1, svg basic shape
The code is as follows:
<svg width="200" height="250" version="1.1" xmlns="http://www.w3.org/2000/svg">
<rect x="10" y="10" width="30" height="30" stroke="black" fill ...
Posted on Fri, 21 Feb 2020 22:24:31 -0800 by yakabod
Pandas is a NumPy based tool created to solve data analysis tasks. Pandas incorporates a large number of libraries and some standard data models, providing the tools needed to efficiently operate large datasets. Pandas provides a large number of functions and methods that enable us to process data quickly and conveniently. You will soon find th ...
Posted on Fri, 21 Feb 2020 21:52:37 -0800 by el-sid
1. Write in front
It has been more than a year and a half since the university came into contact with various web server software for more than a year. From the beginning of the freshman year, I began to toss about IIS brought by Windows computer, started my first static website, and since then started my interest in learning in the direction o ...
Posted on Fri, 21 Feb 2020 21:49:39 -0800 by taboo
Summary: Socket s, also known as sockets, are used by applications to make requests to or respond to network requests through sockets, enabling communication between hosts or between processes on a computer.
1. Socket Object
In Python, we use the socket() function to create a socket in the following s ...
Posted on Fri, 21 Feb 2020 19:52:08 -0800 by sundru
How forking works
What is forking
The life cycle of a process
forking programming ideas
Solve zombie problem
Example forking application
How multithreading works
Working ch ...
Posted on Fri, 21 Feb 2020 18:48:16 -0800 by FramezArt
shell scriptTo be precise, Shell is a command-line interpreter that follows certain syntax to interpret and pass commands into the system.It provides an interface system-level program for users to send requests to Linux to run programs. Users can use shell to start, suspend, stop, or even write some programs.Shell itself is a program written i ...
Posted on Fri, 21 Feb 2020 09:20:41 -0800 by jwhite68
There are two tables, one is the business account table and the other is the tariff table. One of the foreign keys in the business account table is the tariff type id, which refers to the primary key ID of the tariff table.
Table building statement:
create table sys_charge(
id int(11) auto_increment,
name varch ...
Posted on Fri, 21 Feb 2020 08:28:29 -0800 by Davy
1. read and write locks
In multithreading, the chance to modify public data is less, and the chance to read data is greater than rewriting. If you simply lock
It will greatly reduce the efficiency of the program, so we need a read-write lock. The characteristics of the read-write lock are "write ...
Posted on Fri, 21 Feb 2020 07:39:58 -0800 by MrAlaska
This article mainly introduces the detailed use of json module in Python 3. The editor thinks it's very good. Now I'll share it with you and give you a reference. Let's follow Xiaobian to have a look
2. Read JSON
2.1 simplest example
2.2 bytes and byte array data
2.3 cod ...
Posted on Fri, 21 Feb 2020 06:49:26 -0800 by fibonacci
This article introduces the build of Hive component in Hadoop big data platform component (MySQL needs to be built before build Hive)
Use software versionapache-hive-1.1.0-bin.tarmysql-connector-java-5.1.47.jar (Baidu cloud extraction code: vk6v)
Extract hive inst ...
Posted on Fri, 21 Feb 2020 06:06:37 -0800 by chrisuk