Lesson 64 - exception handling in C + + (I)

1, C + + exception handling C + + has built-in exception handling syntax element try..catch try statement handles normal code logic catch statement handling exception Exceptions in a try statement are handled by the corresponding catch statement try{ double r = divide(1,0); } catch(...){ cout << "Divide by zero ...

Posted by keenlearner on Tue, 31 Mar 2020 02:16:16 -0700

How to realize the communication between multiple tabs in the same browser (2) -- cookie+setInterval

Two, cookie (1) What is a cookie? HTTP cookies, often called cookies directly, were originally used by clients to store callback information. The standard requires the server to send a Set-CookieHTTP header to any HTTP request as a corresponding part, which contains the callback information. The browser stores such re ...

Posted by elenev on Mon, 30 Mar 2020 22:32:31 -0700

Execution environment and scope, variable object, scope chain, closure

1: Execution environment and scope and variable object   var color = "blue";   function changeColor(){     var anotherColor = "red";     // Here you can visit color and another color   }   // Only color can be accessed here   changeColor(); Execution environment is the most important concept in javascript. Each execution env ...

Posted by rmmo on Mon, 30 Mar 2020 21:49:36 -0700

Netflix Zuul service gateway of Spring Cloud series

What is Zuul    Zuul is the front door for all requests from devices and websites to the back end of the application. As an edge service application, zuul aims to realize dynamic routing, monitoring, flexibility and security. Zuul includes two main functions of request routing and filtering. Zuul is the open-source microservice gateway of Ne ...

Posted by doucie on Mon, 30 Mar 2020 21:01:30 -0700

Springboot returns json or xml or html according to the url suffix

Springboot is based on the url suffix Return json or xml; Returns html based on the suffix name. Author: liuren Copyright notice: This is an original article, following CC 4.0 BY-SA copyright agreement. Please attach the original source link and this notice for reprint. Initializing the Springboot project 1, pom.xml package introduced first ...

Posted by srdva59 on Mon, 30 Mar 2020 09:33:51 -0700

Java exception handling

1, Exception overview and exception architecture 1. Overview of exceptions In the process of using computer language for project development, even if the programmer writes the code perfectly, there are still some problems in the operation of the system, because many problems can not be avoided by the code, such as: the format of customer input ...

Posted by jeethau on Mon, 30 Mar 2020 01:43:32 -0700

Polar rabbit express bill No. query - polar rabbit Express

Preface After reading this article, copy the source code to your project, and you can quickly complete the docking of polar rabbit express interface. The effect of the interface displayed on the official website of polar rabbit express is more suitable for novices, Call the polar rabbit Express query API interface of the express bird to query ...

Posted by dk4210 on Mon, 30 Mar 2020 00:16:37 -0700

vnpy source reading learning: about app

About app In the entry program, we see gateways, apps, and various types of engines added to mainEngine.It is not difficult to guess that gateway mainly deals with external situations, interface code in all aspects, and it is not difficult to see that Engine is the core of vnpy through other people's articles, and can handle all aspects such as ...

Posted by _spaz on Sun, 29 Mar 2020 21:24:55 -0700

9. SpringCloud Chapter 9, Upgrade, Load Balancing and Service Calls Ribbon and OpenFeign

SpringCloud Chapter VIII, Upgrade, Load Balancing and Service Calls Ribbon and OpenFeign 1. Ribbon 1. Overview SpringCloud Ribbon is a set of client load balancing tools that give NetFlex Ribbon implementations. Simply put, the main function is to provide load balancing algorithms and service calls for clients.The Ribbon client componen ...

Posted by worldcomingtoanend on Sun, 29 Mar 2020 21:12:58 -0700

Architect's Inner Work, the most complex of the 23 design patterns for visitors

Visitor Pattern is a design pattern that separates data structure from data operation.It refers to the encapsulation of operations that act on various elements in a data structure. It can define new operations that act on these elements without changing the data structure. Visitor mode is called the most complex design mode and is not used freq ...

Posted by A JM on Sun, 29 Mar 2020 21:03:38 -0700