Flutter learning note 04: Dart data type

One of the most basic characteristics of programming language is the data types it supports. These are the types of values that can be represented and manipulated in programming languages. The Dart language supports the following types: 1. Number int, double 2. String 3. bool 4. List (similar to array) ...

Posted on Sat, 06 Jun 2020 00:07:34 -0700 by msandersen

aop implementation of spring framework

1. What is AOP AOP(Aspect Oriented Programming) means: face-to-face programming, a technology to realize the only maintenance of program functions through precompiling and runtime dynamic agent. AOP is the continuation of OOP, a hot spot of software development, an important content of spring framewor ...

Posted on Fri, 05 Jun 2020 21:49:15 -0700 by jmgrhm

Coprocess swoole vs. golang

COOPERATION CONCEPT Coroutines are a lighter existence than threads, just as a process can have multiple threads, a thread can have multiple threads. A collaboration has the following characteristics User-state execution, completely controlled by the program, not managed by the operating system kernel Suitable for handling IO-intensive task ...

Posted on Fri, 05 Jun 2020 10:07:33 -0700 by dvidunis

ROS notes using keyboard to control the movement of models in gazebo

Use the model in the previous note to control the movement with the keyboard in gazebo. Familiar with ROS communication mode. After a little time groping and searching for data, we found that there are still many unreasonable places in the model design, such as leg freedom, no specified materials, weigh ...

Posted on Fri, 05 Jun 2020 02:42:29 -0700 by ScubaDvr2

java socket programming for client and server to receive information

java socket programming for client and server to receive information #Learning Notes/Programming/socket tcp/IP Four-Layer Model Link Layer: Data Physical Layer, Optical Fiber, Network Cable, etc. Network layer: Used to group transmitted data and assign it to the appropriate computer or port Tran ...

Posted on Thu, 04 Jun 2020 12:45:15 -0700 by anf.etienne

No doubt!This is the clearest article to explain Java.I/O streaming

Table of Contents Simple combing Understand File streams are the basis of io streams, involving buffer streams, which are operations that use io streams in memory. Conversion streams, as the name implies, are conversions between bytes and character streams., to have byte stream and character stream first, object stream, the most important is ...

Posted on Wed, 03 Jun 2020 09:25:29 -0700 by d~l

actix-web wrap_fn() middleware intercepts the request method.

After asking about stack overflow, no one answered. Finally, I found the relevant examples in the code comments. After modification, they are as follows: #![allow(clippy::type_complexity)] use actix_service::Service; use actix_web::{web, App, HttpServer, HttpRequest}; use futures::future::FutureExt; use actix_web::{http, Error, HttpResponse}; ...

Posted on Wed, 03 Jun 2020 09:13:01 -0700 by navinj

[share] ApiPost common methods collection of pre (post) execution script

This paper mainly introduces the common response parameter variables and common method sets in the pre execution script and post execution script of API post, an interface management tool. About ApiPost: ApiPost is an API debugging and management tool that supports team collaboration and can generate documents directly. It supports the simul ...

Posted on Wed, 03 Jun 2020 07:53:07 -0700 by Kevin3374

Analysis of Spring Boot Autoconfiguration Principle for Springboot Series

Articles have been included in Github.com/niumoo/JavaNotes Welcome to Star and Instructions. Welcome to my attention Public Number , articles are updated weekly. Note: This Spring Boot series of articles is based on Spring Boot version v2.1.1.RELEASE for learning analysis, which may vary slightly from version to version. Preface About what ...

Posted on Mon, 01 Jun 2020 18:20:40 -0700 by atoboldon

Talkshow programming builder mode

Builder Pattern The construction process of complex objects is separated, so that different implementation methods of this abstract process can construct different objects (properties). motivation The builder pattern can separate a part from its assembly process and create a complex object step by step. Users only need to specify the type of ...

Posted on Sun, 31 May 2020 01:04:19 -0700 by calmchess