# Custom Ops Examples

The following subdirectories have examples of Custom Ops.

* multiplex_1: starting example, similar to np.where
* multiplex_2: GPU (and CPU) example, similar to np.where
* multiplex_3: dispatch to special case kernel (and sparse tensors)
* multiplex_4: C++ backward compatibility example: lists of tensors
* simple_hash_table: internal state using a Resource using ref-counting
* sleep: Asynchronous (non-blocking) sleep op using AsyncOpKernel