I got the sense that you didn't want just the captured parts. But if you only need the $1 from each match, 

map { /^..(A|B)./ ? [ $_, $1 ] : () } @a

[download]

simplifies to 

map { /^..(A|B)./ ? $1 : () } @a

[download]

but you could also go a step further and simply use 

map /^..(A|B)./, @a

[download]

(I added this to the original post to show the options in one place.)

Seeking work! You can reach me at ikegami@adaelis.com

In reply to Re^2: do $n exist in grep? by ikegami
in thread do $n exist in grep? by misterperl

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