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Full Discussion: Slow Producer - Fast consumer
Top Forums UNIX for Dummies Questions & Answers Slow Producer - Fast consumer Post 302469319 by jakeo25 on Friday 5th of November 2010 01:04:39 PM
Old 11-05-2010
Slow Producer - Fast consumer
I would like to loop through a set of directories, performing operation(s) on each one. The basic script** is
Code:
dirs=`find . -name .svn -print`

for f in $dirs; do 
   echo "Processing $f directory .." 
done

Fine and dandy, but here is the problem: the find expression must complete before the do ... done begins. The find process is relatively slow. I would like to have the do .. done work on entries as they are appended to the list. So in essence there are two threads, the find works in the background, and the do consumes $dirs until empty.

How would the do .. done loop "know" that the $dirs is still being populated? Maybe this needs to be changed completely using another method.

Thanks in advance.



** Some of you will recognize the ".svn", as Subversion stores additional copies of data on the local machine in ".svn" directories.
Last edited by vbe; 11-05-2010 at 03:29 PM.. Reason: Code tags please
 

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LEARN ABOUT DEBIAN

graphics::primitive::insets

Graphics::Primitive::Insets(3pm)			User Contributed Perl Documentation			  Graphics::Primitive::Insets(3pm)

NAME

       Graphics::Primitive::Insets - Space between things

DESCRIPTION

       Graphics::Primitive::Insets represents the amount of space that surrounds something.  This object can be used to represent either padding
       or margins (in the CSS sense, one being inside the bounding box, the other being outside)

SYNOPSIS

	 use Graphics::Primitive::Insets;

	 my $insets = Graphics::Primitive::Insets->new({
	   top	   => 5,
	   bottom  => 5,
	   left    => 5,
	   right   => 5
	 });

METHODS

   Constructor
       new Creates a new Graphics::Primitive::Insets.

   Instance Methods
       as_array
	   Return these insets as an array in the form of top, right, bottom and left.

       bottom
	   Set/Get the inset from the bottom.

       equal_to
	   Determine if these Insets are equal to another.

       left
	   Set/Get the inset from the left.

       right
	   Set/Get the inset from the right.

       top Set/Get the inset from the top.

       zero
	   Sets all the insets (top, left, bottom, right) to 0.

AUTHOR

       Cory Watson, "<gphat@cpan.org>"

SEE ALSO

       perl(1)

COPYRIGHT &; LICENSE
       Copyright 2008-2010 by 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							    2010-08-21					  Graphics::Primitive::Insets(3pm)
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