从逗号分隔值字符串中删除值 [英] remove value from comma separated values string

问题描述

我有一个csv字符串，像这样1,2,3，并希望能够从中删除所需的值。

I have a csv string like this "1,2,3" and want to be able to remove a desired value from it.

例如，如果我想要删除值：2，输出字符串应为以下内容：

For example if I want to remove the value: 2, the output string should be the following:

1,3

我使用以下代码，但似乎无效。

I'm using the following code but seems to be ineffective.

var values = selectedvalues.split(",");
            if (values.length > 0) {
                for (var i = 0; i < values.length; i++) {
                    if (values[i] == value) {
                        index = i;
                        break;
                    }
                }
                if (index != -1) {
                    selectedvalues = selectedvalues.substring(0, index + 1) + selectedvalues.substring(index + 3);                    
                }
            }
            else {
                selectedvalues = "";
            }

推荐答案

var removeValue = function(list, value, separator) {
  separator = separator || ",";
  var values = list.split(separator);
  for(var i = 0 ; i < values.length ; i++) {
    if(values[i] == value) {
      values.splice(i, 1);
      return values.join(separator);
    }
  }
  return list;
}

如果找到要找的值，返回新的逗号分隔列表。如果未找到，则返回旧列表。

If the value you're looking for is found, it's removed, and a new comma delimited list returned. If it is not found, the old list is returned.

感谢

Thanks to Grant Wagner for pointing out my code mistake and enhancement!

John Resign（jQuery，Mozilla）有一篇关于您可能会发现有用的JavaScript数组删除。

John Resign (jQuery, Mozilla) has a neat article about JavaScript Array Remove which you might find useful.

这篇关于从逗号分隔值字符串中删除值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！