javascript 删除除破折号以外的非数字字符
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Remove non numeric characters except dash
提问by user3142695
I need to remove all non numeric characters except the dash. This is my attempt (based on: Regex to get all alpha numeric fields except for comma, dash and single quote):
我需要删除除破折号以外的所有非数字字符。这是我的尝试（基于：正则表达式获取除逗号、破折号和单引号之外的所有字母数字字段）：
var stripped = mystring.replace(/[-0-9]+/g, '');
But that doesn't work :-(
但这不起作用:-(
回答by David says reinstate Monica
I'd suggest:
我建议：
var stripped = string.replace(/[^0-9\-]/g,'');
^in the character class (within the [and ]) is the NOT operator, so it matches characters which are not0-9or the (escaped) -character.
^在字符类中（在[and 内]）是 NOT 运算符，因此它匹配不是0-9或（转义）-字符的字符。
As noted in the comment to this answer, by Ted Hopp, it's not necessary to escape the -when it's the last character, but I habitually do so in order to save having to remember that proviso.
正如Ted Hopp在对这个答案的评论中所指出的，-当它是最后一个字符时没有必要转义，但我习惯性地这样做是为了省去记住那个附带条件。
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