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RegEx + vs. {1,}

by Sewi (Friar)
on Oct 10, 2012 at 11:03 UTC ( #998200=perlquestion: print w/ replies, xml ) Need Help??

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  1. or download this
    perl -le 'print $x = "abcdefgxxabcdefgzzabcdsjfhkdfab"; print $2 if $x
    + =~ /((\w+).*?\2.*?)+/;'
    abcdefgxxabcdefgzzabcdsjfhkdfab
    ab
    
  2. or download this
    perl -le 'print $x = "abcdefgxxabcdefgzzabcdsjfhkdfab"; print $2 if $x
    + =~ /((\w{2,}).*?\2.*?)+/;'
    abcdefgxxabcdefgzzabcdsjfhkdfab
    abcdefg
    
  3. or download this
    perl -le 'print $x = "abcdefgxxabcdefgzzabcdsjfhkdfab"; print $2 if $x
    + =~ /((\w{2,}?).*?\2.*?)+/;'
    abcdefgxxabcdefgzzabcdsjfhkdfab
    cd
    

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