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Full Discussion: Valid input compared with input
Top Forums Shell Programming and Scripting Valid input compared with input Post 302437519 by ckozler on Thursday 15th of July 2010 09:29:24 AM
Old 07-15-2010
Valid input compared with input
Hi everyone,

I cant seem to figure this out for the life of me. Basically, I have two arrays..

Code:
sub init {
        use Getopt::Long;
        use Data::Dumper;
        my @selections = ();
        my @valid_options = ( "vaild1", "valid2" );
        GetOptions( "input=s" => \@selections );
        
        #
        # Loop input and compare against valid options storing invalid options
        #       
}

So as you can see from the above code, I take in input from the user in the command line as --input and want to compare it against valid/supported options.

For example, if they input --input=valid1 --input=valid3 --input=valid2 then it will tell them "valid3 is not a supported option". I have tried embedded loops (for/foreach/etc) and comparing -- as such:

Code:
for my $i( @selections ) { 
        for my $j( @valid_options ) {
                if( $i ne $j ) { print "not valid ( $i = $j)"; exit; }
        }
}

The above is only an example and I have tried many many many different ways but it seems the caveat is that I need to loop the entire array of inputs first and only erroring if no match at all was found-- this does not satisfy me as I would like to tell the user what they have inputted is wrong and which value exactly is wrong.

In short, I want to validate a users input in comparison with what I dictate as valid options-- the current logic I have tried time and time again does not seem to work as expected because it is simply doing a not equal check which occasionally fails because it is still hitting a valid option BUT just because the two strings do not equal each other, it errors out. This is not what I want.


I hope I have made my problem clear.

EDIT: I understand that I could make this very easy for myself by using static checks but I want to make it all dynamic. For instance, if I want to add another valid input, all I do is append it to the array rather than having to go through the code and add a separate block of code (eg: if( $input == "valid3" ) { __...do this...__; } )

For example-- I do not want to have to do this:

Code:
foreach my $input( @selections ) { 
        $input = lc( $input );
        if( $input ne "valid1" and $input ne "valid2" ) { print( "Unsupported ($input)" ); }
        if( $input eq "valid1" ) { print( "Doing action for valid1" ); }
        # etc...
}

Removes the dynamics of it.
Last edited by ckozler; 07-15-2010 at 10:41 AM..
 

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LEARN ABOUT DEBIAN

libgii

libgii(7)								GGI								 libgii(7)

NAME

       libgii - A flexible library for input handling

DESCRIPTION

       LibGII  is  an  input  library developed by the GGI Project.  Its design philosophy is similar to LibGGI, which deals with graphics output.
       LibGII is based on the concept of input streams, which virtualize access to the underlying input drivers. Events from various input devices
       are  abstracted into easy-to-use structures. LibGII also allows the application to join streams together, receiving input from an arbitrary
       combination of devices.

       LibGII is a separate component from LibGGI, although LibGGI depends on LibGII for input purposes.  (LibGGI's  input  functions  are  simply
       wrappers for LibGII functions.)

ENVIRONMENT VARIABLES

       The following outlines the environment variables, intended for the user, which affect the behaviour of LibGII:

       GII_INPUT
	      The  default input source(s) and/or filter(s) to use when giiOpen() is called with a NULL argument.  The format is: input:inputargs.
	      Multiple inputs can be specified by this notation: (i1):(i2) ....
	      Note: This setting does not affect LibGGI visuals automatically opening inputs. Use the GGI_INPUTx variable instead.

       GII_DEBUG
	      The debug level for LibGII:

	      o   0 or unset : debug output is off; debugging is off

	      o   255 : all debug output is on

	      You may also bitwise 'or' any of the following together:

	      o   2   : debug core

	      o   32  : misc debugging output

	      o   64  : debug dynamic library handling

	      o   128 : debug event handling

       GII_DEBUGSYNC
	      Turn on synchronous debug output, flushing the output buffers before returning from DPRINT calls.

       GII_CONFDIR
	      Override compiled-in path to global config files (Win32 only, but not Cygwin).

       Other environment variables specific to filters and inputs are documented in the corresponding manual page.

SEE ALSO

       libgii.conf(5), filter-keytrans(7), filter-mouse(7), filter-save(7), filter-tcp(7), input-directx(7),  input-linux-kbd(7),  input-mouse(7),
       input-file(7), input-linux-mouse(7), input-tcp(7), input-linux-evdev(7), input-lk201(7).

libgii-1.0.x							    2006-12-30								 libgii(7)
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