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
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(',')
其他回答
最简单的方法：
let myStr = '1, 2, 3, 4, 5, 7, 8';
const stringToArr = (myStr) => {
return myStr.split(',').map(x => x.trim());
};
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(',')
下面是一个函数，它将字符串转换为数组，即使列表中只有一项（没有分隔符）：
function listToAray(fullString, separator) {
var fullArray = [];
if (fullString !== undefined) {
if (fullString.indexOf(separator) == -1) {
fullArray.push(fullString);
} else {
fullArray = fullString.split(separator);
}
}
return fullArray;
}
这样使用：
var myString = 'alpha,bravo,charlie,delta';
var myArray = listToArray(myString, ',');
myArray[2]; // charlie
var yourString = 'echo';
var yourArray = listToArray(yourString, ',');
yourArray[0]; // echo
我创建这个函数是因为如果字符串中没有分隔符（只有一个项目），split会抛出一个错误。
最短的
str.split`,`
var str=“一月、二月、三月、四月、五月、六月、七月、八月、九月、十月、十一月、十二月”；让arr=str.split`，`；控制台日志（arr）；
对于逗号分隔字符串的字符串数组：
let months = ["January","Feb"];
let monthsString = months.join(", ");
