如何将字符串转换为JavaScript数组?
看看代码:
var string = "0,1";
var array = [string];
alert(array[0]);
在这种情况下，警报显示0,1。如果它是一个数组，它将显示0。如果调用alert(数组[1])，它应该弹出1
是否有机会将这样的字符串转换为JavaScript数组?
当前回答
正则表达式
作为分割的更强大的替代品，你可以使用匹配
"0,1".match(/\d+/g)
Let a = "0,1".match(/\d+/g) console.log(一个);
其他回答
使用ES6的另一个选项是使用扩展语法。
var convertedArray =[…"01234"];
var stringToConvert = "012"; var convertedArray =[…stringToConvert]; console.log (convertedArray);
使用Array.filter的示例:
var str = 'a,b,hi,ma,n,yu';
var strArr = Array.prototype.filter.call(str, eachChar => eachChar !== ',');
分了就分了，人品;
var string = "0,1";
var array = string.split(",");
alert(array[0]);
正则表达式
作为分割的更强大的替代品，你可以使用匹配
"0,1".match(/\d+/g)
Let a = "0,1".match(/\d+/g) console.log(一个);
转换所有类型的字符串
var array = (new Function("return [" + str+ "];")());
var string = "0,1";
var objectstring = '{Name:"Tshirt", CatGroupName:"Clothes", Gender:"male-female"}, {Name:"Dress", CatGroupName:"Clothes", Gender:"female"}, {Name:"Belt", CatGroupName:"Leather", Gender:"child"}';
var stringArray = (new Function("return [" + string+ "];")());
var objectStringArray = (new Function("return [" + objectstring+ "];")());
JSFiddle https://jsfiddle.net/7ne9L4Lj/1/
控制台结果
一些练习不支持对象字符串
- JSON.parse("[" + string + "]"); // throw error
- string.split(",")
// unexpected result
["{Name:"Tshirt"", " CatGroupName:"Clothes"", " Gender:"male-female"}", " {Name:"Dress"", " CatGroupName:"Clothes"", " Gender:"female"}", " {Name:"Belt"", " CatGroupName:"Leather"", " Gender:"child"}"]
