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Top Forums Shell Programming and Scripting Kornshell grabbing value from file Post 302490705 by Perderabo on Tuesday 25th of January 2011 02:05:42 PM
Old 01-25-2011
If i understand the question... Use $(<filename) like this:
Code:
$ cd /tmp
$ xval=0
$ echo 123 > xfile
$ echo $xval
0
$ xval=$(<xfile)
$ echo $xval
123
$

 

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Moose::Cookbook::Snack::Types(3)			User Contributed Perl Documentation			  Moose::Cookbook::Snack::Types(3)

NAME
Moose::Cookbook::Snack::Types - Snippets of code for using Types and Type Constraints VERSION
version 2.1202 SYNOPSIS
package Point; use Moose; has 'x' => ( isa => 'Int', is => 'ro' ); has 'y' => ( isa => 'Int', is => 'rw' ); package main; use Try::Tiny; my $point = try { Point->new( x => 'fifty', y => 'forty' ); } catch { print "Oops: $_"; }; my $point; my $xval = 'forty-two'; my $xattribute = Point->meta->find_attribute_by_name('x'); my $xtype_constraint = $xattribute->type_constraint; if ( $xtype_constraint->check($xval) ) { $point = Point->new( x => $xval, y => 0 ); } else { print "Value: $xval is not an " . $xtype_constraint->name . " "; } DESCRIPTION
This is the Point example from Moose::Cookbook::Basics::Point_AttributesAndSubclassing with type checking added. If we try to assign a string value to an attribute that is an "Int", Moose will die with an explicit error message. The error will include the attribute name, as well as the type constraint name and the value which failed the constraint check. We use Try::Tiny to catch this error message. Later, we get the Moose::Meta::TypeConstraint object from a Moose::Meta::Attribute and use the Moose::Meta::TypeConstraint to check a value directly. SEE ALSO
Moose::Cookbook::Basics::Point_AttributesAndSubclassing Moose::Util::TypeConstraints Moose::Meta::Attribute AUTHORS
o Stevan Little <stevan.little@iinteractive.com> o Dave Rolsky <autarch@urth.org> o Jesse Luehrs <doy@tozt.net> o Shawn M Moore <code@sartak.org> o XXXX XXX'XX (Yuval Kogman) <nothingmuch@woobling.org> o Karen Etheridge <ether@cpan.org> o Florian Ragwitz <rafl@debian.org> o Hans Dieter Pearcey <hdp@weftsoar.net> o Chris Prather <chris@prather.org> o Matt S Trout <mst@shadowcat.co.uk> COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.18.2 2014-01-19 Moose::Cookbook::Snack::Types(3)
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