从字符串创建数组的Regex

Question

我有一个字符串如下

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]";

我想从上面的字符串中得到三个数组，如下所示

var arr1 = ["series-3","series-5","series-6"];

var arr2 = ["a3","a4","a5"];

var arr3 = ["class a", "class b"];

我应该使用什么regex来实现这一点？没有regex就能做到这一点吗？

Answer 1

使用String#split()方法

​

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]";

// split string based on comma followed by [
var temp = str.split(/,(?=\[)/);

// remove [ and ] from string usning slice
// then split using , to get the result array
var arr1 = temp[0].slice(1, -1).split(',');
var arr2 = temp[1].slice(1, -1).split(',');
var arr3 = temp[2].slice(1, -1).split(',');

console.log(arr1, arr2, arr3);

​

或有某种变化的相同方法

​

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]";

// Remove [ at start and ] at end using slice
// and then split string based on `],[`
var temp = str.slice(1, -1).split('],[');

// then split using , to get the result array
var arr1 = temp[0].split(',');
var arr2 = temp[1].split(',');
var arr3 = temp[2].split(',');

console.log(arr1, arr2, arr3);

​

Answer 2

可以使用RegEx和String方法。最好是创建一个对象，并在该对象中存储单独的数组。

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]";

// Match anything that is inside the `[` and `]`
var stringsArr = str.match(/\[[^[\]]*\]/g);

// Result object
var result = {};

// Iterate over strings inside `[` and `]` and split by the `,`
stringsArr.forEach(function(str, i) {
    result['array' + (i + 1)] = str.substr(1, str.length - 2).split(',');
});

console.log(result);

​

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]";
var stringsArr = str.match(/\[[^[\]]*\]/g);

var result = {};
stringsArr.forEach(function(str, i) {
    result['array' + (i + 1)] = str.substr(1, str.length - 2).split(',');
});

console.log(result);

​

要创建全局变量(不推荐)，只需在forEach中删除var result = {};并将result替换为window。

Answer 3

我宁愿这样做

​

var str = "[series-3,series-5,series-6],[a3,a4,a5],[class a,class b]",
   arrs = str.match(/[^[]+(?=])/g).map(s => s.split(","));
console.log(arrs);

​