Basic knowledge points involved in this article C++ algorithm: principles, source code and test cases of prefix sum, prefix product, prefix XOR including course videos dichotomy Title Give you an integer array stations with subscripts starting from 0 and length n, where stations[i] represents the number of power supply stations in the i-th city. Each […]
Tag: sum
[Practical Combat-08] Flink consumes kafka custom serialization
Purpose Let the data consumed from kafka be directly converted into our objects mvn pom <!– Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, […]
Implementing the producer-consumer pattern using Python multi-threading
What is the producer consumer pattern In the process of software development, we often encounter such scenarios: Some modules are responsible for producing data, which are processed by other modules (the modules here may be: functions, threads, processes, etc.). The module that generates data is called a producer, and the module that processes data is […]
Gin framework-A summary of problems encountered in running the terminal and their solutions (1)
1. panic: html/template: pattern matches no files: `template/**/**/*` Terminal full text code: 10:3:12 app | [GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached. [GIN-debug] [WARNING] Running in “debug” mode. Switch to “release” mode in production. – using env: export GIN_MODE=release – using code: gin.SetMode(gin.ReleaseMode) 10:3:13 app | panic: html/template: […]
An in-depth introduction to RabbitMQ: sequential consumption, dead letter queue and delay queue
1. RabbitMQ 1.1 Core Components RabbitMQ is an open source message middleware that implements the Advanced Message Queuing Protocol (AMQP) and provides various important components to support the production, transmission and consumption of messages. Producer: The producer is the sender of messages and is responsible for publishing messages to the RabbitMQ server. Messages can contain […]
Prefix sum, difference, two-dimensional prefix sum, two-dimensional difference
Prefix sum Function: interval query Definition: prefix and array predix[n], original array a[n], the relationship between them is Interval query: Find the sum of elements between a[left] to a[right]: p[right] – p[left-1] template: #include<iostream> using namespace std; #define int long long const int N = 1e5 + 5; int a[N]; int prefix[N]; signed main() { […]
FreeRTOS task creation and deletion, suspension and resumption
1. Create BaseType_t xTaskCreate( TaskFunction_t pxTaskCode, const char* const pxName, const uint16_t usStackDepth, void* const pvParameters, UBaseType_t uxPriority, TaskHandle_t* const pxCreateTask) This function is mainly used to create tasks. It creates tasks in a dynamic way. The space and stack size used by tasks created by the dynamic task creation function are managed by FreeRTOS. […]
React project structure summary
React project structure summary Simply record the dependencies and implementations used in the current React project After exploring for more than half a year, I have probably built a system that is relatively easy to use…? Basically, it should be said that it can handle most projects. Dependencies used The project is currently still in […]
Assembly language: summing decimal numbers of arbitrary length
1. Question requirements Enter the sum of two decimal numbers of any length (within 20 digits) on the keyboard. Use “-” to identify negative numbers. Positive numbers can be left unsigned or added with a “+” sign. (Assembly language programming environment used: Masm for Windows integrated experimental environment 2012.5) 2. Question Analysis This question requires […]
Use Arthas to analyze Java online interface time consumption
Project scenario In a production environment, it is often necessary to troubleshoot where in an interface is time-consuming. According to the previous practice, it may be by printing the logger, then patching and redeploying. @Test void testNeedTime() {<!– –> long startTime = System.currentTimeMillis(); AtomicInteger num1 = new AtomicInteger(1); IntStream.range(1,10).forEach(i-> num1.incrementAndGet()); long endTime1 = System.currentTimeMillis(); log.info(“Time […]