Hello Monks,

We have a tricky java class with an include path list of over 3000 different directories. Naturally the program doesn't need all of these paths, but we don't know which ones are used.

We thought one solution might be to gradually go through the list, trying all combinations of up to 5 paths at once, in an attempt to find the minimal include path for the program. Eg. 
$/ = ';';
@paths = <DATA>;

foreach my $combination_listref ( &combinations_of( { min_length => 1,
+ max_length => 5, elements => \@paths }) ) {
    my @paths = @{$combination_listref};
    &test_using_paths(@paths) 
        and say 'SUCCESS WITH ' . scalar (@paths) . ' paths : ' . join
+(';', @paths)
}

__DATA__
D:\opt\tbq\J2E\JC00\exe\jenqulib.jar;D:\opt\tbq\J2E\JC00\exe\jlogunzip
+.jar;D:\opt\tbq\J2E\JC00\exe\jperflib.jar;D:\opt\tbq\J2E\JC00\exe\jst
+artup.jar;D:\opt\tbq\J2E\JC00\exe\jstartupapi.jar;D:\opt\tbq\J2E\JC00
+\exe\jstartupimpl.jar;D:\opt\tbq\J2E\JC00\exe\servicehttp\tbqmc\frog.
+jar;D:\opt\tbq\J2E\JC00\exe\servicehttp\tbqmc\tbqmc.jar;D:\opt\tbq\J2
+E\JC00\exe\servicehttp\tbqmc\tbqmcsoap.jar;D:\opt\tbq\J2E\JC00\exe\se
+rvicehttp\tbqmc\tbqmcswing.jar;D:\opt\tbq\J2E\JC00\exe\servicehttp\tb
+qmc\soapclient.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\go.jar;D:\opt\tbq\J
+2E\JC00\j2ee\admin\launcher\jaas.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\l
+ib\admin.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\bytecode.jar;D:\opt\t
+bq\J2E\JC00\j2ee\admin\lib\compilation_lib.jar;D:\opt\tbq\J2E\JC00\j2
+ee\admin\lib\com_tbq_pj_jmx.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\co
+nnector.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\ejb20.jar;D:\opt\tbq\J
+2E\JC00\j2ee\admin\lib\exception.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\l
+ib\iq-lib.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\jARM.jar;D:\opt\tbq\
+J2E\JC00\j2ee\admin\lib\jARMSat.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\li
+b\jaxrpc-api.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\jcert.jar;D:\opt\
+tbq\J2E\JC00\j2ee\admin\lib\jmonapi.jar;D:\opt\tbq\J2E\JC00\j2ee\admi
+n\lib\jms.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\jnet.jar;D:\opt\tbq\
+J2E\JC00\j2ee\admin\lib\jsse.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\j
+startupapi.jar;D:\opt\tbq\J2E\JC00\j2ee\admin\lib\jstartupimpl.jar;D:
+\opt\tbq\J2E\JC00\j2ee\admin\lib\jta.jar;

[download]
So, is there a CPAN module that can create the combinations for us? Or an enthusiastic Monk?


- Boldra

In reply to permutations and combinations - too many java class paths! by Boldra

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