Javascript and regex: split string and keep the separator

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I was having similar but slight different problem. Anyway, here are examples of three different scenarios for where to keep the deliminator.

"1、2、3".split("、") == ["1", "2", "3"]
"1、2、3".split(/(、)/g) == ["1", "、", "2", "、", "3"]
"1、2、3".split(/(?=、)/g) == ["1", "、2", "、3"]
"1、2、3".split(/(?!、)/g) == ["1、", "2、", "3"]
"1、2、3".split(/(.*?、)/g) == ["", "1、", "", "2、", "3"]

Warning: The fourth will only work to split single characters. ConnorsFan presents an alternative:

// Split a path, but keep the slashes that follow directories
var str="Animation/rawr/javascript.js";
var tokens = str.match(/[^\/]+\/?|\//g);

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