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authorEgor Tensin <Egor.Tensin@gmail.com>2016-04-17 00:49:33 +0300
committerEgor Tensin <Egor.Tensin@gmail.com>2016-04-17 00:49:33 +0300
commit2183f3f860af34e45058ef078045322062b51f42 (patch)
tree1f61c51be301db314720fe4a945d6ddaaffa8249 /quicksort.py
parentREADME update (diff)
downloadsorting-algorithms-2183f3f860af34e45058ef078045322062b51f42.tar.gz
sorting-algorithms-2183f3f860af34e45058ef078045322062b51f42.zip
rearrange source files
* Add a useful `algorithms` package to provide convinient access to the implemented algorithms. * This allows to e.g. dynamically list available algorithms, which greatly simplifies a lot of things.
Diffstat (limited to 'quicksort.py')
-rw-r--r--quicksort.py65
1 files changed, 0 insertions, 65 deletions
diff --git a/quicksort.py b/quicksort.py
deleted file mode 100644
index b8ecc18..0000000
--- a/quicksort.py
+++ /dev/null
@@ -1,65 +0,0 @@
-# Copyright 2015 Egor Tensin <Egor.Tensin@gmail.com>
-# This file is licensed under the terms of the MIT License.
-# See LICENSE.txt for details.
-
-from random import randrange
-
-def _partition(xs, beg, end, select_pivot):
- pivot = select_pivot(xs, beg, end)
- xs[pivot], xs[end] = xs[end], xs[pivot]
- for i in range(beg, end):
- if xs[i] <= xs[end]:
- xs[i], xs[beg] = xs[beg], xs[i]
- beg += 1
- xs[beg], xs[end] = xs[end], xs[beg]
- return beg
-
-def _quicksort(xs, beg, end, select_pivot):
- if beg < end:
- pivot = _partition(xs, beg, end, select_pivot)
- _quicksort(xs, beg, pivot - 1, select_pivot)
- _quicksort(xs, pivot + 1, end, select_pivot)
-
-def _select_first(xs, beg, end):
- return beg
-
-def _select_second(xs, beg, end):
- return beg + 1
-
-def _select_middle(xs, beg, end):
- return (beg + end) // 2
-
-def _select_last(xs, beg, end):
- return end
-
-def _select_random(xs, beg, end):
- return randrange(beg, end + 1)
-
-def quicksort_first(xs):
- _quicksort(xs, 0, len(xs) - 1, _select_first)
- return xs
-
-def quicksort_second(xs):
- _quicksort(xs, 0, len(xs) - 1, _select_second)
- return xs
-
-def quicksort_middle(xs):
- _quicksort(xs, 0, len(xs) - 1, _select_middle)
- return xs
-
-def quicksort_last(xs):
- _quicksort(xs, 0, len(xs) - 1, _select_last)
- return xs
-
-def quicksort_random(xs):
- _quicksort(xs, 0, len(xs) - 1, _select_random)
- return xs
-
-if __name__ == '__main__':
- import sys
- xs = list(map(int, sys.argv[1:]))
- print(quicksort_first(list(xs)))
- print(quicksort_second(list(xs)))
- print(quicksort_middle(list(xs)))
- print(quicksort_last(list(xs)))
- print(quicksort_random(list(xs)))