..  sortperm!(ix, v, [alg=<algorithm>,] [by=<transform>,] [lt=<comparison>,] [rev=false,] [initialized=false])

Like ``sortperm``, but accepts a preallocated index vector ``ix``.  If ``initialized`` is ``false``
(the default), ix is initialized to contain the values ``1:length(v)``.

See also :func:`sortperm`


See Also

find, findfirst, findin, findlast, findmin, findn, findnext, findnz, findprev, rsearch, rsearchindex, searchsorted, searchsortedfirst, searchsortedlast, sort, sort!, sortcols, sortperm, sortperm!,

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