From: 7stud -- <bbxx789_05ss@...>
Date: 2007-10-16T03:14:00+09:00
Subject: Re: big array, problems with deleting all empty items

Simon Schuster wrote:
> it seems that I have to run it a couple different times for it to
> work.. array.length = 16576, if that could be a potential problem. if
> it is, how do I work around it?
> 
> 077:0> array = File.read("/text.txt").to_a.each { |x| x.chomp! }
> 080:0> array.each_with_index { |x,y|
>     array.delete_at(y) if x.empty? == true
> }
> 
> still leaves me with plenty of empty array items
> 080:0> array[-3]
> ""

Try running this code:

arr = [10, 20, 30, 40]

arr.each_with_index do |elmt, i|
  puts elmt
  arr.delete_at(i) if elmt == 20
end

As you can see that code tries to display every element in the array. 
Does it succeed?

This convoluted code:

>  array = File.read("/text.txt").to_a.each { |x| x.chomp! }
>  array.each_with_index { |x,y|
>     array.delete_at(y) if x.empty? == true
> }

can be done more directly doing something like this:

arr = []

IO.foreach("data.txt") do |line|
  if line != "\n"
    arr << line.chomp
  end
end

puts arr

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