From: Tobias Reif <tobiasreif@...>
Date: 2002-01-13T01:28:34+09:00
Subject: Re: Changes to block behavior in ruby 1.6.6

Niklas Frykholm wrote:


> So blocks have to be passed explicitly to sub-methods, like this:
> 
>     def a; yield 1; end
>     def b(&p); a(&p); end
>     b {|x| puts x}
> 


I'm on Win, and have 1.6.5 only.

Does this

----------8<----------
    def upto limit,modifier=:default
      number,step =
      case modifier
        when :even    then [2,2]
        when :odd     then [1,2]
        when :default then [1,1]
      end
      while number <= limit
        yield number
        number += step
      end
    end

    upto 7 do |number|
      print number
    end
    print "\n"
    upto 7,:even do |number|
      print number
    end
    print "\n"
    upto 7,:odd  do |number|
      print number
    end

    # 1234567
    # 246
    # 1357
----------8<----------

run in 1.6.6?

or do I have to write

----------8<----------
def upto limit,modifier=:default,&block
   number,step =
    case modifier
      when :even    then [2,2]
      when :odd     then [1,2]
      when :default then [1,1]
    end
   while number <= limit
     block.call number
     number += step
   end
end

upto 7 do |number|
   print number
end
print "\n"
upto 7,:even do |number|
   print number
end
print "\n"
upto 7,:odd do |number|
   print number
end

# 1234567
# 246
# 1357
----------8<----------

then?

TIA,
Tobi

-- 
http://www.pinkjuice.com/