[英]JavaScript - extract using regex group
Is it possible to extract a regex group value pattern of a string? 是否可以提取字符串的正则表达式组值模式?
For example, the following code gives 例如,以下代码给出
var str = "alpha bravo charlie delta";
var regex = /\s(\w+)\s(\w+)/
var value = str.replace(regex, "$1_$2"); // Gives alphabravo_charlie delta
What I am looking for is something like, 我正在寻找的是类似的东西,
var value = str.extract(regex, "$1_$2"); // Which should give bravo_charlie
While str.extract
doesn't exist, is there any other way I can get same results? 虽然
str.extract
不存在,还有其他方法可以得到相同的结果吗?
You can do this: 你可以这样做:
var str = "alpha bravo charlie delta";
var regex = /\s(\w+)\s(\w+)/;
var value = "";
str.replace(regex, function($0, $1, $2){
value = $1 + "_" + $2;
});
alert(value);
您可以使用String.match()
var array = str.match(regex);
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