Python: Implement recursive insertion sorting algorithm (with complete source code)
Insertion sort is a simple but efficient sorting algorithm. Its idea is to start from the second element and insert the element into the sorted subarray before it. This process is repeated until all elements are in order.
The recursive insertion sort algorithm is a variant of insertion sort that completes the sorting process by calling itself recursively. This article will introduce how to use Python to implement the recursive insertion sort algorithm, and provide the complete source code for reference.
The main idea of implementing the recursive insertion sort algorithm is to divide the array to be sorted into sorted and unsorted parts. Take an element from the unsorted part and insert it at the correct position in the sorted part. It then calls itself recursively, doing the same for the remaining unsorted elements, until all elements are sorted.
The following is the Python code that implements the recursive insertion sort algorithm:
def recursive_insertion_sort(arr):
# 递归结束条件
if len(arr) <= 1