From: "Peña, Botp" <botp@...>
Date: 2008-04-24T18:56:26+09:00
Subject: Re: Question about array.each{|x| delete x}

From: Frisco Del Rosario [mailto:frisco@appleisp.netNO] 
# "why isn't it 1 2 3 one three 1 3?". 

a delete (of some element) on an array will really be deleted, ergo, the elements will rearrange/move to logically occupy that deleted space.

eg,
b=[1,2,3,4,5]
#=> [1, 2, 3, 4, 5]
b.delete 2
#=> 2
b
#=> [1, 3, 4, 5]

also, array#delete(obj) will delete all elements eql to obj. see below. 
now, if you combine these behaviours while walking the array itself, expect some surprises if you're not ready :)

maybe if you show the index, ruby can help you, eg

a=[1,2,3,1,1,4]
#=> [1, 2, 3, 1, 1, 4]
a.each_with_index{|x,i| a.delete x if x==1; puts "#{i} -> #{x}"}
0 -> 1
1 -> 3
2 -> 4
#=> [2, 3, 4]


# What if I wanted to make it so?

there are many better ways, but i will just modify your sample,

myArray = [1, 2, 3]
puts myArray
myArray.delete 2  #here i delete 2 first
myArray.each {|x|
  if x == 1
    then puts "one"
  elsif x == 3
    then puts "three"
  end
}
puts myArray

1
2
3
one
three
1
3

kind regards -botp