我有一组结构化数据到字符串中,我需要通过Javascript中的常规表达式迭代它。
这是数据的一个例子:
|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4
我需要解析它们并创建一个结构化对象(或数组),如下所示:
myObject.KEY1 = "VALUE 1"
myObject.KEY2 = "VALUE 2"
myObject.KEY3 = "OTHER VALUE WITH ANY CHARACTER LIKE SPACES, AND WHAT YOU WANT"
myObject.KEY4 = "VALUE4"
我已经获得了那个简单的正则表达式的密钥:[|](.+?)[|]
但我不知道如何遍历它们以及各自的值。
答案 0 :(得分:2)
我将假设一个键由表达式\|KEY[0-9]+\|
定义,因为这是包含|KEY1|
到|KEY4|
同时排除|PIPES|
的最简单方法。
如果您的目标是使用循环和正则表达式匹配,而不是单个复杂的正则表达式或使用indexOf()等函数进行实际解析,那么可以使用负前瞻来完成。< / p>
var x = "|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4";
var map = {};
while(x.length > 0) {
var key = x.match(/\|KEY[0-9]+\|/)[0];
x = x.substr(key.length);
var value = x.match(/(.(?!\|KEY[0-9]+\|))*/)[0];
x = x.substr(value.length);
map[key] = value;
}
alert(JSON.stringify(map, null, 4));
答案 1 :(得分:2)
这样就可以了。
//using regex
var keyString = "|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4"
var cases = keyString.match(/[^|]+/g)
var myObject = {};
if (cases.length > 0)
{
for (var i = 0; i < cases.length; i += 2)
{
myObject[cases[i].toString()] = cases[i+1].trim();
}
}
document.write(JSON.stringify(myObject));
&#13;
答案 2 :(得分:0)
您可以这样做:
var s = "|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4";
s.match(/\|(KEY\d+)\|.*?(?=\|KEY\d|$)/g).reduce(function (res, v) {
var match = v.match(/(KEY\d+)\|(.*?)\s*$/);
res[match[1]] = match[2];
return res;
}, {})
&#13;
另一种解决方案更容易:
var s = "|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4";
var v, res = {}, match = s.match(/\s*\|KEY\d+\|\s*|.+?(?=\s*\|KEY\d|$)/g);
while(v = match.shift())
res[v.replace(/^[\s|]*|[\s|]*$/g, '')] = match.shift();
&#13;
答案 3 :(得分:0)
像exec
和/[^|]+/g
之类的东西会给你一个很好的数组。
var str = "|KEY1|VALUE 1 |KEY2| VALUE 2 |KEY3| OTHER VALUE WITH ANY CHARACTER LIKE SPACES, |PIPES| AND WHAT YOU WANT |KEY4| VALUE4";
var re = /[^|]+/g;
var arr = [];
while ((arr = re.exec(str)) !== null){
console.log(arr[0].trim());
}
它比其他一些正则表达式更简单,我认为它更具可读性。我还使用了trim()
,如果你想在IE9之前支持,你必须使用the polyfill。