From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2003-06-07T17:30:53+09:00
Subject: Re: [RCR] join block

On Sat, 07 Jun 2003 06:45:13 +0900, Joel VanderWerf wrote:

> Simon Strandgaard wrote:
>> 
>> [1, 2, 3].join {|x| "<td>#{x}</td>"}   
>> 
>>           =>   "<td>1</td><td>2</td><td>3</td>"

 
> What, you don't like the utter simplicity of the following? ;)
> 
> [1, 2, 3].map {|x| "<td>#{x}</td>"}.join

This is simple.. but when there is 30 lines between the map/join it
becomes hard to maintain.  Array#join which takes a block won't break
existing code.

 
> I guess the intermediate array is point against this, though.

I think it can be solved without intermediate array.. but yes in my
example code i use array.

 
> Somehow, I would expect Array#join to pass two args to the block, like this:
> 
>     [1,2,3].join {|x,y| x < y ? " < " : " >= " }
> 
>      # ==> "1 < 2 < 3"


me don't understand.

--
Simon Strandgaard