# Package org.apache.sysds.runtime.frame.data.columns

Interface Summary
ArrayFactory
IHashArray

Class Summary
ABooleanArray
ACompressedArray<T>: A Compressed Array, in general does not allow us to set or modify the array.
Array<T>: Generic, resizable native arrays for the internal representation of the columns in the FrameBlock.
ArrayWrapper
BitSetArray
BooleanArray
CharArray
ColumnMetadata
DDCArray<T>: A dense dictionary version of an column array
DoubleArray
FloatArray
HashIntegerArray
HashLongArray
HashMapToInt<K>
IntegerArray
LongArray
OptionalArray<T>
RaggedArray<T>: A Ragged array for a single column contains a smaller array, only containing the values of the top most part of the This makes the allocation much better in cases where only the top n rows of a m row frame are used for the specific column.
StringArray

Enum Summary
ArrayFactory.FrameArrayType