From: Nathan Broadbent <nathan.f77@...>
Date: 2012-11-01T19:05:51+09:00
Subject: [ruby-core:48700] Re: [ruby-trunk - Feature #7241] Enumerable#to_h proposal

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>
> I wouldn't say it is over. See #4151.   ...

Is #each_with a better name?
>

Has anyone suggested `map_to`? I think `map_to` has a clearer intention
than `each_with`, because you're mapping the collection onto something, and
then returning it.
I don't really like the `each` part of `each_with_object`, because
`array.each` just returns the array. Since we usually use `each` to
iterate, and `map` to build an array, I think `map_to(<object>)` might make
sense.

How does this look:

  [1, 2, 3].map_to({}) { |e, hash| hash[e] = e ** 2 }


I'd also propose a `map_to_hash` method. It's longer than `map_to({})`, but
I think it's nicer to read:

  [1, 2, 3].map_to_hash { |e, hash| hash[e] = e ** 2 }


`map_to_hash(0)` would also be nicer than `map_to(Hash.new(0))`.


What do you think?

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<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I wouldn&#39;t sa=
y it is over. See #4151. =A0 ...=A0</blockquote><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex">

Is #each_with a better name?<br></blockquote><div><br></div><div>Has anyone=
 suggested `map_to`? I think `map_to` has a clearer intention than `each_wi=
th`, because you&#39;re mapping the collection onto something, and then ret=
urning it.</div>

<div>I don&#39;t really like the `each` part of `each_with_object`, because=
 `array.each` just returns the array. Since we usually use `each` to iterat=
e, and `map` to build an array, I think `map_to(&lt;object&gt;)` might make=
 sense.</div>

<div><br></div><div>How does this look:</div><div><br></div><div>=A0 [1, 2,=
 3].map_to({}) { |e, hash| hash[e] =3D e ** 2 }</div><div><br></div><div><b=
r></div><div>I&#39;d also propose a `map_to_hash` method. It&#39;s longer t=
han `map_to({})`, but I think it&#39;s nicer to read:</div>

<div><br></div><div>=A0 [1, 2, 3].map_to_hash { |e, hash| hash[e] =3D e ** =
2 }</div><div><br></div><div><br></div><div>`map_to_hash(0)` would also be =
nicer than `map_to(Hash.new(0))`.</div><div><br></div><div><br></div><div>
What do you think?</div>
</div>

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