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insert_sort.py
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insert_sort.py
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#!/usr/bin/env python
#-*- encoding: UTF-8-*-
"""
* Copyright © https://github.com/jarry All rights reserved.
* @author: jarryli@gmail.com
* @version: 1.0
"""
import time
'''
# 插入排序标准通用版
'''
def insert_sort1(arr):
l = len(arr)
for i in range(l):
j = i - 1
current = arr[i]
# 将该项自右往左与已排序项逐个对比，当遇到比自己大的项时，将该位置右移
# 直到遇到小于等于自己的项则停止移动，表示插入成功
print('i=' + str(i), ' j=' + str(j), 'current=' + str(current),
'arr[i]=' + str(arr[i]), 'arr[j]=' + str(arr[j]), 'arr[]=', arr)
while (j >= 0 and current < arr[j]):
# 逐个位移
arr[j + 1] = arr[j]
j -= 1
# 交换为当前项
arr[j + 1] = current
return arr
'''
# 插入排序利用list insert函数插入选择项
'''
def insert_sort2(arr):
l = len(arr)
is_min = False
for i in range(l):
j = i - 1
current = arr[i]
print('current:', current)
is_min = True
print('i=' + str(i), ' j=' + str(j), 'current=' + str(current),
'arr[i]=' + str(arr[i]), 'arr[j]=' + str(arr[j]), 'arr[]=', arr)
while j >= 0:
if (current > arr[j]):
# 利用insert插入
arr.insert(j + 1, current)
is_min = False
break
j -= 1
if (is_min):
arr.insert(0, current)
arr.pop(i)
return arr
'''
# 插入排序利用list insert函数插入最大项
'''
def insert_sort3(arr):
l = len(arr)
new_arr = [arr[0]]
for i in range(1, l):
isMax = True
for j in range(len(new_arr)):
print('i=' + str(i), ' j=' + str(j), 'arr[i]=' + str(arr[i]),
'new_arr[j]=' + str(new_arr[j]), 'new_arr[]=', new_arr)
if arr[i] < new_arr[j]:
# 新建数组来插入到某个位置中
new_arr.insert(j, arr[i])
isMax = False
break
if (isMax == True):
new_arr.append(arr[i])
print('new_arr:', new_arr)
return new_arr
'''
# 插入排序新建数组版倒序遍历
'''
def insert_sort4(arr):
l = len(arr)
new_arr = [arr[0]]
for i in range(1, l):
is_min = True
new_len = len(new_arr)
while (new_len > 0):
new_len -= 1
print('i=' + str(i), ' new_len=' + str(new_len),
'arr[i]=' + str(arr[i]),
'new_arr[new_len]=' + str(new_arr[new_len]), 'new_arr[]=', new_arr)
if arr[i] > new_arr[new_len]:
new_arr.insert(new_len + 1, arr[i])
is_min = False
break
if is_min == True:
new_arr.insert(0, arr[i])
print('new_arr:', new_arr)
return new_arr
# test
arr1 = [7, 11, 9, 10, 12, 13, 8]
start_time = time.time()
print(insert_sort1(arr1))
print("time:" + str((time.time() - start_time) * 1000) + " ms")
arr2 = [7, 11, 9, 10, 12, 13, 8]
start_time = time.time()
print(insert_sort2(arr2))
print("time:" + str((time.time() - start_time) * 1000) + " ms")
arr3 = [7, 11, 9, 10, 12, 13, 8]
start_time = time.time()
print(insert_sort3(arr3))
print("time:" + str((time.time() - start_time) * 1000) + " ms")
arr4 = [7, 11, 9, 10, 12, 13, 8]
start_time = time.time()
print(insert_sort4(arr4))
print("time:" + str((time.time() - start_time) * 1000) + " ms")
"""
jarrys-MacBook-Pro:insert_sort jarry$ python insert_sort.py
('i=0', ' j=-1', 'current=7', 'arr[i]=7', 'arr[j]=8', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('i=1', ' j=0', 'current=11', 'arr[i]=11', 'arr[j]=7', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('i=2', ' j=1', 'current=9', 'arr[i]=9', 'arr[j]=11', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('i=3', ' j=2', 'current=10', 'arr[i]=10', 'arr[j]=11', 'arr[]=', [7, 9, 11, 10, 12, 13, 8])
('i=4', ' j=3', 'current=12', 'arr[i]=12', 'arr[j]=11', 'arr[]=', [7, 9, 10, 11, 12, 13, 8])
('i=5', ' j=4', 'current=13', 'arr[i]=13', 'arr[j]=12', 'arr[]=', [7, 9, 10, 11, 12, 13, 8])
('i=6', ' j=5', 'current=8', 'arr[i]=8', 'arr[j]=13', 'arr[]=', [7, 9, 10, 11, 12, 13, 8])
[7, 8, 9, 10, 11, 12, 13]
time:0.168800354004 ms
