my %hash;                  # Note: you cannot use 'my' on a slice
@hash{@a} = (0) x @a;      # Initialise values to zero
@hash{@a} = undef;         # No values
@hash{@a} = @b;            # Take values from @b

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In reply to Re: use array for hash-keys without loop by cdarke
in thread use array for hash-keys without loop by piccard

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