As the others pointed out, use grep.

map evaluates the expression for each element of the list and returns it's result. In your case, since 2 elements of @allFruit do not fullfill the if-statement, for these undef is returned, so you still get 4 elements.

see grep and map for the diferences between the two.

Paul

In reply to Re: Extracting subset from list: map unsuitable? by rev_1318
in thread Extracting subset from list: map unsuitable? by loris

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