javascript - 有没有办法获得分组结果以及所有匹配的正则表达式字符串

Question

我想获取正则表达式匹配的结果以及组匹配

输入字符串:

  var str= ' application [<!ENTITY % common  SYSTEM "../common.ent">\n%common;] <!ENTITY % name PUBLIC "public_ID" "URI">'

正则表达式:

   var rg = /<!ENTITY\s+[\%|\&]?\s*(\S+)\s+(PUBLIC|SYSTEM)\s+"([^"]*)"\s*(?:"([^"]*)"\s*)?>/g

正在申请

str.match(rg)

仅结果为匹配字符串:

["<!ENTITY % common  SYSTEM "../common.ent">", "<!ENTITY % name PUBLIC "public_ID" "URI">"]

如何获取分组匹配结果？

例如，在这种情况下，我期待这样的事情:

[{
   matched : "<!ENTITY % common  SYSTEM "../common.ent">",
   groups : ["common", "SYSTEM", "../common.ent"]
}, {
   matched : "<!ENTITY % name PUBLIC "public_ID" "URI">",
   groups : ["name", "PUBLIC", "public_ID", "URI"]
}]

编辑:只是有点好奇 regex101.com 是如何做到的显示此

引用号:http://regex101.com/r/oU0qN5/1

Answer 1

在一次调用中不可能在 JavaScript 中，你必须在循环中调用它

var str= ' application [<!ENTITY % common  SYSTEM "../common.ent">\n%common;] <!ENTITY % name PUBLIC "public_ID" "URI">';
var rg = /<!ENTITY\s+[\%|\&]?\s*(\S+)\s+(PUBLIC|SYSTEM)\s+"([^"]*)"\s*(?:"([^"]*)"\s*)?>/g;

var result;
var results = [];
while(result = rg.exec(str)){
  results.push(result);
}

// this part and they join is just to display the result
document.getElementById("result").innerText = results.join("@@@@");
document.getElementById("result").innerHTML =     document.getElementById("result").innerHTML.replace("@@@@","<br/>");

// tested with Win7 Chrome 38+

<div id="result"></div>

不是你想要的结构，但像这样它可以在 Javascript 中完成