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Re^20: Addional "year" matching functionality in word matching script

by bms9nmh (Novice)
on Jul 12, 2016 at 16:54 UTC ( #1167631=note: print w/replies, xml ) Need Help??


in reply to Re^19: Addional "year" matching functionality in word matching script
in thread Addional "year" matching functionality in word matching script

I have been testing some code on a smaller scale and something is confusing me. Why does the  print "$csv2\n"; command at the end of this script print each full line of the csv. $csv2 has been populated with the key data of csv2hash, so I'm confused as to why it would print each line? Is each line considered a key in this instance?
#!/bin/perl my @csv2 = (); # Creates new empty array @csv2 open CSV2, "<csv2" or die; # Creates the file handle CSV2, input +s the data from csv2 into CVS2 @csv2=<CSV2>; # populates @csv2 array with data from file handle + CSV2 close CSV2; my %csv2hash = (); # Creates empty hash csv2hash for (@csv2) { # for data in @csv2 array #chomp; my ($title) = $_ =~ /^.+?,\s*([^,]+?),/; #/define the data whic +h is the title #Indicate that title data will input into csv2hash $csv2hash{$_} = $title; } foreach my $csv2 (keys %csv2hash) { # iterates over all the keys in %c +sv2hash, assigning each one to $csv2 my $value = $csv2hash{$csv2}; print "$csv2\n"; # This prints the data line by line in the csv2

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Re^21: Addional "year" matching functionality in word matching script
by Corion (Patriarch) on Jul 12, 2016 at 16:59 UTC

    The keys of %csv2hash are the lines:

    for (@csv2) { # for data in @csv2 array my ($title) = $_ =~ /^.+?,\s*([^,]+?),/; $csv2hash{$_} = $title; }

    Here, $_ (the current line) is used as a key into %csv2hash.

      What does this bit of the script do?  my @matches   = ( $value=~/\b$word\b/ig ); specifically the  \b  \b/ig bits?
        See perlre for explanation.

        \b matches "word boundaries", but in a special meaning of "word". /i makes the matching case insensitive, and /g makes it global, i.e. it matches as many times as it can, and returns all the matching substrings.

        ($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord }map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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