Regex capitalize first letter every word, also after a special character like a dash

Question

I use this #(\\s|^)([a-z0-9-_]+)#i for capitalize every first letter every word, i want it also to capitalize the letter if it\'s after a special mark like a da

Answer 1

Here's my Python solution

>>> import re
>>> the_string = 'this is a test for stack-overflow'
>>> re.sub(r'(((?<=\s)|^|-)[a-z])', lambda x: x.group().upper(), the_string)
'This Is A Test For Stack-Overflow'

read about the "positive lookbehind" here: https://www.regular-expressions.info/lookaround.html