That gives 

Use of uninitialized value in split

[download]

Fix: 

%cp = map{ (split /:/)[0],  [split /,/, ((split /:/), '')[1] ] } @ex;

[download]

Note that using a string as the first argument of split is misleading, since it expects a regexp. You might as well provide a regexp directly.

In reply to Re^2: create hash with map by ikegami
in thread create hash with map by Anonymous Monk

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