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how to merge Hash

by jesuashok (Curate)
on Jan 20, 2006 at 13:03 UTC ( #524456=perlquestion: print w/replies, xml ) Need Help??

jesuashok has asked for the wisdom of the Perl Monks concerning the following question:

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Re: how to merge Hash
by osunderdog (Deacon) on Jan 20, 2006 at 13:11 UTC

    %newHash = (%hash1, %hash2);

    Hazah! I'm Employed!

Re: how to merge Hash
by blazar (Canon) on Jan 20, 2006 at 13:35 UTC
    my %merge=(%hash1, %hash2); # ? # how 'bout key clashes? my %merge2=(%hash2, %hash1); # will be different => MORE DETAILS - MORE DETAILS!!

    PS: letting apart the fact that the question -if I understood it correctly- is extremely trivial and -still if I understood it correctly- I'd recommend reading some introductory perl document or tutorial before proceeding, I find that your "code" didn't help - to understand correctly your question. If you have some real (pseudo-)code that is suitable to illustrate a problem, then show it, else do not contribute to line noise: help people to help you!

Re: how to merge Hash
by marto (Cardinal) on Jan 20, 2006 at 13:12 UTC
Re: how to merge Hash
by QM (Parson) on Jan 22, 2006 at 16:42 UTC
    Or even
    @hash1{keys %hash2} = values %hash2;
    However, if there are any common keys, the last value assigned will be retained.

    Quantum Mechanics: The dreams stuff is made of

      can you please explain me the above code when you assigned the values of %hash2 to @hash1 how it is reflecting in %hash1

        There is no array "@hash1" there is only the hash "%hash1".

        This is called a hash slice , and in a quirk of perl syntax uses the @ sigil instead of %

        my %foo; @foo{ 'hash', 'slices' } = ( 'use', 'curly braces' );

        my @bar; @bar[ 1,2,3,4 ] = ( 'array', 'slices', 'use', 'square brackets' );

        Say it with me:

        { 'hashes', 'are', 'curly', 'ones' }

        [ 'arrays', 'are', 'square' ]

        ( 'lists are round' )

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