• ## C + + function pointer description

Time：2022-5-3

The following essay explains the usage of function pointers. Definition of function pointer: Definition form: Storage type data type (* function pointer name) () meaning: The function pointer points to the program code storage area Typical use of function pointer —– implement function callback Function called through function pointer For example, the pointer of a […]

• ## Study day 26

Time：2022-3-16

C language Function pointer variable calls function When the function is compiled, the system will assign an entry address to the function, also known as the pointer (address) of the function If there is an address, a pointer variable can be defined to point to the function, and then the function can be called through […]

• ## erlang node_ Name phash conflict pit

Time：2022-2-14

summary On the line, some machines are unloaded due to the conflict of node name hash value. Of the 10 machines, the number of conflicting machines reached as many as 4. Suppose the probability of hash is average. In 10 machines, the probability of no conflict is close >>> 1 – (1.0 / (2 ** […]

• ## Rust programming video tutorial (Advanced) — 028_ 1 function pointer

Time：2021-7-23

Video address Headline address:https://www.ixigua.com/i677586170644791348…Station B address:https://www.bilibili.com/video/av81202308/ Source address GitHub address:https://github.com/anonymousGiga/learn_rus… Explanation content 1. Function pointerFunction pointers allow us to use a function as an argument to another function. The type of the function is FN, which is called a function pointer. The syntax for specifying parameters as function pointers is similar to closures. example: fn […]

• ## C + + job – derivative without library function

Time：2021-6-29

Derivation of continuous function of one variable.1) Write a function to calculate \$f (x) = SiNx\$2) Write a function to calculate \$f (x) = 2x + 1\$3) Write a function to calculate \$f (x) = \ frac {1} {1 + e ^ {- x}} \$(hint: use exp function)4) Define a function pointer type, which can […]

Time：2021-6-1

IOS bottom Exploration Series IOS bottom layer exploration – alloc & init Exploration of IOS bottom layer – calloc and ISA IOS bottom layer exploration – class IOS bottom layer exploration cache_ t IOS bottom layer exploration method IOS bottom layer exploration – message search IOS bottom layer exploration – message forwarding IOS bottom layer […]

• ## JQuery callback function

Time：2021-6-1

1. Introduction Using callback function as a parameter will greatly improve the flexibility of the program. I’m very strange to callback function. After studying the example program, I feel that I have a basic understanding of callback function, and record it for future use. 2. Definition The callback function is a pass through functionFunction pointerFunction […]

• ## Callable object

Time：2021-6-1

A successful book is not made of what is in it, but what is left out of it. ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ ㅤㅤㅤ— Mark Twain ContactC++ 2.0It’s been a while. Let’s summarizeC++What we think is a function, or something similar to a function, let’s start from standard C and C + + functions to function objects and lambda […]

• ## Summary of C function pointer syntax

Time：2021-2-2

Summary of C function pointer syntax Function pointer definition Each function occupies a section of memory unit, they have a starting address, the pointer to the function entry address is calledFunction pointer。 be careful:The essence of a function pointer is a pointer variable, and the function that the pointer points to is a pointer variableEntrance […]

• ## What are the core points of C language programming? I summarize these 20 points for you

Time：2021-1-6

Abstract:C language as an entry-level programming language, learners how to quickly grasp its core knowledge, in the face of the vast sea of books, it seems a bit confused. In order to let you quickly grasp the knowledge content of C language, the relevant knowledge points are summarized here. introduction The author has more than […]

• ## Study day 59

Time：2020-12-28

C++ Type conversion constructor Through the conversion constructor and type conversion operator to achieve type conversion The main function is to convert other types of data into objects of this type class t { public: //Explicit // prohibit implicit type conversion Explicit t (int x = 0): m (x) // type conversion constructor, which can […]

• ## How to implement a generic algorithm in Chapter 3 of essential C + +

Time：2020-10-28

The problem starts with a very simple requirement: give an integer vector and output all integers less than 10, and then we have the following function void filter(const std::vector<int> *numbers) { for (int number : *numbers) { if (number < 10) { std::cout << number << std::endl; } } } New requirement: less than the […]