如何将逗号分隔的字符串转换为数组？

我有一个逗号分隔的字符串，我想把它转换成一个数组，这样我就可以遍历它。

有什么内置的功能吗？

例如，我有这个字符串

var str = "January,February,March,April,May,June,July,August,September,October,November,December";

现在我想用逗号将其拆分，然后将其存储在数组中。

当前回答

如果你的目标是整数，比如1,2,3,4,5，请注意。如果要在拆分字符串后将数组元素用作整数而不是字符串，请考虑将它们转换为整数。

var str = "1,2,3,4,5,6";
var temp = new Array();
// This will return an array with strings "1", "2", etc.
temp = str.split(",");

添加这样的循环，

for (a in temp ) {
    temp[a] = parseInt(temp[a], 10); // Explicitly include base as per Álvaro's comment
}

将返回一个包含整数而非字符串的数组。

其他回答

var array = string.split(',');

MDN引用，对于极限参数的可能意外行为非常有用。（提示：“a，b，c”.split（“，”，2）指向[“a”，“b”]，而不是[“a，”b，c“]。）

对于逗号分隔字符串的字符串数组：

let months = ["January","Feb"];
let monthsString = months.join(", ");

如果用户通过添加额外的空格键入错误。你可以用这样的东西。

tags: foo,  zar, gar

const stringToArr = (string) => {
  return string.trim.split(",");
};

let str = "January,February,March,April,May,June,July,August,September,October,November,December"

let arr = str.split(',');

这将导致：

["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

如果要将以下内容转换为：

["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

这：

"January,February,March,April,May,June,July,August,September,October,November,December";

use:

str = arr.join(',')

请注意：

var a = "";
var x = new Array();
x = a.split(",");
alert(x.length);

将提醒1

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