How can I split a long string using regex (\.\s) ignoring a few cases

Harsh Vardhan 0
Viewed 33

For ex I have this sentence

Hello. Hello.bye. 125. 000. 182.000. U. S. A.

I want it to split it in a list of String and I am using regex "\.\s" for it and it looks like this below.

Hello
Hello.bye
125
000
182.000
U
S
A

But I want to add a condition where if there is a digit or a capital alphabet before the \.\s it should not split from there. For ex in the above case it looks like this below:

Hello
Hello.bye
125. 000
182.000
U. S. A.

I have tried using a positive look behind conditional but it's not working. Here is what I am doing

(?(?<!([A-Z]|[0-9]))(\.\s))
regex-lookarounds dart regex
1 Answers

You may use this regex for matching the parts you want to match:

\d+\.(?:\s*\d+)?|[A-Z]+(?:\.\s*[A-Z])+|\w[\w.]+?(?=\.\s)

RegEx Demo

RegEx Breakup:

  • \d+\.(?:\s*\d+)?: Match digits separated with dot and 0+ whitespaces
  • |: OR
  • [A-Z]+(?:\.\s*[A-Z])+: Match uppercase strings separated with dot and 0+ whitespaces
  • |: OR
  • \w[\w.]+?(?=\.\s): Match any other test that start with a word char and must have dot and whitespace as delimiter.

For splitting following regex would work but still a match should be preferred:

(?<![A-Z]|[1-9](?=\.\s\d))\.\s

RegEx Demo 2

anubhava0
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