perl (word by word check if a hash key)


 
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Old 01-08-2010
perl (word by word check if a hash key)

Hi,
Now i work in a code that
1-get data stored in the database in the form of hash table with a key
field which is the " Name"
2-in the same time i open a txt file and loop through it word by word
3- which i have a problem in is that :

I need to loop word by word and check if it is a hash key or not if a hash key print it .

Code:
#!/usr/bin/perl
 
 use DBI; 
 
       $sqlstatement= "select Name from Protein;"; 
 
    #open connection to Access database 
    $dbh = DBI->connect('dbi:ODBC:driver=microsoft access driver (*.mdb);dbq=C:\Perl\eg\db1.mdb'); 
 
    #prepare and execute SQL statement 
 
    $sth = $dbh->prepare($sqlstatement); 
    $sth->execute || 
    die "Could not execute SQL statement ... maybe invalid?"; 
 
 
    #output database results 
 
    while ( $ref = $sth->fetchrow_hashref($Name) ) 
{
    print "$$ref{'Name'} \n";
}
 
 
$filename= 'C:/Perl/eg/members.txt';
open (FILE,$filename) or die $!;
while (<FILE>){
# split each input line; words are separated by whitespace
  for $word (split)
  {
   print $word . "\n";
  }
}
close (FILE);

The code now can only print the hash returned from the database
and split the txt into words.
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FAHASH(1)							   User Commands							 FAHASH(1)

NAME
fahash - sequence hash builder for reverse e-PCR SYNOPSIS
fahash [-hV] -b hash-file [-w wdsize] [-f period] [-F fragment_min,fragment_max] [-k] [-c cachesize] [-v 1|2] famap-file ... fahash [-hV] -T hash-file [-o outfile] DESCRIPTION
The program fahash is part of the e-PCR suite and is used to build hash-files, and output word usage statistics for reverse e-PCR searches. OPTIONS
-b hash-file Build hash tables (hash-file) from sequence files, -T hash-file Print word usage statistics for hash-file -o outfile Write output to file `outfile' build-options: -w wordsize Set word size when building hash tables -f period Set discontiguity when building hash tables -k Skip repeats when building hash-file -F min,max Set watermarks for fragment size (in Mb) (version 1 only) -c cachesize Set cache size (version 2 only) -v ver Use format version (1|2, 2 is default) EXAMPLE
famap -tN -b genome.famap org/chr_*.fa fahash -b genome.hash -w 12 -f3 ${PWD}/genome.famap re-PCR -s genome.hash -n1 -g1 ACTATTGATGATGA AGGTAGATGTTTTT 120-200 See famap(1) and re-pcr(1) SEE ALSO
/usr/share/doc/ncbi-epcr/README.txt bioperl(1), e-pcr(1), famap(1) and re-pcr(1) AUTHORS
This manual page was written by Andreas Tille <tille@debian.org> for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. Reverse e-PCR: sequence hash builder version 2.3.9 April 2008 FAHASH(1)