不要在比賽

Question

我想在一個字符串像

string = 'The value is ij35dss. The value is fsd53fdsfds.'

，我想是這樣string.match(/The value is (.*?)\./g); 只返回['ijdss','fsdfdsfds']，而不是['The value is ijdss.', 'The value is fsdfdsfds.']

Answer 1

使用RegExp.exec改爲運行正則表達式字符串，這裏是一個樣本：

var string = 'The value is ij35dss. The value is fsd53fdsfds.'; 
var re = new RegExp(/The value is (.*?)\./g) 

var strs = [] 
var m = re.exec(string) 

while(m != null) { 
    strs.push(m[1]); 
    m = re.exec(string) 
} 

alert(strs) 

和的jsfiddle：

• http://jsfiddle.net/WtTPd/

如果你認爲你會需要這個時候，你可以將它添加到String.prototype：

String.prototype.matchGroup = function(re, group) { 
    var m = re.exec(string); 
    var strs = []; 
    while(m != null) { 
    strs.push(m[group]); 
    m = re.exec(string); 
    } 
    return strs; 
} 

var string = 'The value is ij35dss. The value is fsd53fdsfds.'; 
alert(string.matchGroup(/The value is (.*?)\./g, 1)); 

的jsfiddle：

• http://jsfiddle.net/WtTPd/1/
個

現金

• How do you access the matched groups in a JavaScript regular expression?