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Full Discussion: Many to many -- mapping
Top Forums Shell Programming and Scripting Many to many -- mapping Post 303022296 by vgersh99 on Wednesday 29th of August 2018 10:45:36 AM
Old 08-29-2018
it's somewhat close. Let me rewrite this short-circuit
Code:
 a[$1]=($1 in a)?a[$1] "," $2:$2

as this:
Code:
if ($1 in a)
   a[$1]=a[$1] "," $2
else
   a[$1]=$2

Hopefully the long-hand will make it easier to understand...
 

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LEARN ABOUT OSX

err_get_func

ERR_GET_LIB(3)							      OpenSSL							    ERR_GET_LIB(3)

NAME

       ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON - get library, function and reason code

SYNOPSIS

	#include <openssl/err.h>

	int ERR_GET_LIB(unsigned long e);

	int ERR_GET_FUNC(unsigned long e);

	int ERR_GET_REASON(unsigned long e);

DESCRIPTION

       The error code returned by ERR_get_error() consists of a library number, function code and reason code. ERR_GET_LIB(), ERR_GET_FUNC() and
       ERR_GET_REASON() can be used to extract these.

       The library number and function code describe where the error occurred, the reason code is the information about what went wrong.

       Each sub-library of OpenSSL has a unique library number; function and reason codes are unique within each sub-library.  Note that different
       libraries may use the same value to signal different functions and reasons.

       ERR_R_... reason codes such as ERR_R_MALLOC_FAILURE are globally unique. However, when checking for sub-library specific reason codes, be
       sure to also compare the library number.

       ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are macros.

RETURN VALUES

       The library number, function code and reason code respectively.

SEE ALSO

       err(3), ERR_get_error(3)

HISTORY

       ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are available in all versions of SSLeay and OpenSSL.

50								    2013-03-05							    ERR_GET_LIB(3)
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