Not obnoxious at all! Healthy curiosity from a Perl newbie I'd have said.

next is a statement used inside a loop to say "skip the rest of the loop code and start the next itteration".

next if ! length $_;

is a next statement that is modified by an if. It is only executed if the if condition is true.

join concatenates the elements of a list together using the string supplied between each pair of elements.

grep filters a list of elements and only returns the list of elements for which the condition (in {} brackets) evaluates true.

Note that this is a very quick introduction to these concepts. I expect you will take a trawl through the tutorials section now looking for next, last, redo, join, grep, map and modifiers.

You should look for those key words in The Camel too.

DWIM is Perl's answer to Gödel

In reply to Re^3: Primes. Again. by GrandFather
in thread Primes. Again. by Andrew_Levenson

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