javascript 用正则表达式拆分字符串以使其成为没有空元素的数组
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Splitting string with regular expression to make it array without empty element
提问by scx
Here, I have example javascipt string:
在这里，我有示例 javascipt 字符串：
example_string = "Answer 1| Answer 2| Answer 3|";
I am trying to get array like this using regular expression:
我正在尝试使用正则表达式获取这样的数组：
Array ["Answer 1", " Answer 2", " Answer 3"]
I have tried:
我努力了：
result = example_string.split('/[|]+/g');
and also with the following patterns
以及以下模式
'/[|]+/g'
'/[|]+\b/g'
'/[|]+[^$]/g'
And I am still getting an array with empty element at the end of it:
我仍然得到一个包含空元素的数组：
Array ["Answer 1", " Answer 2", " Answer 3", ""]
That cause me lot of trouble. Does anyone know where I am making mistake in my pattern or how to fix it?
那给我带来很多麻烦。有谁知道我在我的模式中犯了什么错误或如何解决它？
回答by Javier Diaz
I always liked matching everything I always hated split but:
我总是喜欢匹配我一直讨厌分裂的所有东西，但是：
Regex for splitting: (\|(?!$))DEMO
用于拆分的正则表达式：(\|(?!$))DEMO
Matching instead of splitting:
匹配而不是拆分：
Regex: (?:([\w\s]+)\|?)
正则表达式： (?:([\w\s]+)\|?)
You can even use [^\|]+To match whatever you have to match BUT |
您甚至可以使用[^\|]+To 匹配您必须匹配的任何内容 BUT|
回答by Martin Ender
There is no mistake. This is absolutely correct behavior (how would splitknow that this is not a CSV file with the last column having an empty value?). If you know your string always ends in |, you could remove the last one first manually. Or you could just take away the last element of the array if it is empty. However, I can't seem to find a possibility (in JavaScript) to tell the built-in splitfunction to omit empty results.
没有错误。这是绝对正确的行为（如何split知道这不是最后一列具有空值的 CSV 文件？）。如果您知道您的字符串总是以 结尾|，您可以先手动删除最后一个。或者，如果数组为空，您可以删除数组的最后一个元素。但是，我似乎找不到（在 JavaScript 中）告诉内置split函数省略空结果的可能性。
