array_chunk

• This function’s solution will only work within the context of the Rails framework.

  We can split an array into separate chunks in Rails using the Array#in_groups_of method.

  PHP

  $animals = array('ant', 'bat', 'cat', 'dog', 'elk');
  $result = array_chunk($animals, 3);
  var_export($result);
  // => array(0 => array(0 => 'ant', 1 => 'bat', 2 => 'cat'),
  //          1 => array(0 => 'dog', 1 => 'elk'))

  The default Rails implementation of in_groups_of will fill any missing elements with nil.

  Rails

  animals = ["ant", "bat", "cat", "dog", "elk"]
  p animals.in_groups_of(3)
  # => [["ant", "bat", "cat"], ["dog", "elk", nil]]

  To get the same results as our PHP version, we need to pass false as the second argument to in_groups_of.

  Rails

  animals = ["ant", "bat", "cat", "dog", "elk"]
  p animals.in_groups_of(3, false)
  # => [["ant", "bat", "cat"], ["dog", "elk"]]

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