Hi. While your solution appears to be correct the syntax you have chosen is, well, odd enough that I went cross-eyed trying to read it..

So heres my simplification 

#Initial code...
@array = (['EMBL','a','b'],['c','d'],['EMBL','e','f']);
$list = join "\n", map {${$_}[1],${$_}[2]}grep { ${$_}[0] eq "EMBL" } 
+@array;
print $list;

#first step convert the ${$_}[$index] to $_->[$index]

$list = join "\n", map { $_->[1],$_->[2] } grep { $_->[0] eq "EMBL" } 
+@array;

#second step convert to list slice

$list = join "\n", map { @{$_}[1,2] } grep { $_->[0] eq "EMBL" } @arra
+y;

#next step simplify map{}grep{} into just map{}

$list = join "\n", map { $_->[0] eq "EMBL" ? @{$_}[1,2] : () }  @array
+;

print "\nSimplified:\n$list";

[download]
Usually (yes there are exceptions) map {} grep{} or grep{} map{} can be simplified into 
map { (grep_condition) ? map_function : () }

[download]
With greater efficiency and easier understanding (er on the latter IMO :-).

Yves / DeMerphq
--
When to use Prototypes?

In reply to Re: Re: about grep.... by demerphq
in thread Mapping elements returned from a grep statement by agustina_s

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