Getting started with Go language - process control

go process control String explanation String principle The bottom layer of string is a byte array, so it can be converted to and from [] byte type Characters in a string cannot be modified String is composed of byte, so the length of string is the length of byte The run type (int32 in four bytes) is used to represent utf8 characters. A run co ...

Posted by fredted40x on Sat, 14 Mar 2020 08:37:41 -0700

Java IO details -- byte stream and character stream

1, Byte stream overview Byte stream is divided into byte output stream and byte input stream Byte stream directly operates on binary data; byte stream is generally used to operate on media files, such as pictures 2, Byte output stream outputStream in java is an abstract class that controls ...

Posted by ashton321 on Sat, 14 Mar 2020 06:18:19 -0700

Classification algorithm - K-nearest neighbor algorithm (with case and test data)

One definition If most of the k most similar samples in the feature space belong to a certain category, then the sample also belongs to this category. 1.1 distance formula The distance between two samples can be calculated by the following formula, also called Euclidean distance II. Analysis of fi ...

Posted by aclees86 on Sat, 14 Mar 2020 04:17:16 -0700

Understanding of SurfaceFlinger (12) in Android GUI system

Link to the general outline of this series of articles: surface flinger series of articles of Android GUI system Summary & description of key points in this chapter: The mind map of this chapter is as above. This paper mainly introduces the concept of FrameBuffer, mainly focuses on the basic ...

Posted by russia5 on Fri, 13 Mar 2020 22:37:38 -0700

Surface flinger (01) display system framework of Android GUI system

Link to the general outline of this series of articles: surface flinger series of articles of Android GUI system Summary & description of key points in this chapter: The mind map of this chapter is as above. It mainly describes the basis of the display system, understands the relationship be ...

Posted by ChaosXero on Fri, 13 Mar 2020 22:22:55 -0700

The summary of js anti shake and throttle

In recent projects, the test proposed that clicking the button quickly for many times would trigger multiple calls of the interface. Later, when querying the data, you can use the anti shake optimization, which just integrates the use of anti shake and throttling for your own learning Code: <!DOCTYPE html> <html> <head> ...

Posted by shamuraq on Fri, 13 Mar 2020 03:24:07 -0700

bmp image graying and binarization

C language removes the background of bmp picture I. Preface 2, Grayscale Header file C file 3, Binarization I. Preface In image processing, most of the processing methods need to convert color image into gray image in advance to carry out relevant calculation and recognition. The principle of ...

Posted by robb73 on Thu, 12 Mar 2020 06:05:26 -0700

C language project - imperial concubine selection system - day 3 - end

Because the epidemic can only watch online classes at home. After learning C language for a few days, I plan to find a project. Today is the third day of this project. If you want to see the previous content, you can go to my same column to find it Project: imperial concubine selection system Six ...

Posted by SL-Cowsrule on Thu, 12 Mar 2020 05:42:59 -0700

Dynamically update Linux system password and send SMS to remind

Dynamically update Linux system password and send SMS to remind Sometimes we may need higher security. As the mainstream operating system of the server, Linux needs to change the root password of the system account frequently to ensure the security of the whole system. The importance of the password i ...

Posted by DJ Zen Masta K on Thu, 12 Mar 2020 05:05:50 -0700

NO.89 - Applying Xgboost to Predict Insurance Compensation

Article Directory 1 Data analysis 1.1 First look at what the data looks like 1.2 Continuous and categorical variables 1.3 Number of attributes in categorical variables 1.4 Compensation value 1.5 Continuous Variable Characteristics 1.6 Correlation between features 2 Xgboost 2.1 Data Preprocessing 2.2 ...

Posted by rimelta on Wed, 11 Mar 2020 21:00:47 -0700