Kotlin actual combat [v] anomalies in kotlin

1, How kotlin throws exceptionsException handling in Kotlin is similar to that in Java or other languages. A function can end normally or throw an exception when an error occurs. The function caller catches the exception and handles it; If not, the exception is thrown up the call stack again.The basic form of exception handling statements in Ko ...

Posted by BizLab on Thu, 11 Nov 2021 23:28:49 -0800

Getting started with Servlet - file download case

22. Introduction to servlet - file download caseCase - complete file download1. Demand analysisCreate the page of file download list, click some links in the list to download the fileimg/2. File download analysis2.1 what is file download Output the existing files on the server to the client browser To put it bluntly, a copy of the server-side f ...

Posted by cpd259 on Thu, 11 Nov 2021 22:57:28 -0800

Elasticsearch asynchronous search

1. Elasticsearch asynchronous search definitionThe asynchronous Search API asynchronously executes search requests, monitors their progress, and retrieves some of the available results.The following official introduction animation can more vividly introduce asynchronous retrieval.Traditional retrieval VS asynchronous retrieval, when the amount ...

Posted by Stagnate on Thu, 11 Nov 2021 22:49:02 -0800

How does Golang language sort data efficiently?

Hello, I'm frank. Welcome to click on the blue text below the title, "Golang language development stack" to pay attention to the official account. Set as star mark to receive push articles at the first time. Scan the code at the end of the text and add groups to learn Golang language together.01introduceIn the development of Golang la ...

Posted by PhaZZed on Thu, 11 Nov 2021 22:23:17 -0800

Priority queue

catalogue Priority queue concept Characteristics of priority queues Note when using priority queues:   Construction of priority queue Operation implementation of priority queue     Priority queue concept First, a queue is a first in, first out (FIFO) Data structure of , but in some cases, The data of the operation may ...

Posted by Lambneck on Thu, 11 Nov 2021 22:10:14 -0800

20202306 Experiment 7 search and sort

#20202306 2021-2022-1 data structure and object oriented programming experiment 7 reportCourse: programming and data structureClass: 2023Name: Li JinchengStudent No.: 20202306Experimental teacher: Wang ZhiqiangExperiment date: November 12, 2021Compulsory / elective: compulsory##1. Experimental contents Define a Searching and Sorting class, ...

Posted by Sobbs on Thu, 11 Nov 2021 22:10:11 -0800

C # provides a Winform numeric keypad simulator

Before starting the article, take a look at the renderings to see if you are exactly what you need: 1, Build calculator interface It takes a lot of effort to build a better calculator interface. When I did this, I also spent two or three hours building this interface. Its main usage control is the TableLayoutPanel control. Another small d ...

Posted by zeezack on Thu, 11 Nov 2021 22:08:38 -0800

Option critical code analysis

Option critical code analysis 1.option-critic_network.py analysis a. State Network state_ The model performs three-layer convolution on the input, compresses it into a one-dimensional vector, and inputs it to the full connection layer to obtain flatted * weights4 + bias1.My understanding: this process is to extract the features in the imag ...

Posted by chawkimatta on Thu, 11 Nov 2021 22:02:29 -0800

Go language, Protobuf speed entry!

Protobuf fer is the abbreviation of Protocol Buffers. It is an extensible data description language for serializing structured data independent of language and platform. As the description language of interface specification, protobuffer can be used as the basic tool for designing secure cross language PRC interface.Basic grammarhello.proto fil ...

Posted by foid025 on Thu, 11 Nov 2021 21:57:14 -0800

Classes and objects in Java

catalogue 1, Preliminary cognition of class and object 2, Class and class instantiation 1. Basic syntax of class 2. Class instantiation 3. Member of class 3.1. Member variables / attributes 3.2 understanding 3.3 method 3, Construction method 4, Keywords 1. this keyword (1) Call the member variable through the this keyword (2) Calli ...

Posted by raku on Thu, 11 Nov 2021 21:57:10 -0800