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Full Discussion: longest, shortest, map wrong
Top Forums Shell Programming and Scripting longest, shortest, map wrong Post 302413398 by jimmy_y on Thursday 15th of April 2010 10:11:51 PM
Old 04-15-2010
longest, shortest, map wrong
Hi Everyone,
a.txt
Code:
cola,colb1111
601030,CEL
6031,CEL
60103,CEL

Would like to find the longest field colb1111, and shortest, so the output is 6, 4

my code:
Code:
#!/usr/bin/perl
use strict;
use warnings;

my %prefix_to_contry = ();
my $key;
open(FH,'/root/a.txt') or die "$!";
while(<FH>){
        chomp;
        my @fields = split(/,/);
        $prefix_to_contry{$fields[0]} = $fields[1];
}
my ( $shortest, $longest ) = ( sort { $a <=> $b } map { length } keys %prefix_to_contry )[ 0, -1 ];
print "$shortest  $longest\n";exit;

but the output is shortest=4, longest=9. where is wrong with this code.

Thanks

---------- Post updated at 08:03 PM ---------- Previous update was at 11:36 AM ----------

any advice, thanks

---------- Post updated at 09:11 PM ---------- Previous update was at 08:03 PM ----------

find the anwer already.

before chmop, add next if $. < 2;
Last edited by jimmy_y; 04-15-2010 at 10:54 PM..
 

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LEARN ABOUT DEBIAN

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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