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

对于逗号分隔字符串的字符串数组:

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

其他回答

将逗号分隔的字符串传递到此函数,它将返回一个数组,如果找不到逗号分隔字符串,则返回null。

function splitTheString(CommaSepStr) {
    var ResultArray = null;

    // Check if the string is null or so.
    if (CommaSepStr!= null) {

        var SplitChars = ',';

        // Check if the string has comma of not will go to else
        if (CommaSepStr.indexOf(SplitChars) >= 0) {
            ResultArray = CommaSepStr.split(SplitChars);

        }
        else {

            // The string has only one value, and we can also check
            // the length of the string or time and cross-check too.
            ResultArray = [CommaSepStr];
        }
    }
    return ResultArray;
}

split()方法用于将字符串拆分为子字符串数组,并返回新数组。

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

对于逗号分隔字符串的字符串数组:

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

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。