The implementation mechanism of Linux 0.11 file system

#The implementation mechanism of Linux 0.11 file system ##1, Overview Linux 0.11 file system is similar to Minix 1.0 file system, which is an index file system. For Linux, everything is a file. Generally, there are common files, character device files, block device files, symbolic links, directory files ...

Added by maskme on Sun, 08 Mar 2020 06:33:49 +0200

JavaScript - node operation, DOM core, event monitoring

1. Node related operations 1.1 method of deletion Delete method of node: node.removeChild(nodes), Review the method of adding nodes: node.appendChild(nodes), 1.2 operation of replication (clone) Node assignment method: node.cloneNode(); What should be noted: Here, there are two values in the brackets of cloneNode(), one is false and the other ...

Added by spectacularstuff on Sat, 07 Mar 2020 14:13:30 +0200

Why do I use kustomize to manage Kubernetes yaml applications?

Kustomize is a tool to solve the application management problem of k8s yaml. kubectl has integrated kustomize since version 1.14. Before that, we had to install it ourselves. You can download the package of the corresponding operating system on GitHub for installation (https://github.com/kubernetes-sigs ...

Added by PakiGangsta on Tue, 03 Mar 2020 06:33:49 +0200

Data collected from A-share data analysis: stock lists and stock prices

Data is the premise of data analysis. This paper mainly describes how to use Python to collect the basic stock data of Shanghai, Shenzhen and China: stock list and stock price. 1. Stock List As we all know, for A shares, there are two exchanges in China, namely the Shanghai Stock Exchange and the Shenzhen Stock Exchange.We mainly get a list ...

Added by keeB on Sun, 01 Mar 2020 05:14:56 +0200

Threads of (detailed) tutorials on processes and threads in Python

Threading: In a process, to do many things at the same time, you need to run multiple subtasks at the same time. We call these subtasks in the process multithreading For example, to play LOL, it is only a process, but it can be controlled by mouse and keyboard. So many subtasks are operated by threads ...

Added by Strings on Thu, 27 Feb 2020 12:05:10 +0200

Practical notes on Python data analysis and machine learning Seaborn

Article directory Seaborn 1. Seaborn 2. Overall layout style setting 3. Style details 4. palette 4.1 palette 4.2 classification color board 4.3 circular drawing board 4.4 palette color settings 4.4.1 use xkcd color to name color 4.4.2 continuous color board 4.4.3 cubehelix? Palette() 4.4.4 call th ...

Added by kh411dz on Wed, 26 Feb 2020 09:04:19 +0200

android P View framework 3 - viewrootimpl

This blog mainly analyzes how ViewRoot, the manager of ViewTree, works. 1, Two way communication between ViewRootImpl and WMS ViewRootImpl > WMS: IwindowSession WMS > ViewRootImpl: Iwindow Iwindonsession and Iwindow are anonymous bindservers. 1. The process of viewrootimpl getting the hand ...

Added by amyhughes on Wed, 26 Feb 2020 07:56:50 +0200

The summary of C++ template

The summary of C++ template This article is a project summary file developed around class templates. We share some details about the use of class templates and easy to ignore when using classes. For example, the member variable of a class is the processing method in the constructor and destructor whe ...

Added by johnsmith153 on Tue, 25 Feb 2020 14:33:50 +0200

JAVA code runs different records when debug ging and running

Although I met such a problem once when I started to learn JAVA, I didn't pay attention to recording the problem at that time, and after talking with the teacher, I couldn't get over it. This time I encountered such a problem, which is still very scary. After all, if we can't even trust the debug tool, ...

Added by Lol5916 on Tue, 25 Feb 2020 09:17:45 +0200

FIO installation deployment and test method case

I/O input / output, read and write, cache and raid can improve storage IO performance. IOPS (Input/Output Operations Per Second), that is, the number of I/O operations per second, is mostly used in database, storage and other occasions to measure the performance of random access. The IOPS performan ...

Added by vahidi on Tue, 25 Feb 2020 06:38:17 +0200