From: Rodrigo Rosenfeld Rosas <rr.rosas@...>
Date: 2012-04-14T03:16:59+09:00
Subject: [ruby-core:44343] Has Hash#slice inclusion already been discussed in bugs.ruby-lang.org?

This is a multi-part message in MIME format.
--------------090008050408030005040400
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

I find this method very useful:

http://as.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Hash/Slice.html

I don't mean its exact implementation, but it would be a short-hand to:

def slice(*keys)
   select {|k, v| keys.include? k} # talking about the idea only, not 
performance
end

Or maybe it could be defined as having a little bit different output 
when the keys are not found in the original hash:

def slice(*keys)
     keys.each_with_object({}){|k, h| h[k] = self[k] } # of course, this 
is a simplification as the initial object should use the same 
default/default_proc
end

Sorry, but I couldn't find any references to any issue discussing this.

If this has been already discussed, could you please point me to the 
original issue discussion?

Cheers,
Rodrigo.

--------------090008050408030005040400
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    I find this method very useful:<br>
    <br>
    <meta http-equiv="content-type" content="text/html;
      charset=ISO-8859-1">
    <a
href="http://as.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Hash/Slice.html">http://as.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Hash/Slice.html</a><br>
    <br>
    I don't mean its exact implementation, but it would be a short-hand
    to:<br>
    <br>
    def slice(*keys)<br>
    &nbsp; select {|k, v| keys.include? k} # talking about the idea only, not
    performance<br>
    end<br>
    <br>
    Or maybe it could be defined as having a little bit different output
    when the keys are not found in the original hash:<br>
    <br>
    def slice(*keys)<br>
    &nbsp;&nbsp;&nbsp; keys.each_with_object({}){|k, h| h[k] = self[k] } # of course,
    this is a simplification as the initial object should use the same
    default/default_proc<br>
    end<br>
    <br>
    Sorry, but I couldn't find any references to any issue discussing
    this.<br>
    <br>
    If this has been already discussed, could you please point me to the
    original issue discussion?<br>
    <br>
    Cheers,<br>
    Rodrigo.<br>
  </body>
</html>

--------------090008050408030005040400--