QuickSort is an O(nlogn) efficient sorting algorithm, serving as systematic method for placing elements of an array in order. Quicksort is a comparison sort, meaning that it can sort items of any type for which a “less-than” relation (formally, a total order) is defined. In efficient implementations it is not a stable sort, meaning that the relative order of equal sort items is not preserved. Quicksort can operate in-place on an array, requiring small additional amounts of memory to perform the sorting. It is very similar to selection sort, except that it does not always choose worst-case partition.
Below are 2 versions of the Quicksort Algorithm Implementation with Python. The first version is easy, but use more memory. The second version use the memory very efficiently.
I- QuickSort Algorithm Implementation with Python (Memory intensive version)
II- Quicksort Algorithm Implementation with Python (with Memory Optimisation)
III- QuickSort Algorithm Implementation with Python for Both Methods with duration captured
III- Most Efficient Quicksort implementation in Python on array of integer represented as string. Example: Array=[“1″,”237373737″,”3″,”1971771717171717″,”0”]
95 1 3 10 3 5
1 3 3 5 10 314159265358979323846264338327
95 Just to clarify that
lambdapart, in case someone else doesn't understand how exactly string comparison works:
'2' > '1'is
'2' > '10'is also
True, as well as
'2' > '1000'. That's why the strings are sorted by length first, because
len('2') < len('10'). IV- Build up a sorted array, one element at a time. Print the array after each iteration of the insertion sort, i.e., whenever the next element has been inserted at its correct position