Working on a file.

scriptinperl has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Working on a file. by zwon (Abbot) on Jan 20, 2010 at 18:57 UTC
And the file format is... Are columns separated by spaces, or is it CSV file, or is it some XML format? If you already read file and have column stored in array, let's call it `@species` then it is simple: `my %hash; for (@species) { $hash{$_}++; } print "Number of different species: ", 0+(keys %hash), "\n"; for (sort keys %hash) { print "$_: ", $hash{$_}, "\n"; }` [download]	[reply] [d/l] [select]
Re^2: Working on a file. by scriptinperl (Initiate) on Jan 20, 2010 at 19:14 UTC
It is a CSV File Zwon.	[reply]
Re^3: Working on a file. by almut (Canon) on Jan 20, 2010 at 19:28 UTC
...then give Text::CSV a try.	[reply]
Re^3: Working on a file. by zwon (Abbot) on Jan 20, 2010 at 19:28 UTC
Then have a look on Text::CSV, it will allow you to parse your file.	[reply]
Re^4: Working on a file. by scriptinperl (Initiate) on Jan 20, 2010 at 19:36 UTC
Re: Working on a file. by CountZero (Bishop) on Jan 20, 2010 at 22:10 UTC
Or have a look at DBI and DBD::CSV. It allows you to access your file as a database and use SQL to get your answers. CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James	[reply]
Re: Working on a file. by BioLion (Curate) on Jan 20, 2010 at 19:05 UTC
scriptinperl - this isn't a code writing service! If you want help, you'll need to at least give us some code that you have tried and some example data... Just a something something...	[reply]