From: Zach Dennis <zdennis@...>
Date: 2004-11-05T13:21:48+09:00
Subject: Re: Cleaner way to do this?

Zach Dennis wrote:

>
> If your friend knows the processing he wants to do on the first 
> element, why not just keep it simple...
>
>
> arr = [1,2,3,4,5]
> process = proc{ |e| print e }.call( arr[0] )
> arr[1...arr.length].each do |e|
>    print ", #{e}"
> end
>
This is also faster, then doing a comparison in each iteration :

RESULTS:

---------- Capture Output ----------
"C:\ruby\bin\ruby.exe" -d harry_ohlsen.rb
WRITING 1
Took:
19.297000169754
 seconds
WRITING 2
Took: 11.7650001049042 seconds
Terminated with exit code 0

--------CODE-----------
require 'time'

arr = []
2000000.times do |i|
    arr << "abcdefghijklmnopqrstuvwxyz"
end

f = File.new( "temp.txt" , "w+" )
t = Time.new
arr.each_with_index do |x,i|
    if i==0
        f.print x
    else
        f.print ', ',x
    end  
end
f.close
puts "WRITING 1"
puts  "Took: ", (Time.new.to_f - t.to_f).to_s, " seconds"

f = File.new( "temp.txt2" , "w+" )
t = Time.new
process = proc { |e| f.print e }.call( arr[0] )
arr[1...arr.length].each do |e|
    f.print ', ',e
end
f.close
puts "WRITING 2"
print "Took: ", (Time.new.to_f- t.to_f).to_s, " seconds"