From: Adam Shelly <adam.shelly@...>
Date: 2008-05-14T01:51:48+09:00
Subject: Re: hash merge

On 5/13/08, Robert Klemme <shortcutter@googlemail.com> wrote:
> On 13.05.2008 17:14, Yossef Mendelssohn wrote:
> > Thanks for teaching me about Hash#merge with a block, by the way.
> >
>
> Not really:
>
> irb(main):009:0> h = {1=>2}
> => {1=>2}
> irb(main):010:0> h.merge(10=>20) {|*a| p a}
> => {1=>2, 10=>20}
> irb(main):011:0>
>
> The block is simply ignored.
>
Not really:

irb(main):010:0> h={1,2}
=> {1=>2}
irb(main):011:0> h.merge(10=>20){|*a| p a}
=> {1=>2, 10=>20}
irb(main):012:0> h.merge(1=>20){|*a| p a}
[1, 2, 20]
=> {1=>nil}
irb(main):013:0>

The block is only called for matching keys.

-Adam