Method: Chainer::Dataset::Convert._concat_arrays_with_padding

Defined in:
lib/chainer/dataset/convert.rb

._concat_arrays_with_padding(arrays, padding, device) ⇒ Object 



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# File 'lib/chainer/dataset/convert.rb', line 53

def self._concat_arrays_with_padding(arrays, padding, device)
  xm = device.xm
  if Chainer.array?(arrays[0]) and arrays[0].ndim > 0
    xm = Chainer.get_array_module(arrays[0])
    shape = xm::Int32.cast(arrays[0].shape)
    arrays[1..-1].each do |array|
      if xm::Bit.[](shape != array.shape).any?
        shape = xm::Int32.maximum(shape, array.shape)
      end
    end
  else # Integer
    shape = []
  end

  shape = shape.insert(0, arrays.size).to_a
  if Chainer.array?(arrays[0]) and arrays[0].ndim > 0
    result = arrays[0].class.new(shape).fill(padding)
  else # Integer
    result = xm::Int32.new(shape).fill(padding)
  end

  arrays.size.times do |i|
    src = arrays[i]
    if Chainer.array?(src) and src.ndim > 0
      result[i, 0...src.shape[0], 0...src.shape[1]] = src
    else # Integer
      result[i] = src
    end
  end

  result
end