The difference and implementation principle of make and new keywords in Go language

The difference and implementation principle of make and new keywords in Go language new and make are two built-in functions, which are mainly used to create and allocate types of memory. When we define variables, we may feel a little confused. We don't know which function should be used to declare variables. In fact, their rule is very simple. ...

Added by joplinfan on Thu, 13 Jan 2022 13:07:14 +0200

Basic concepts of C language pointer

1, What is the pointer? In computer science, pointer is an object in programming language. You can use the address to find a value that points to another place in the computer memory. Since the variable unit can be found through the address, it can be simply said that the address points to the variable unit. Therefore, the address visualiz ...

Added by oneski on Thu, 13 Jan 2022 11:56:11 +0200

First knowledge of C language [3]

6 selection statement int main() { int coding = 0; printf("Please enter 0 or 1:\n"); scanf("%d",&coding); if (coding == 1) printf("true"); else printf("false"); return 0; } 7 circular statement while statementfor statementdo-while Statements int main() { int iq = 0; printf("Please enter your iq: \n"); while (scanf("%d\n" ...

Added by scoman on Thu, 13 Jan 2022 11:48:36 +0200

Goodbye if... elif... Easy to take down with Python decorator

Hello, everyone. Today, I read the code of EdgeDB[1] in Github and found that it is dealing with a large number of if elif... Else, skillfully used the decorator. The method is exquisite. Let's share it with you. Let's see what this method looks like. Suppose we want to make a function to judge the discount that a user can get according to his ...

Added by nev25 on Thu, 13 Jan 2022 09:50:32 +0200

C + + Beginner Level: introduction to basic syntax

C + + basic syntax C language is a structured language, which is not suitable for large-scale program development. Bjarne et al. Adapted to the object-oriented idea and invented a new language based on C language, called C + +. C + + is based on C language. It was originally called C with class. It added the concept of class, and then grad ...

Added by CowGuy on Thu, 13 Jan 2022 04:12:34 +0200

Broke the world record and realized automatic minesweeping in Python

Automatic minesweeping is realized with Python+OpenCV, breaking the world record. Let's take a look at the effect first. Intermediate - 0.74 sec 3BV/S=60.81 I believe many people have long known that there is such a classic game (graphics card test) play (software) as mine sweeping, and many people have heard of China's Lei Sheng. It is a ...

Added by swissbeets on Thu, 13 Jan 2022 03:33:55 +0200

Actual combat | Python easily realizes map visualization (with detailed source code)

Python has many map visualization libraries. Although the Matplotlib library is very powerful, it can only be used for static maps. Today I'm going to talk about interactive map libraries, namely pyecharts and folium. Mastering these two libraries can basically solve your map visualization needs.pyechartsFirst of all, we must talk about the pow ...

Added by devxtec on Wed, 12 Jan 2022 22:40:19 +0200

Deep parsing of String's intern al method

About String's Internal Method There are 8 basic types and a more specific type of String in the JAVA language. These types provide the concept of a constant pool to make them run faster and save memory. A constant pool is similar to a cache provided at the JAVA system level. The eight basic types of constant pools are all system-coordina ...

Added by CKPD on Wed, 12 Jan 2022 19:58:27 +0200

the Java Collections Framework

the Java Collections Framework Reference video: [QianFeng] Java Collection Framework Details BV1zD4y1Q7Fw 0. Overview of collections Purpose: Container of object, which implements common operation on object Differences from Arrays: Array length is fixed, set length is not fixed.Arrays deliberately store base and reference types, while ...

Added by Muggin on Wed, 12 Jan 2022 19:37:53 +0200

12 detailed explanation of advanced pointer in C language

Advanced pointer Character pointerArray pointerPointer arrayArray parameter passing and pointer parameter passingFunction pointerFunction pointer arrayPointer to array of function pointersCallback functionPointer and array analysis of interview questions Statement: This article is a note when learning the advanced C language. Learning cont ...

Added by jedimaster_att on Wed, 12 Jan 2022 14:55:57 +0200