Zsh Development Guide (Part 18 More Use of Built-in Modules)

Guide reading In addition to zsh/mathfunc, zsh/net/socket, zsh/net/tcp, Zsh also has some other built-in modules. In this paper, we will briefly talk about several commonly used modules. How to Use Modules # Use zmodload plus module name to load modules % zmodload zsh/mathfunc # If you don't add parameters, you can view the modules that are lo ...

Posted on Mon, 27 May 2019 17:02:14 -0700 by sawade

Implementation of tomcat session server based on memcached

brief introduction Every time we log in to Taobao, no matter on any host or mobile phone, the contents of our shopping cart will not change. How can we do that? That's by saving sessions on the server side. Usually, websites like Taobao have so many visits and there are many hosts on the server, so we don't necessarily use the same backend ...

Posted on Mon, 27 May 2019 16:54:28 -0700 by chacha102

Matplotlib Drawing Course (Advanced 2D)

1. Introduction to the experiment 1.1 Experimental Contents Matplotlib is an open source drawing library supporting Python language. Because it supports rich drawing types, simple drawing methods and perfect interface documents, it is loved by Python engineers, scientific researchers, data engineers and other people. This is Chapter ...

Posted on Mon, 27 May 2019 16:49:25 -0700 by wolves

First Understanding Core ML: Establishing a Simple Image Content Recognition Application

Reference resources: Introduction to Core ML: Building a Simple Image Recognition App Xcode 9 beta & iOS11 beta & Swift4 Core ML It is a framework that can integrate machine learning model into app. I. New Initial Project New project CoreMLDemo with single-view application template Create the following UI 2. Implementing t ...

Posted on Mon, 27 May 2019 16:48:58 -0700 by phpisawesome

JavaScript Design Patterns -- Singleton

In the eyes of traditional development engineers, a singleton is to ensure that a class has only one instance. The implementation method is usually to determine whether an instance exists or not. If there is a direct return, if there is no return, it is created and then returned, which ensures that a class has only one instance object. In Java ...

Posted on Mon, 27 May 2019 16:26:20 -0700 by welsh_sponger

QL optimization experience with twists and turns (photo edition)

background Recently, I received an SQL tuning task, which performs nearly five seconds in a month of data statistics in the development environment. Originally thought it was a smooth optimization, but I didn't expect that in order to get the best result, it went through twists and turns. First impression Initial slow SQL select case wh ...

Posted on Mon, 27 May 2019 16:13:42 -0700 by MrBiz

How to Create a Lay Data Table Quickly

Recently, the LayUI API has been updated frequently and happened to make a Demo, ready to display the table s in the project in a different way, so I started to make a basic form, first I made an effect map. HTML: <div class="row" id="divParams"> <div class="panel col-md-12"> <br /> &lt ...

Posted on Mon, 27 May 2019 15:54:54 -0700 by sun14php

How to Realize an EventBus by oneself

What is EventBus EventBus is an event publishing/subscribing framework based on the observer model. Developers can communicate between components and modules with very little code, instead of building communication bridges separately in the form of layer-by-layer transfer interfaces. This reduces the strong coupling between modules due to mult ...

Posted on Mon, 27 May 2019 15:40:57 -0700 by ashwin

Online version gray publishing strategy

        From the beginning of contact with operation and maintenance, the most pressing thing is to put the business on line. Why do you say so? It's because there are so many big pit teammates. Either because of the missing code of children's shoes developed, or because of the inadequate testing of child ...

Posted on Mon, 27 May 2019 15:24:44 -0700 by Sudden

Basic usage of git

This blogger just contacted git some time ago. Since git has not been used before, and as an ideal rookie in the front-end session, he should master the basic use of git, so he spent some time in private to learn the basic use of git. In the process of learning, he also summarized some opinions and experiences, so I will share them here. Next ...

Posted on Mon, 27 May 2019 14:41:07 -0700 by SithLordKyle