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
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);
其他回答
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"}"]
使用Array.filter的示例:
var str = 'a,b,hi,ma,n,yu';
var strArr = Array.prototype.filter.call(str, eachChar => eachChar !== ',');
这在ES6中很容易实现;
你可以使用Array.from('string')将字符串转换为数组;
Array.from("01")
将console.log
['0', '1']
这正是你想要的。
分了就分了，人品;
var string = "0,1";
var array = string.split(",");
alert(array[0]);
Var I = "[{a:1,b:2}]"， j = i.replace (/ ([a-zA-Z0-9] + ?): / g,“$ 1”:).replace (/ / g,””), k = JSON.parse(j); console.log (k)
// =>声明正则表达式
[a-zA-Z0-9] =>匹配所有a-z, a-z, 0-9
(): =>组所有匹配的元素
$1 =>替换字符串指正则表达式中的第一个匹配组。
G =>全局标志
