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Simple Sorting

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This chapter is from the book


  • The sorting algorithms in this chapter all assume an array as a data storage structure.

  • Sorting involves comparing the keys of data items in the array and moving the items (actually, references to the items) around until they're in sorted order.

  • All the algorithms in this chapter execute in O(N2) time. Nevertheless, some can be substantially faster than others.

  • An invariant is a condition that remains unchanged while an algorithm runs.

  • The bubble sort is the least efficient, but the simplest, sort.

  • The insertion sort is the most commonly used of the O(N2) sorts described in this chapter.

  • A sort is stable if the order of elements with the same key is retained.

  • None of the sorts in this chapter require more than a single temporary variable, in addition to the original array.

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