数据结构和算法是程序员的内功心法和基本功。无论是人工智能还是其它计算机科学领域,掌握扎实的数据结构和算法知识,往往会助力不少!今天给大家推荐一份不错的数据结构与算法资源。特点是:全代码实现!
这份资源的作者王争老师是前 Google 工程师,5 万+人跟着学的《数据结构和算法之美》专栏作者。他总结了程序员必备的 50 个数据结构与算法,以及相应的代码实现。开源地址为:
""" Bubble sort, insertion sort and selection sort 冒泡排序、插入排序、选择排序 Author: Wenru """ from typing import List # 冒泡排序 def bubble_sort(a: List[int]): length = len(a) if length <= 1: return for i in range(length): made_swap = False for j in range(length - i - 1): if a[j] > a[j + 1]: a[j], a[j + 1] = a[j + 1], a[j] made_swap = True if not made_swap: break # 插入排序 def insertion_sort(a: List[int]): length = len(a) if length <= 1: return for i in range(1, length): value = a[i] j = i - 1 while j >= 0 and a[j] > value: a[j + 1] = a[j] j -= 1 a[j + 1] = value # 选择排序 def selection_sort(a: List[int]): length = len(a) if length <= 1: return for i in range(length): min_index = i min_val = a[i] for j in range(i, length): if a[j] < min_val: min_val = a[j] min_index = j a[i], a[min_index] = a[min_index], a[i] def test_bubble_sort(): test_array = [1, 1, 1, 1] bubble_sort(test_array) assert test_array == [1, 1, 1, 1] test_array = [4, 1, 2, 3] bubble_sort(test_array) assert test_array == [1, 2, 3, 4] test_array = [4, 3, 2, 1] bubble_sort(test_array) assert test_array == [1, 2, 3, 4] def test_insertion_sort(): test_array = [1, 1, 1, 1] insertion_sort(test_array) assert test_array == [1, 1, 1, 1] test_array = [4, 1, 2, 3] insertion_sort(test_array) assert test_array == [1, 2, 3, 4] test_array = [4, 3, 2, 1] insertion_sort(test_array) assert test_array == [1, 2, 3, 4] def test_selection_sort(): test_array = [1, 1, 1, 1] selection_sort(test_array) assert test_array == [1, 1, 1, 1] test_array = [4, 1, 2, 3] selection_sort(test_array) assert test_array == [1, 2, 3, 4] test_array = [4, 3, 2, 1] selection_sort(test_array) assert test_array == [1, 2, 3, 4] if __name__ == "__main__": array = [5, 6, -1, 4, 2, 8, 10, 7, 6] bubble_sort(array) print(array) array = [5, 6, -1, 4, 2, 8, 10, 7, 6] insertion_sort(array) print(array) array = [5, 6, -1, 4, 2, 8, 10, 7, 6] selection_sort(array) print(array)