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Re: RFC: Self Assessment Perlby davido (Cardinal) |
| on Sep 06, 2018 at 17:03 UTC ( [id://1221890]=note: print w/replies, xml ) | Need Help?? |
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Definedness: Explain the difference between false and undefined. Show how to test for each. Hashes: Show how to test for the existence of a hash key. Autovivification: Show how to fetch the value in $foo->{'bar'}->{'baz'} without causing $foo->{'bar'} to spring into existence if it didn't exist to begin with. Sorting: Show how to sort "foo123", "bar123", "baz345", "baz123" numerically first, alphabetically second. List manipulation: Show how to find how many times the number 5 exists in map {int(rand(6)+1)} 1..20. Dave
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