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Full Discussion: grep for non numbers
Top Forums Shell Programming and Scripting grep for non numbers Post 83874 by reborg on Tuesday 20th of September 2005 11:43:26 AM
Old 09-20-2005
No that's not what OP asked for, it's exactly what Ygor posted, or if you chec the exit value what I posted.

just number with + or - are ok, anthing esle is not.
 

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Heap::Elem::Str(3pm)					User Contributed Perl Documentation				      Heap::Elem::Str(3pm)

NAME
Heap::Elem::Str - String Heap Elements SYNOPSIS
use Heap::Elem::Str( StrElem ); use Heap::Fibonacci; my $heap = Heap::Fibonacci->new; my $elem; foreach $i ( 'aa'..'bz' ) { $elem = StrElem( $i ); $heap->add( $elem ); } while( defined( $elem = $heap->extract_top ) ) { print "Smallest is ", $elem->val, " "; } DESCRIPTION
Heap::Elem::Str is used to wrap string values into an element that can be managed on a heap. The top of the heap will have the smallest element still remaining. (See Heap::Elem::StrRev if you want the heap to always return the largest element.) The details of the Elem interface are described in Heap::Elem. The details of using a Heap interface are described in Heap. AUTHOR
John Macdonald, john@perlwolf.com COPYRIGHT
Copyright 1998-2007, O'Reilly & Associates. This code is distributed under the same copyright terms as perl itself. SEE ALSO
Heap(3), Heap::Elem(3), Heap::Elem::StrRev(3). perl v5.8.8 2007-10-23 Heap::Elem::Str(3pm)
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