Methods Detail

• public Iterator columns()

  An iterator of the columns of the array.

  long[][] nums = [[1L, 2L], [10L, 20L]]
  assert nums.transpose() == nums.columns().toList()
  assert nums.columns().collect{ long[] col -> col.sum() } == [11L, 22L]
  

  Returns:

  the iterator

• public List flatten()

  Flattens a 2D array into a new collection. The items are copied row by row.

  Example usage:

  long[][] array = [[0, 1], [2, 3]]
  assert array.flatten() == [0, 1, 2, 3]
  

  Returns:

  a Collection of the array elements

  Since:

  5.0.0

• public long[][] transpose()

  A transpose method for 2D long arrays.

  Example usage:

  long[][] longs = [[1L, 3L, 5L], [2L, 4L, 6L]]
  long[][] expected = [[1L, 2L], [3L, 4L], [5L, 6L]]
  def result = longs.transpose()
  assert result == expected
  assert longs.class.componentType == result.class.componentType
  

  Returns:

  the transposed 2D long array

  Since:

  3.0.8