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Full Discussion: Number of arguments to array - Perl Script
Top Forums Shell Programming and Scripting Number of arguments to array - Perl Script Post 302760563 by Skrynesaver on Thursday 24th of January 2013 08:25:34 AM
Old 01-24-2013
If this is in a Perl script you may need to fix a couple of things, I suspect you mean the get_add routine to look like
Code:
sub get_add{
    my @args=@_;
    my $num_args=@args;
    my$last_index=$#args;
    ...
    return $some_value;
}
...
get_add(arg1,arg2,arg3,arg4,arg5, ... ,argN);

Prototypes in Perl are not for the uninitiated, a subroutine is defined with the sub keyword, work around the snippet above and see if it's what you need.

---------- Post updated at 01:25 PM ---------- Previous update was at 01:13 PM ----------

When you call a routine with a list of arguments, you are passing an array to the routine in the special array @_.

In order to determine the number of arguments using a regular expression, you would first have to join them with a sufficiently unique key and then parse them out with the regex, this seems...strange.

Could you specify your problem more clearly, or if it is coursework, move the conversation to that forum filling all the required fields.

Regards, Skrynesaver
This User Gave Thanks to Skrynesaver For This Post:
Syed Imran
 

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LEARN ABOUT CENTOS

afquery

AFQUERY(3)																AFQUERY(3)

NAME

       afQuery, afQueryLong, afQueryDouble, afQueryPointer - query the capabilities of the Audio File Library

SYNOPSIS

       #include <audiofile.h>

       AUpvlist afQuery (int querytype, int arg1, int arg2, int arg3, int arg4);

       long afQueryLong (int querytype, int arg1, int arg2, int arg3, int arg4);

       double afQueryDouble (int querytype, int arg1, int arg2, int arg3,
	   int arg4);

       void *afQueryPointer (int querytype, int arg1, int arg2, int arg3,
	   int arg4);

PARAMETERS

       querytype can be one of the following:

       o    AF_QUERYTYPE_FILEFMT

       o    AF_QUERYTYPE_INST

       o    AF_QUERYTYPE_INSTPARAM

       o    AF_QUERYTYPE_COMPRESSION

       o    AF_QUERYTYPE_COMPRESSIONPARAM

       o    AF_QUERYTYPE_MISC

       o    AF_QUERYTYPE_MARK

       o    AF_QUERYTYPE_LOOP

       arg1, arg2, arg3, and arg4 are integer selectors whose meaning depends upon querytype.

RETURN VALUE

       Upon success, afQuery will return a non-null AUpvlist value. Upon failure, afQuery will return null while afQueryLong and afQueryDouble
       will return -1 and afQueryPointer will return null.

       Pointers representing character strings are owned by the Audio File Library and must not be freed; all other pointer values must be freed
       by the caller.

DESCRIPTION

       For AF_QUERYTYPE_FILEFMT, the following selectors are valid values for arg1:

       AF_QUERY_LABEL
	   Request a short label string for the format (e.g., "aiff").

       AF_QUERY_NAME
	   Request a short name for the format (e.g., "MS RIFF WAVE").

       AF_QUERY_DESC
	   Request a descriptive name for the format (e.g., "Audio Interchange File Format").

       AF_QUERY_IMPLEMENTED
	   Request a boolean value indicating whether the format is implemented for reading and writing in the Audio File Library.

       AF_QUERY_ID_COUNT
	   Request the total number of formats implemented.

       AF_QUERY_IDS
	   Request an integer array of the id token values of all implemented file formats.

       AF_QUERY_COMPRESSION_TYPES
	   Used with the selector AF_QUERY_VALUE_COUNT in arg2, this will return a long integer containing the number of compression schemes
	   available for use within the format specified in arg3. Used with selector AF_QUERY_VALUES, it returns a pointer to an integer array
	   containing the compression id values of the compression schemes supported by the format specified in arg3.

       AF_QUERY_SAMPLE_FORMATS
	   Used with the selector AF_QUERY_DEFAULT in arg2, this will return the default sample format for the file format specified in arg3.

       AF_QUERY_SAMPLE_SIZES
	   Used with selector AF_QUERY_DEFAULT in arg2, this will return the default sample width for the file format specified in arg3.

       For AF_QUERYTYPE_INST, the following selectors are valid for arg1:

       AF_QUERY_SUPPORTED
	   Request a boolean value indicating whether the file format in arg2 supports instruments.

       AF_QUERY_MAX_NUMBER
	   Request an integer value indicating the maximum number of instruments supported by the file format in arg2.

       For AF_QUERYTYPE_INSTPARAM, the following selectors are valid for arg1:

       AF_QUERY_SUPPORTED
	   Request a boolean value indicating whether the file format in arg2 supports instrument parameters.

       AF_QUERY_ID_COUNT
	   Request an integer value indicating the number of instrument parameters supported by the file format in arg2.

       AF_QUERY_IDS
	   Request an integer array containing the instrument parameter values for the file format in arg2.

       AF_QUERY_TYPE
	   For the file format in arg2, request the type of the instrument parameter in arg3.

       AF_QUERY_NAME
	   For the file format in arg2, request the name of the instrument parameter in arg3.

       AF_QUERY_DEFAULT
	   For the file format in arg2, request the default value of the instrument parameter in arg3.

ERRORS

       afQuery can produce the following errors:

       AF_BAD_QUERYTYPE
	   The query type is unsupported.

       AF_BAD_QUERY
	   The arguments to the query are bad.

AUTHOR

       Michael Pruett <michael@68k.org>

Audio File Library 0.3.6					    03/06/2013								AFQUERY(3)
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