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Re: Re: adding to a hash

by Fastolfe (Vicar)
on May 13, 2003 at 23:49 UTC ( [id://257935] : note . print w/replies, xml ) Need Help??

in reply to Re: adding to a hash
in thread adding to a hash

Remember that = is an assignment operator, not an addition or concatenation operator. When you use it, you are telling Perl to set the left-hand side equal to the right-hand side. All entries in the hash will be replaced.

You have two options: You can either iterate through the replacement key/value pairs and set the $hash{$key} = $value, or if your list of keys and values are known ahead of time, a hash slice might let you make a change to a group of hash entries with one statement (e.g. @hash{@new_keys} = @new_values).