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Mastering Regular Expressions Mastering Regular Expressions by Jeffrey E.F. Friedl
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“Just as there is a difference between playing a musical piece well and making music, there is a difference between knowing about regular expressions and really understanding them.”
Jeffrey E.F. Friedl, Mastering Regular Expressions
“$/ = ".\n";
while (<>) {
next if !s/\b([a-z]+)((?:\s|<[^>]+>)+)(\1\b)/\e[7m$1\e[m$2\e[7m$3\e[m/ig;
s/^(?:[^\e]*\n)+//mg; # Remove any unmarked lines.
s/^/$ARGV: /mg; # Ensure lines begin with filename.
print;
}”
Jeffrey E.F. Friedl, Mastering Regular Expressions: Understand Your Data and Be More Productive
“When it comes down to it, regular expressions are not difŒcult. But, if you talk to the average user of a program or language that supports them, you will likely Œfind someone that understands them ™a bit,š but does not feel secure enough to really use them for anything complex or with any tool but those they use most often.”
Jeffrey E.F. Friedl, Mastering Regular Expressions