Javascript regex 提取最后一个反斜杠之前的字符串
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Javascript regex to extract the string before the last backslash
提问by chromedude
I am dealing with timezone's in Javascript and I need a regex that will extract everything, but the timezone name from it. For example, I have the timezone America/Argentina/Buenos_Aires. I want to extract the America/Argentinapart with a regex. Currently I have this regex: tz.match(/.*?(?=\/|$)/i)[0]which extracts everything to the first backslash which works for most timezones (America/Los_Angeles), but not for all of them. How could I edit that regex so that it gets the string before the last value?
我正在处理 Javascript 中的时区，我需要一个正则表达式来提取所有内容，但从中提取时区名称。例如，我有 timezone America/Argentina/Buenos_Aires。我想America/Argentina用正则表达式提取部分。目前我有这个正则表达式：tz.match(/.*?(?=\/|$)/i)[0]它将所有内容提取到第一个反斜杠，适用于大多数时区（America/Los_Angeles），但不适用于所有时区。我如何编辑该正则表达式，以便它在最后一个值之前获取字符串？
回答by David says reinstate Monica
I'd personally suggest avoiding regular expressions for something like this, when simple string functions/methods would suffice admirably:
我个人建议避免使用正则表达式，因为简单的字符串函数/方法就足够了：
var stringVariable = 'America/Argentina/Buenos_Aires',
text = stringVariable.substring(0, stringVariable.lastIndexOf('/'));
