ActionScript 3.0 :: String.split() Using Regex Not Working

May 12, 2011

I rarely use regular expressions and still have a hard time reading/writing them sometimes (getting better, though), but I came across a situation where I needed to split up sentences in a text file and store each sentence as a separate item in an array.

To do this, I have tried to use the split() function by passing it a regex to detect ends of sentences... for most cases, anyway, which includes ., !, or ?, optionally followed by " or )

Here's what I've created:

Code:
sentencesArray = textOriginal_txta.text.split(/(?<=(w[.!?]"?)?))s(?=((?"?[A-Z]))/);

(What this code does is split on condition of a blank space but only where it finds a preceding/prefix that includes end punctuation, plus a lookahead/suffix that contains the beginning of a sentence, such as a capital letter)

The problem is that this doesn't seem to work. It works like a charm when I test it in Expresso free regex writing and testing software), but then when I try to send it to the split, it doesn't split the items. Do I need to do escapes for special characters when sending regex input to a split?

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