如何使用JavaScript在循环中拆分逗号分隔的字符串和进程 [英] How to split a comma separated string and process in a loop using JavaScript

问题描述

如何使用JavaScript在循环中拆分逗号分隔的字符串和进程？

How to split a comma separated string and process in a loop using JavaScript?

推荐答案

我的两分钱，添加修剪到删除sAc答案中留下的初始空格。

My two cents, adding trim to remove the initial whitespaces left in sAc's answer.

var str = 'Hello, World, etc';
var str_array = str.split(',');

for(var i = 0; i < str_array.length; i++) {
   // Trim the excess whitespace.
   str_array[i] = str_array[i].replace(/^\s*/, "").replace(/\s*$/, "");
   // Add additional code here, such as:
   alert(str_array[i]);
}

编辑：

在得到这个答案的几个赞成之后，我想重新审视这个问题。如果你想在逗号上拆分，并执行修剪操作，你可以在一个方法调用中完成它而不需要任何显式循环，因为 split 也会定期表达式作为参数：

After getting several upvotes on this answer, I wanted to revisit this. If you want to split on comma, and perform a trim operation, you can do it in one method call without any explicit loops due to the fact that split will also take a regular expression as an argument:

'Hello, cruel , world!'.split(/\s*,\s*/);
//-> ["Hello", "cruel", "world!"]

然而，这个解决方案不会修剪第一个项目的开头和最后一个项目的结尾，这通常不是问题。

This solution, however, will not trim the beginning of the first item and the end of the last item which is typically not an issue.

所以回答有关循环过程的问题，如果您的目标浏览器支持ES5数组附加功能，例如 map 或 forEach 方法，那么您只需执行以下操作即可：

And so to answer the question in regards to process in a loop, if your target browsers support ES5 array extras such as the map or forEach methods, then you could just simply do the following:

myStringWithCommas.split(/\s*,\s*/).forEach(function(myString) {
    console.log(myString);
});

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