From: "David A. Black" <dblack@...>
Date: 2005-10-28T22:45:40+09:00
Subject: Re: Cleaner syntax for .map (is there already a way, or ruby2 idea?)

Hi --

On Fri, 28 Oct 2005, Daniel Schierbeck wrote:

> Daniel Schierbeck wrote:
>> David A. Black wrote:
>> 
>>> I know that people.every could return
>>> some kind of generator or enumerator, which could then be fed
>>> "email_addr" symbolically... 
>> 
>> 
>> 
>> module Enumerable
>>   def every
>>     enum, obj = self, Object.new
>>     obj.define_method :method_missing do |name, *args|
>>       enum.map { |element| element.send(name, *args) }

If you must do this, you'd probably want each rather than map there.

>>     end
>>     return obj
>>   end
>> end
>> 
>> ary = ["john", "sylvia", "sarah"]
>> ary.every.capitalize!
>> 
>> puts ary.join(", ") -> John, Sylvia, Sarah
>> 
>> 
>> 
>> Cheers,
>> Daniel
>
> By the way, you need the Object#define_method if you want it to work:

I definitely *don't* want it to work :-)  I dislike using dot syntax
for non-dot semantics.  I've never liked things like:

   hash.where.the.key.equals(10)

even though they can usually be made to work.

I continue to struggle to understand what people find so horrible
about ary.each {|item| .... }, ary.map {|item| ... }, and so forth.
I'll have some more coffee and maybe I'll start to see the light....


David

-- 
David A. Black
dblack@wobblini.net