Tag：Binary
-
Time：2020-10-24
stayReview of embedded operating systemIn the task scheduling section, we mentioned the basic knowledge of μ C / OS-IIPriority bitmap algorithmThis paper introduces the principle and implementation of the algorithm in detail.Link to original text 1、Brief introduction of μ C / OS-II task priorityThere are 64 priorities in μ C / OS-II (0 ~ 63 […]
-
Time：2020-10-18
Due to the needs of the project, the front-end uses JS to compress and upload the pictures. After the images are compressed by canvas, they are transferred to blob objects and uploaded. But the file type obtained by PHP is binary stream,application/octet-streamType. Try to transfer blob to file upload in the front end, but failed, […]
-
Time：2020-10-17
The minimum number of turns of the or operation Hi, everyone. I’m a pig. Welcome to the weekly leetcode quiz of the “baby can understand” series. This is the second question in issue 171 and the 1318 in the list of questions – “the minimum number of turns of or operation” Title Description Here are […]
-
Time：2020-10-15
Write at the beginning Not to follow the trend and learn a technology, I only do the most basic introduction and practical explanation Welcome to collect front end living community:https://qianduan.life If you want to join the resource group and front-end communication group, please see the end of the article What is web assembly and can […]
-
Time：2020-10-14
What is bson? Bson is binary encoded JSON serialized data. The three features mentioned on the official website are as follows: Lighter weight Convertibility (serialization and deserialization) More efficient, because it’s binary Application of bson in mongdo driver According to the characteristics of bson mentioned above, mongodb uses bson as the main data format go.mongodb.org/mongo […]
-
Time：2020-10-7
0. Summary In the first two articles, we have learned the basic principle of binary (talk about binary (1)) and the four binary operations (talk about binary (2)). In this article, we will take a look at binary bit operation. Let’s first look at the bit operations: The table above lists all the bit operators […]
-
Time：2020-10-7
Swote provides a compiled binary package, which includes PHP. After downloading and decompressing, it can be run directly without installing PHP Download the binary package directly from this place https://www.swoole.com/page/download After downloading, unzip it to / opt / spool tar – xvf according to the official recommendation swoole.tar.xz -C /opt/swoole Write a PHP file directly […]
-
Time：2020-10-4
The original text is reprinted from “Liu Yue‘s technology blog”https://v3u.cn/a_id_173 In general, when you want to choose a base image for your Python development environment, most people will choose Alpine. Why? Because it’s too small, it’s only about 5 MB (compared with the Ubuntu series, the image is close to 100 But the truth is […]
-
Time：2020-10-2
Interesting computer book set 3 volumes “How the network is connected + how the program runs + how the computer runs”, a set of computer science books that can be understood by squatting on the toilet This book is suitable for 1. Novice programmer 2. Intermediate programmer to find and fill the gaps 3 master […]
-
Time：2020-9-27
Link to the original text: https://ssshooter.com/2020-09… The image above is from Wikipedia. IEEE-754 standard is a floating-point number standard. There are three formats: 32-bit, 64-bit, and 128 bit (the above two pictures are 32-bit and 64 bit respectively, and the structure is consistent). JavaScript uses 64 bit, which is commonly known as “double precision”. This […]
-
Time：2020-9-24
Title: starting from Huffman coding: principle and reality tags: Huffman code investment categories: Summary and understanding For the computer science class, almost all of them have learned information theory and algorithm in university stage. Information theory will talk about Shannon three theorems and Huffman coding. In algorithm class, they will learn binary tree, even haferman […]
-
Time：2020-9-17
IP address IP address is composed of a 32-bit binary number, which is usually divided into 4 bytes. The form is dotted decimal IP address. For example, 100.4.5.6 is a group of IP addresses. The four digits are decimal integers between 0 and 255. The minimum is 0 and the maximum is 255. IP address […]
