GitLab

* add cub; array cumsum

* CSRSliceRows

* fix warning

* operator << for ndarray; CSRSliceRows

* add CSRIsSorted

* add csr_sort

* inplace coosort and outplace csrsort

* WIP: coo is sorted

* mv cuda_utils

* add AllTrue utility

* csr sort

* coo sort

* coo2csr for sorted coo arrays

* CSRToCOO from sorted

* pass tests for the new kernel changes

* cannot use inplace sort

* lint

* try fix msvc error

* Fix g.copy_to and g.asnumbits; ToBlock no longer uses CSC

* stash

* revert some hack

* revert some changes

* address comments

* fix

* fix to_block unittest

* add todo note

* add cuda utils; change g.to; add g.device

* split array.h into several headers

* cuda index select

* file

* three cuda kernels

* add cuda elementwise arith and several others

* cuda CSRIsNonZero

* fix lint

* lint

* lint

* fix bug in changing ctx to property

* address comments

* remove unused codes

* address comments