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create wedding web site create wedding web site ..@songs.length         return @songs[i] if key == @songs[i].name       end     end     return nil   end end This works, and it looks comfortingly familiar: a for loop iterating over an array.

create wedding web site What could be more natural? It turns out there is something more natural. In a way, our for loop is somewhat too intimate with the array; it asks for a length, then retrieves values in turn until it finds a match. Why not just ask the array to apply a test to each of its members? That's just what the find method in Array does. class SongList   def [](key)     if key.kind_of?(Integer)       result = @songs[key]    else       result = @songs.

create wedding web site find { |aSong| key == aSong.name }     end     return result   end end We could use if as a statement modifier to shorten the code even more. class SongList   def [](key)     return @songs[key] if key.kind_of?(Integer)     return @songs.find { |aSong| aSong.

create wedding web site name == key }  end end The method find is an iterator---a method that invokes a block of code repeatedly. Iterators and code blocks are among the more interesting features of Ruby, so let's spend a while looking into them (and in the process we'll find out exactly what that line of code in our [] method actually does).Implementing Iterators A Ruby iterator is simply a method that can invoke a block of code. At first sight, a block in Ruby looks just like a block in C, Java, or Perl. Unfortunately, in this case looks are deceiving---a Ruby block is a way of grouping statements, but not in the conventional way.

create wedding web site

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create wedding web site