From: Robert Klemme <shortcutter@...>
Date: 2008-10-21T20:48:53+09:00
Subject: Re: Ruby way to take some action only once in a loop?

2008/10/21 Nobuyoshi Nakada <nobu@ruby-lang.org>:
> At Tue, 21 Oct 2008 19:07:46 +0900,
> Evgeniy Dolzhenko wrote in [ruby-talk:318215]:
>> rows = ["row1", "row2"]
>>
>> rows.each do |row|
>   if (first=true)..false and first

Amazing!

>>    write(header) # this block gets executed only once for whole loop
>>  end

Here's what I'd probably do

unless rows.empty?
  write header

  rows.each do |rw|
    write row
  end
end

Or

rows.each_with_index |row, index|
  write header if index == 0
  write row
end

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end