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Hello, I realize that this repo is 11 years old, but it is still the first result I get when I google for "Lua quicksort".
Unfortunately its current implementation does not work correctly:
I have based this fix on Rosetta stone's Quicksort in-place implementation. As a result I removed the
partition
helper function and had to change the variable names a little bit in order to make the multiple assignments less wide (which is objective) and more readable (this bit is subjective).With the fix in place, quicksort.lua now properly sorts the array: