### Different tasks of this to do plan: 1. implement NaN, undef, missing placement options. 2. Implement comparison method for complex numbers. 3. Implement multidimensional (3D and more) for sortperm https://github.com/JuliaLang/julia/issues/16273 ### Achievement check: The condition that should be met or the test that should be done to close the issue. This can be doing all the tasks.
Different tasks of this to do plan:
Achievement check:
The condition that should be met or the test that should be done to close the issue. This can be doing all the tasks.