Programmer Think

background With the increasing business volume, the division of database is becoming more and more detailed, and the concept of sub database and sub table is also gradually implemented. The generation of primary key ID such as auto increase primary key or sequence no longer meets the demand, so the ...

Requirement Combine the following two pictures to produce panoramic mosaic effect. Code implementation process 1. Import required libraries import numpy as np import cv2 2. Create a class Stitcher The Stitcher class contains five methods, which are stitch(self, images, ratio=0.75, reprojThresh ...

C Array Arrays are sequential collections that store a series of variables of the same type.All arrays consist of contiguous memory locations. Declare Array You need to specify the type and number of elements type arrayName [ arraySize ]; Initialize Array //The number of values between braces { ...

Explanation of lab2a experiment 1. raft structure complementary field of raft.go.Fields should be as close as possible to Figure2 from raft's paper. type Raft struct {     mu        sync.Mutex          // Lock to protect shared access to this peer's state     peers     []*labrpc.ClientEnd // RPC end points of all peers     persister *Persister ...

Chapter VI indicators 1. Count the number of integers [problem description] input a string, including numeric and non numeric characters, such as: a123x456 17935? 098tab, take the consecutive numbers as an integer, store them in array a in turn, count the total number of integers, and output these n ...

This article was originally written because there was an interview in the reboot group, and the written examination question had this question. I don't know how to do it, what kind of thinking, so I sent it to everyone in the group for discussion I've thought about it for a moment. Let's briefly talk about my idea. Of course, there is also a ve ...

Seven sorting algorithms Direct insert sort Selection sort Selection sort Bubble sort Quick sort Merge sort Heap sort Direct insert sort When the I (I > = 1) element is inserted, the preceding array[0],array[1] , array[i-1] has been ordered. At this time, use the sorting code of array[i] and ...

In the iOS development process or user feedback, you may often see this situation. When you use it, you will crash. When you check the crash stack in the background, you cannot find the crash log. In fact, most of this may be due to the system's low memory crash, that is, oom (another possibility is tha ...

Queue + matrix + linked list problem Cat dog queue Rotation print matrix (rotation matrix) . zigzag printing matrix Finding numbers in a matrix with ordered rows and columns Print a common part with two ordered linked lists Determine whether a linked list is a palindrome mechanism Divide the unidirec ...

Vulkan's inherent functions Vulkan's inherent functionality, early graphics API s provided default state in many stages of a graphics rendering pipeline. In Vulkan, from the size of the viewport to the color mixing function, you need to do everything by yourself. In this chapter we will fill in all th ...