[ruby-core:60392] Re: [ruby-trunk - Feature #8987] map/collect extension which handles arguments

On Jan 31, 2014 6:20 PM, <[e-mail]> wrote:
>
> Actually I believe the most readable form would be
>
> `p [1,2,3,4].map{ 4 + _ }  # when there is no |...|, set block params to _ `
>
> Many blocks in realworld-code are so easy, that it is really a barrier to
have to think about a name, and therefore one uses often non-verbose names
like you used x. Where is the point in being forced to think of a name,
when you don't set the name to something meaningful. I guess this was the
idea why the to_proc convention was introduced. The problem with it is,
that it is really limiting because you cannot use parameters (and the
presence of a parameter doesn't necessarily make problems so complex to
justify a name).

I guess you can solve it by syntax or by convention. I've, personally,
never had a pause when calling it 'x' or 'item', depending on the context.
You could also develop the convention of: arr.map{|_| ... }

My only problem with magic variables is that I can never remember when they
get (re)assigned. It's particularly annoying in perl, because those guys
never assign a variable when $_ will suffice.

Matthew Kerwin