From: Phrogz <phrogz@...>
Date: 2007-12-12T02:34:59+09:00
Subject: Re: While statements in ruby

On Dec 11, 10:25 am, Mark Mr <pimea.m...@gmail.com> wrote:
> Hi guys, I have a probably simple question. I dont know how to do
> iteration loops in ruby that reference more than one item of an array or
> more than one array. Here's an example of what I would do in php. Can
> anyone convert this to ruby? Thanks :)
>
> while ($i=0; $i < $response_table.length; $i += 2) {
>
> <td> $response_table[$i] </td>
> <td> $response_table[$i + 1] </td>
>
> }
>
> or something like this would work too if i made an array for questions
> and a separate one for answers

  irb(main):001:0> a = %w| a b c d e f |
  => ["a", "b", "c", "d", "e", "f"]

  irb(main):005:0> a.each_with_index{ |val, i|
  irb(main):006:1*   print val, a[i+1], "\n"
  irb(main):007:1> }
  ab
  bc
  cd
  de
  ef
  fnil

  irb(main):009:0> require 'enumerator'
  irb(main):011:0> a.each_cons(2){ |x,y|
  irb(main):012:1*   print x, y, "\n"
  irb(main):013:1> }
  ab
  bc
  cd
  de
  ef

  irb(main):014:0> b = %w| 1 2 3 4 5 6 |
  => ["1", "2", "3", "4", "5", "6"]

  irb(main):015:0> a.zip(b)
  => [["a", "1"], ["b", "2"], ["c", "3"], ["d", "4"], ["e", "5"],
["f", "6"]]

  irb(main):016:0> a.zip(b).each{ |alpha, num|
  irb(main):017:1*   print alpha, num, "\n"
  irb(main):018:1> }
  a1
  b2
  c3
  d4
  e5
  f6