\\\\n", "g"), "*");

在正则表达式中，字符串\n与换行符匹配.要匹配反斜杠字符，我们需要在其前面加上另一个反斜杠来对其进行转义".正则表达式中的\\与\字符匹配.同样，在JavaScript字符串文字中，\是转义字符，因此我们在编写new RegExp("\\\\n", "g")时需要再次在正则表达式中转义两个反斜杠.

In regular expressions, the string \n matches a newline character. To match a backslash character we need to 'escape' it, by preceding it with another backslash. \\ in a regular expression matches a \ character. Similarly, in JavaScript string literals, \ is the escape character, so we need to escape both backslashes in the regular expression again when we write new RegExp("\\\\n", "g").

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