JavaScript 正则表达式用一个替换重复的字符
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JavaScript regex to replace repeated characters with one
提问by Steve
I'm trying to replace some repeated characters using regex:
我正在尝试使用正则表达式替换一些重复的字符：
var string = "80--40";
string = string.replace(/-{2}/g,"-"); // result is "80-40"
This replaces two minuses with one, but how could I change the code so that it replaces two or more? I only want one minus symbol to appear between the numbers.
这用一个替换了两个减号，但是我如何更改代码以替换两个或多个？我只希望数字之间出现一个减号。
回答by Digital Plane
Change it to:
将其更改为：
string = string.replace(/-{2,}/g,"-");
Another way is
另一种方式是
string = string.replace(/-+/g,"-");
as that replaces any one or more instances of -with only one -.
因为-它只用一个-.
回答by Noobish
{2}matches exactly two, +matches one or more.
{2}正好匹配两个，+匹配一个或多个。
string = string.replace(/\-+/g, '-');
For more on RegEx, See the MDN documentation
有关 RegEx 的更多信息，请参阅 MDN 文档
回答by Facebook Staff are Complicit
You can specify {x, y}to match any number of repetitions between xand y. You can also leave off the upper or lower bound, so use {2,}instead of {2}to replace any matches that occur at least two times.
您可以指定{x, y}在x和之间匹配任意数量的重复y。您也可以不设置上限或下限，因此使用{2,}而不是{2}替换至少出现两次的任何匹配项。
