QuickSort in Action - Sorting Strings
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I have demonstrated Quicksort using letters of the alphabet. The same function works very well with strings. To sort the list, {camera, pot, man, woman, can, people, children, girls, boys, umbrella} replace the array elements of the code as follows:
theList[0] = 'camera';
theList[1] = 'pot';
theList[2] = 'man';
theList[3] = 'woman';
theList[4] = 'can';
theList[5] = 'people';
theList[6] = 'children';
theList[7] = 'girls';
theList[8] = 'boys';
theList[9] = 'umbrella';
Run the program, and you should see the sorted elements as:
boys, camera, can, children, girls, man, people, pot, umbrella, woman
Conclusion
Quicksort is a recursive function. It splits the main list into three sub-lists: the left sub-list, the pivot (one element list) and the right sub-list. In my implementation, the left sub-list is always sorted first, before the right sub-list. So, in the function, sorting of the left sub-list is called (written) first; that is “quickSort(arr,leftLeft,leftRight)” is written before “quickSort(arr,rightLeft,rightRight).” Quicksort is very efficient for time-critical client applications.
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