Programmer Think

To sum up, cas (compare and swap) can be understood literally. Each time, it gets the old value from a certain memory area and compares it with the expected value. If it is equal, it is modified to a new value. If it is not equal, it will spin (While(! compareAndSwap(old,current)). Here is my website for learning spin lock https://blog.csdn ...

1, To create an anonymous pipe: #include <unistd.h> int pipe(int pipefd[2]); Function: create an anonymous pipeline for inter process communication; Parameter: int pipefd[2] this array is an outgoing parameter; pipefd[0] corresponds to the reading end of the pipeline; pipefd[1] corresponds to the write end of the pipeline; Return va ...

Zuul comes with a DebugFilter. At first, the author didn't understand the use of this DebugFilter. It's easy to understand from the name. It's used for debugging, but you can see that its source code has almost no logic, so it just set s two values. The code is as follows. @Override public Object run() { RequestContext ctx = RequestContext ...

git official link: GitHub - facebookresearch/mae: PyTorch implementation of MAE https//arxiv.org/abs/2111.06377 I can't understand the MAE code at all. I want to understand this code step by step. I think it's useful to see the great God code. This article is for notes. 1, Running example: How to say, it must be taking out the code in the ...

This article has two versions of the calculator. Below is the table of contents Let's start with the box calculator Framed calculator For this calculator, we use the Tkinter library that comes with Python # Import tkinter Library import tkinter We need to do some basic operations on the window # Get a window window = tkinter.Tk() # Se ...

subjectGive two positively ordered (from small to large) arrays of size m and n, \\\\\\\\. Please find and return the median of these two positive arrays.The time complexity of the algorithm should be O(log (m+n)).Input: nums1 = [1,3], nums2 = [2] Output: 2.00000 Explanation: merge arrays = [1,2,3] ，Median 2 Input: nums1 = [1,2], nums2 = [3, ...

S32K14X-ADC learning notes S32K14x includes two 12 bit ADC modules: ADC0 and ADC1; The S32K11x only contains a 12 bit ADC module: ADC0. 1. Number of ADC channels Each ADC supports up to 32 external analog input channels, but the exact ADC channel number appearing on the device is different from the software package shown in the table ...

Absrtact: Builder Pattern, also known as Builder Pattern, is an object construction pattern. It can abstract the construction process of complex objects (abstract categories), so that different implementation methods of this abstract process can construct objects with different representations (attributes). This article is shared from Huawei ...

After 1.4.2, the official did not make functional changes. There was no bug in word copy in 1.4.2, and other versions could not be transferred manually The background used in this article is Java. The front end is Jsp (the front end is the same. If the background language is not good, you have to do Base64 encoding and decoding by yourself) Bec ...

List of python algorithms Basic Usage car = ['audi','bmw','benchi','lingzhi'] Create a list of numbers numbers = list(range(1,4)) >>> print(numbers) [1, 2, 3] Access values in the list car = ['audi','bmw','benchi','lingzhi'] >>> print(car[0].title()) Audi >>> print(car[2].title()) Benchi #The title() method ...