From: Stuart Clarke <stuart.clarke1986@...>
Date: 2010-09-04T19:39:34+09:00
Subject: Ruby looping

Hey,

I have a quick query regarding loops, I am reading a CSV file take the
information from the first line of the CSV file and calling an object
which does some stuff, then I want to move on to the next line in the
CSV file and continue this process until I have done every line. My code
is as follows:

require 'csv'

file = "H:\\13936 _ Project HS\\extra tiff work\\test\\rename.csv"
#path to CSV file

def renameFile(oldID, newID)
  DO SOME STUFF
end

d = CSV.open(FILE, "r")
#Open the as CSV
d.each do |setA, setB|
#2 columns of data
    next
    oldID = setB.to_s.strip
    newID = setA.to_s.strip[/.*(?=\..+$)/]
    renameFile(oldID, newID)
#Call our object
  end
end

The above code does what I want it to but it very slow and gets slower
the bigger the CSV file, because it seems to go through each line every
time we are in the loop, when I only want it to go through the next line
in the CSV file. I basically need it to do:

line A
CALL OBJECT
skip line A do line B
CALL OBJECT
skip line A and line B do line C
CALL OBJECT
etc etc

Any help is appreciated.
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