range

• Ruby has the Range object for handling a range of integers or strings. Ranges in Ruby are different than creating a range with PHP’s range function in that they are a unique object, and not a shortcut for creating an array. We create ranges in Ruby using .. or ... literal syntax.

  We can loop through the range just like we would with an array or hash using Enumerable methods such as each.

  PHP

  $sequence = range(0, 3);
  var_export($sequence);
  // => array(0 => 0, 1 => 1, 2 => 2, 3 => 3)
   
  foreach ($sequence as $item) {
      print "$item, ";
  }
  // => 0, 1, 2, 3,

  Ruby

  sequence = 0..3
  p sequence
  # => 0..3
   
  sequence.each {|item| print "#{item}, " } 
  # => 0, 1, 2, 3,

  Just like PHP, we can also create an iterable range of sequential strings.

  PHP

  $alphas = range('a', 'd');
  var_export($alphas);
  // => array(0 => 'a', 1 => 'b', 2 => 'c', 3 => 'd')
   
  foreach ($alphas as $item) {
      print "$item, ";
  }
  // => a, b, c, d,

  Ruby

  alphas = 'a'..'d'
  p alphas
  # => "a".."d"
   
  alphas.each {|item| print "#{item}, " } 
  # => a, b, c, d,

  see also

  • shuffle
  • array_fill

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