Re^3: How to check if a variable's value is equal to a member of a list of values

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Re^4: How to check if a variable's value is equal to a member of a list of values by LanX (Saint) on Mar 25, 2013 at 15:36 UTC
> I was not previously familiar with the ability to suck an entire array into a hash it's called "hash slice"! see perldata#Slices > using this method, how would I set each hash key to a defined static value? assign a list of same length `DB<156> @array=1..5 => (1, 2, 3, 4, 5) DB<157> @hash{@array} = ('my val') x @array => ("my val", "my val", "my val", "my val", "my val") DB<158> \%hash => { 1 => "my val", 2 => "my val", 3 => "my val", 4 => "my val", 5 => + "my val" }` [download] Cheers Rolf ( addicted to the Perl Programming Language) UPDATE for completeness TIMTOWTDI: `$hash{$_}="my val" for @array` has less of a memory footprint. and `my %hash = map { $_ => "my val" } @array;` is DRYer and makes sure the whole hash is reinitiated.	[reply] [d/l] [select]
Re^4: How to check if a variable's value is equal to a member of a list of values by choroba (Cardinal) on Mar 25, 2013 at 15:37 UTC
You have to provide a list of values on the right hand side. For example, you can try: `@hash1{@array} = ('value') x @array; @hash2{@array} = 0 .. $#array;` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l]
Re^5: How to check if a variable's value is equal to a member of a list of values by cls33 (Novice) on Mar 25, 2013 at 16:30 UTC
Hm... makes sense. But how do I handle it if I don't know the size/length of the array? Do I really have to check that and then programmatically build an array in a loop? Or is there a syntactical shortcut?	[reply]
Re^6: How to check if a variable's value is equal to a member of a list of values by choroba (Cardinal) on Mar 25, 2013 at 16:35 UTC
I do not understand. In my examples, the size of the array is not hardcoded, it is dynamically computed from @array in the scalar context or $@array. لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]

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