('current:', 7)
('i=0', ' j=-1', 'current=7', 'arr[i]=7', 'arr[j]=8', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('current:', 11)
('i=1', ' j=0', 'current=11', 'arr[i]=11', 'arr[j]=7', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('current:', 9)
('i=2', ' j=1', 'current=9', 'arr[i]=9', 'arr[j]=11', 'arr[]=', [7, 11, 9, 10, 12, 13, 8])
('current:', 10)
('i=3', ' j=2', 'current=10', 'arr[i]=10', 'arr[j]=9', 'arr[]=', [7, 9, 9, 10, 12, 13, 8])
('current:', 12)
('i=4', ' j=3', 'current=12', 'arr[i]=12', 'arr[j]=10', 'arr[]=', [7, 9, 9, 10, 12, 13, 8])
('current:', 13)
('i=5', ' j=4', 'current=13', 'arr[i]=13', 'arr[j]=12', 'arr[]=', [7, 9, 9, 10, 12, 13, 8])
('current:', 8)
('i=6', ' j=5', 'current=8', 'arr[i]=8', 'arr[j]=13', 'arr[]=', [7, 9, 9, 10, 12, 13, 8])
[7, 8, 9, 9, 10, 12, 8]
time:0.189781188965 ms
('i=1', ' j=0', 'arr[i]=11', 'new_arr[j]=7', 'new_arr[]=', [7])
('i=2', ' j=0', 'arr[i]=9', 'new_arr[j]=7', 'new_arr[]=', [7, 11])
('i=2', ' j=1', 'arr[i]=9', 'new_arr[j]=11', 'new_arr[]=', [7, 11])
('i=3', ' j=0', 'arr[i]=10', 'new_arr[j]=7', 'new_arr[]=', [7, 9, 11])
('i=3', ' j=1', 'arr[i]=10', 'new_arr[j]=9', 'new_arr[]=', [7, 9, 11])
('i=3', ' j=2', 'arr[i]=10', 'new_arr[j]=11', 'new_arr[]=', [7, 9, 11])
('i=4', ' j=0', 'arr[i]=12', 'new_arr[j]=7', 'new_arr[]=', [7, 9, 10, 11])
('i=4', ' j=1', 'arr[i]=12', 'new_arr[j]=9', 'new_arr[]=', [7, 9, 10, 11])
('i=4', ' j=2', 'arr[i]=12', 'new_arr[j]=10', 'new_arr[]=', [7, 9, 10, 11])
('i=4', ' j=3', 'arr[i]=12', 'new_arr[j]=11', 'new_arr[]=', [7, 9, 10, 11])
('i=5', ' j=0', 'arr[i]=13', 'new_arr[j]=7', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=5', ' j=1', 'arr[i]=13', 'new_arr[j]=9', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=5', ' j=2', 'arr[i]=13', 'new_arr[j]=10', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=5', ' j=3', 'arr[i]=13', 'new_arr[j]=11', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=5', ' j=4', 'arr[i]=13', 'new_arr[j]=12', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=6', ' j=0', 'arr[i]=8', 'new_arr[j]=7', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' j=1', 'arr[i]=8', 'new_arr[j]=9', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('new_arr:', [7, 8, 9, 10, 11, 12, 13])
[7, 8, 9, 10, 11, 12, 13]
time:0.335931777954 ms
('i=1', ' new_len=0', 'arr[i]=11', 'new_arr[new_len]=7', 'new_arr[]=', [7])
('i=2', ' new_len=1', 'arr[i]=9', 'new_arr[new_len]=11', 'new_arr[]=', [7, 11])
('i=2', ' new_len=0', 'arr[i]=9', 'new_arr[new_len]=7', 'new_arr[]=', [7, 11])
('i=3', ' new_len=2', 'arr[i]=10', 'new_arr[new_len]=11', 'new_arr[]=', [7, 9, 11])
('i=3', ' new_len=1', 'arr[i]=10', 'new_arr[new_len]=9', 'new_arr[]=', [7, 9, 11])
('i=4', ' new_len=3', 'arr[i]=12', 'new_arr[new_len]=11', 'new_arr[]=', [7, 9, 10, 11])
('i=5', ' new_len=4', 'arr[i]=13', 'new_arr[new_len]=12', 'new_arr[]=', [7, 9, 10, 11, 12])
('i=6', ' new_len=5', 'arr[i]=8', 'new_arr[new_len]=13', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' new_len=4', 'arr[i]=8', 'new_arr[new_len]=12', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' new_len=3', 'arr[i]=8', 'new_arr[new_len]=11', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' new_len=2', 'arr[i]=8', 'new_arr[new_len]=10', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' new_len=1', 'arr[i]=8', 'new_arr[new_len]=9', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('i=6', ' new_len=0', 'arr[i]=8', 'new_arr[new_len]=7', 'new_arr[]=', [7, 9, 10, 11, 12, 13])
('new_arr:', [7, 8, 9, 10, 11, 12, 13])
[7, 8, 9, 10, 11, 12, 13]
time:0.219106674194 ms
"""