( BaT | 2013. 11. 15., p – 14:16 )

PS C:\> "zabaabaaab" -replace "a*","X"
XzXXbXXbXXbX
PS C:\> "zabaabaaab" -replace "a+","X"
zXbXbXb
PS C:\> "aaaababababcabcabc" -replace "a+","X"
XbXbXbXbcXbcXbc
PS C:\> "aaaababababcabcabc" -replace "a+(ab)*(abc)*","X"
XbXbXbXbcXbcXbc
PS C:\> "aaaababababcabcabc" -replace "a{4}(ab)*(abc)*","X"
Xbabababcabcabc
PS C:\>

Lehet elemezni. :)