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Selection Sort - О(n²)
Selection sort is an in-place comparison sort algorithm. It is inefficient and performs worse than many other sorting algorithms like merge sort. Nevertheless, it is very simple and can be used for sorting small amounts of data.
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RadixSort Algorithm in Java
Radix sort is a non comparing sort. It's performance is O(kn), where k is the maximum number of digits in inputs's decimal representation. It uses a queue to store number for each decimal digit. At each pass, it simply classifies inputs depending on the current decimal digit, starting from the least significant one.
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Merge Sort O(n log n)
Merge sort is an O(n log n) comparison-based sort algorithm. In most implementations it is stable, meaning that it preserves the input order of equal elements in the sorted output. The algorithm uses the a divide and conquer algorithmic paradigm.
Invented by John von Neumann in 1945.
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Merge Sort in Java
Merge sort is a popular sorting algorithm with running time of O(n long n). It recursively splits the array in parts, sorts each part, then merges them. This strategy is known as divide an conquer algorithm.
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Merge Sort demo in Python
Merge sort tutorial in python. Most lines are documented.
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Java QuickSort
Quick sort is very famous and efficient algorithm for sorting an arbitrary array. It first partitions the array with any pivot value then sorts each partitions recursively. It has worst case running time of O(n^2). But, an average case running time of O(n log n). Quick sort even out performs other sorting algorithms that have average case running time of O(n log n).
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BucketSort in Java
Bucket sort is a non-comparing sorting algorithm. It can be very efficient for sorting closed small ranged numbers. Because, it running time is O(dn), where d is the difference between minimum and maximum input value. It uses queue as bucket for each position. If the numbers are arbitrary without any range or the range is too high, this sorting algorithm is not preferred. Because, it will take huge amount of memory for inputs with large range.
