返回 Javascript 中正则表达式 match() 的位置?
2022-08-30 01:10:12
有没有办法在Javascript中检索正则表达式match()结果字符串中的(起始)字符位置?
有没有办法在Javascript中检索正则表达式match()结果字符串中的(起始)字符位置?
exec
返回一个具有属性的对象:index
var match = /bar/.exec("foobar");
if (match) {
console.log("match found at " + match.index);
}
对于多场比赛:
var re = /bar/g,
str = "foobarfoobar";
while ((match = re.exec(str)) != null) {
console.log("match found at " + match.index);
}
以下是我想出的:
// Finds starting and ending positions of quoted text
// in double or single quotes with escape char support like \" \'
var str = "this is a \"quoted\" string as you can 'read'";
var patt = /'((?:\\.|[^'])*)'|"((?:\\.|[^"])*)"/igm;
while (match = patt.exec(str)) {
console.log(match.index + ' ' + patt.lastIndex);
}