javascript javascript在逗号后截断字符串
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javascript Truncate string after comma
提问by user610728
I'm looking for a way to remove the comma and all that comes after it in a string, for example:
我正在寻找一种方法来删除逗号及其后的所有字符串，例如：
important, not so important
重要，不那么重要
I'd like to remove ",not so important"
我想删除“，不那么重要”
Any ideas? Thanks in advance!
有任何想法吗？提前致谢！
回答by Felix Kling
You can do it with substringand indexOf:
str = str.substring(0, str.indexOf(','));
but you'd have to be sure that a comma is in there (test it before).
但你必须确保逗号在那里（之前测试过）。
Another possibility is to use split():
另一种可能性是使用split()：
str = str.split(',')[0];
this works even without testing beforehand but might perform unnecessary string operations (which is probably negligible on small strings).
即使没有事先测试，这也能工作，但可能会执行不必要的字符串操作（这在小字符串上可能可以忽略不计）。
回答by Loktar
http://www.jsfiddle.net/a5SWU/
http://www.jsfiddle.net/a5SWU/
var a = "important, not so important";
a = a.split(",")[0];
