In the data structure computer experiment, the teacher asked to construct a Huffman tree Huffman code, output the Huffman code form of the string, and restore the Huffman code to a string based on a piece of ciphertext. The overall idea is as follows Header file #include <stdio.h> #include <string.h> #define N 50 #define M […]
Tag: encoding
8. Data structure-string, encoding set
Coding table Chinese coding table ? Mapping of numbers to Chinese single characters. Chinese characters can only use multi-byte 2 bytes, and there are always 65535 states. Common Chinese encodings include GB2312, GBK, GB18030, and BIG 5. ? All encoding tables are compatible with single-byte ASCII tables. UNICODE ? Multi-byte, one encoding table solves the […]
Technical breakdown | Why does Redis use different encodings internally?
One weekend night, I suddenly received a wave of alarms about increased time consumption. After a closer look at the alarm message, it turned out that a slow check request occurred, which caused a significant increase in cluster time consumption. At this time, business students also received alarms that upstream services were affected. During the […]
Construction, encoding and decoding of Huffman trees
1. Question requirements: According to the principle of Huffman coding, write a program to find the Huffman code based on the user’s input node weights and decode the given code. (1) Initialization: Enter a string from the keyboard (or read a file), count the characters that appear and the frequency of each character, use the […]
C++ multi-threading to achieve decoding and encoding synchronization
The first format conversion process was to input and decode a frame, then encode the frame and then output it. It was found that the input decoding and encoding output parts do not interfere with each other, so we can design two threads to implement decoding and encoding. Improve efficiency at the same time. Principle […]
JS anti-debugging bypass & JS code obfuscation & JSFUCK encoding
JS anti-debugging bypass & amp;JS code obfuscation & amp;JSFUCK encoding If there are relatively confidential things in the JS code of the target website, anti-debugging will be enabled, and the code will obfuscate these functions to prevent the leakage of confidential data. Let’s talk about several methods to bypass the JS anti-debugging function of the […]
Encoding and decoding using BASE64
Directory of series articles SpringBoot integrates RabbitMQ and implements message sending and receiving Parse JSON format parameters & modify the key of the object VUE integrates Echarts to achieve simple data visualization Using BigDecimal in Java to perform operations such as addition, subtraction, multiplication, and division on string values List＜HashMap＜String,String＞＞implement custom string sorting (key sorting, […]
Complete step-by-step video encoding and decoding using the FFmpeg open source library under windows
Final decoding effect: 1.UI design 2. Enter the default value in the control properties window 3. Copy the compiled FFmpeg library to the same directory as the project 4. Reference the FFmpeg library and header files in the project 5. Link the specified FFmpeg library 6. Use the FFmpeg library Reference header file extern “C” […]
Data compression – Huffman text reading encoding matlab
1. Introduction to Huffman coding Huffman coding is a variable length coding (VLC, variable length coding) method. Compared with fixed-length ASCII coding, Huffman coding can save a lot of space because the frequency of each character is not consistent; consistent; It is an entropy coding algorithm used for lossless data compression. It is usually used […]
Huffman tree, Huffman encoding/decoding
Huffman tree Basic introduction to Huffman trees Illustration of Huffman tree construction steps Create Huffman tree code implementation “”” Create Huffman tree “”” classEleNode: “”” Node class “”” def __init__(self, value: int): self.value = value self.left = None # Point to the left child node self.right = None # Point to the right child node […]