Split string at specific character with optional comma

Question

I need to split a string for each d chracter, which has an optional comma in front.

d(ii)d(ii)
d(ii),d(ii)
dd
d,d

should result in two element arrays:

d(ii) | d(ii)
d(ii) | d(ii)
d | d
d | d

Also a single d string should result in an array with this single element.

I've started with string.split(',') but obviously it doesn't take care about the comma

Answer 1

您可以使用d的正向超前和前面的可选逗号进行拆分。

 console.log(['d(ii)d(ii)', 'd(ii),d(ii)', 'dd', 'd,d'].map(s => s.split(/,?(?=d)/))); 

Answer 2

 function splitD(str){ var result = str.replace(/,/g, "").replace(/d/g, " d").trim().split(" "); console.log(result); return result; } splitD("d(ii)d(ii)"); splitD("d(ii),d(ii)"); splitD("dd"); splitD("d,d");