Re: Adding hash values together

Hashes stringify keys, and uses string comparisons to compare keys. That means:

$hash{20}      = 1;  # Same as $hash{'20'}  = 1;
$hash{2e1}     = 2;  # Same as $hash{'20'}  = 2;
$hash{'2e1'}   = 3;  # Same as $hash{'2e1'} = 3;
$hash{'2E1'}   = 4;  # Same as $hash{'2E1'} = 4;
$hash{0+'2e1'} = 5;  # Same as $hash{'20'}  = 5;
$hash{0+'2E1'} = 6;  # Same as $hash{'20'}  = 6;

# '2E1' => 4, '2e1' => 3, '20' => 6
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Update: Changed the wording in the comments to avoid further confusion.

Comment on Re: Adding hash values together Download Code

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Re: Adding hash values together by MonkPaul (Friar) on Jun 30, 2005 at 18:06 UTC
I dont really understand where you are coming from in your example: do you mean that the string literal can cause some over writing in the hash key or something completely different ??? MonkPaul	[reply]
Re^2: Adding hash values together by ikegami (Patriarch) on Jun 30, 2005 at 18:19 UTC
I meant that `20`, `024`, `0x14`, `2e1` and `2E1` will all stringify to `'20'`, and therefore are all equal when used as keys. However, `'20'`, `'024'`, `'0x14'`, `'2e1'` and `'2E1'` are already strings, so they are all considered unequal if used as keys.	[reply] [d/l] [select]