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Operating Systems Linux Ubuntu Match col 1 of File 1 with col 1 File 2 and create a 3rd file Post 302329972 by sogi on Monday 29th of June 2009 11:40:10 PM
Old 06-30-2009
Match col 1 of File 1 with col 1 File 2 and create a 3rd file

Hello,

I have a 1.6 GB file that I would like to modify by matching some ids in col1 with the ids in col 1 of file2.txt and save the results into a 3rd file.

For example:

File 1 has 1411 rows, I ignore how many columns it has (thousands)
File 2 has 311 rows, 1 column

Would like to create

File 3 with 311 rows (thousands of columns)

What is the fastest way to do this without consuming too much memory?

Thank you!
 

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Layout::Manager::Grid(3pm)				User Contributed Perl Documentation				Layout::Manager::Grid(3pm)

NAME
Layout::Manager::Grid - Simple grid-based layout manager. DESCRIPTION
Layout::Manager::Grid is a layout manager places components into evenly divided cells. When you instantiate a Grid manager, you must supply it with a count of how many rows and columns it will have. For example, a Grid with 1 column and 2 rows would look like: +--------------------------------+ | | | component 1 | | | +--------------------------------+ | | | component 2 | | | +--------------------------------+ The container is divided into as many <rows> * <columns> cells, with each taking up an equal amount of space. A grid with 3 columns and 2 rows would create 6 cells that consume 33% of the width and 50% of the height. Components are placed by specifying the cell they reside in via the row and column number. $container->add_component($comp, { row => 0, column => 3 }); $container->add_component($comp, { row => 0, column => 2, height => 2 }); Optionally, you may choose to override the default "width" or "height" of 1. Setting it to a something else will cause the component to consume that many rows or columns worth of space. Grid is similar to Java's GridLayout <http://java.sun.com/docs/books/tutorial/uiswing/layout/grid.html>. SYNOPSIS
$cont->add_component($comp1, { row => 0, column => 1 }); $cont->add_component($comp2, { row => 0, column => 2 }); my $lm = Layout::Manager::Grid->new(rows => 1, columns => 2); $lm->do_layout($con); DYNAMIC SIZING If the container that the Grid is manging does not have one or both of it's dimensions set, Grid will compute the appropriate sizes. The simple way for me to avoid writing a long explanation is to say it works similar to HTML tables. Rows will become as big as their biggest consituent, as will columns. It is common to add a Grid-managed component to a scene with only one of it's dimensions set. ATTRIBUTES
columns The number of columns in this Grid. rows The number of rows in this Grid. METHODS
do_layout Size and position the components in this layout. AUTHOR
Cory Watson, "<gphat@cpan.org>" COPYRIGHT &; LICENSE Copyright 2008 - 2010 Cory G Watson This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.3 2011-05-16 Layout::Manager::Grid(3pm)
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