Re: Hashes and boolean values

I thought double quoting "0/1" would result in stringification and not an actual boolean.

"0" produces a string, but that is still false in boolean context.

You should really use exists:

$hash{KEY1} = '1' unless exists $hash{KEY};
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Re^2: Hashes and boolean values by osbosb (Monk) on Jan 23, 2012 at 13:24 UTC
wouldn't that just autovivify it and then burn me later?	[reply]
Re^3: Hashes and boolean values by moritz (Cardinal) on Jan 23, 2012 at 13:26 UTC
I don't understand, I thought you wanted to set a default. Now you are afraid that setting a default will burn you? I am trying to set a hash to a default boolean value unless the hash key exists. Here's an example: That's exactly what my code does. Perl 6 - second systems done right	[reply]
Re^4: Hashes and boolean values by osbosb (Monk) on Jan 24, 2012 at 15:41 UTC
Don't mind me, I was just having a case of the "Mondays". Thanks regardless.	[reply]
Re^3: Hashes and boolean values by JavaFan (Canon) on Jan 23, 2012 at 14:12 UTC
I cannot answer whether you will burn later, but `exists $hash{foo}` will not autovivify `$hash{foo}`. Now, `exists $hash{foo}{bar}` will autovivify `$hash{foo}`, but then, so will `EXPR if $hash{foo}{bar}`.	[reply] [d/l] [select]