Regular expression to find strings between special characters using QRegExp

Question

I want to match the Property Name and Property value in the string below

#Property Name : Property Value

The Property Name and Property Value are single/multi-worded sentence with numbers and spaces only. No special characters in them.

I tried with (?<=#)(.*):(.*?) but it is not working. I read through many of the questions in this website and tried them, but none seemed to work.

I expect the answer to use QRegExp (RegEx class of Qt) of qt4

Marek R · Accepted Answer · 2015-03-16 12:27:35Z

1

IMO this is better:

^#\s*([^:]+?)\s*:\s*(.*?)\s*$

https://regex101.com/r/pW3wV4/3

See this to why my solution is better (same reg exp but more test cases).

edited Mar 16, 2015 at 12:27

answered Mar 16, 2015 at 9:19

Marek R

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8 Comments

Sathish Over a year ago

Thanks. This works too! Can you explain why your expression is better? As I see it takes care of the leading and trailing spaces and also other special characters. Is that it?

Marek R Over a year ago

here are examples proving why my regexp is better. Give more data so it could be even more polished.

Sathish Over a year ago

Awesome example. Thanks again! It covers all my requirements

Sathish Over a year ago

this is not working now. QRegExp.isvalid() returns false. So the regex is not running in qt. But it is working in online regex editors. Any help to solve the issue?

Marek R Over a year ago

I'm pretty sure you've messed up the back slashes. Create new question with complete code, and add link here. Note there is new API in Qt5: QRegularExpression.

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Amen Jlili · Accepted Answer · 2015-03-16 08:52:40Z

1

Try the following regex

^#([a-zA-Z0-9 ]*) : ([a-zA-Z0-9 ]*)$

demo here: https://regex101.com/r/gS7rF5/2

answered Mar 16, 2015 at 8:52

Amen Jlili

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2 Comments

Sathish Over a year ago

@Amen, Thanks, it works! But I don't know why (?<=#)(.*):(.*) which worked in the online regex tester didn't work for QRegExp. Any ideas?

Sathish Over a year ago

I will wait for some other answers to the question for a while.

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