Chapter IV Operational Reference Answers

Choice question: A (Uncertainty) D AC //this cannot be used in the static method, so D error; in the static initialization block, non-static members can not be directly accessed, so A is correct. BC // non-static methods must be called by object. method name, which can not be called directly, so B erro ...

Posted on Sat, 21 Sep 2019 07:15:57 -0700 by spetstnelis

30 Python Practical Codes for Instant Use

Python is one of the most popular languages. It is widely used in data science, machine learning, web development, scripting and automation. Its simplicity and ease of use make it so popular. In this article, we will introduce 30 short code snippets that you can understand and learn in 30 seconds or less. 1. Check duplicate elements The followi ...

Posted on Sat, 21 Sep 2019 03:46:55 -0700 by BVis

Data source configuration in Spring Boot (Spring Boot dbcp2 data source configuration)

Database Connection Pool Selection Algorithms By default, database connections can be automatically configured using the DataSource pool. The following is an algorithm for selecting a specific implementation: Because of the performance and concurrency of Tomcat's data source connection pool, we always give preference to Tomcat when it is avail ...

Posted on Sat, 21 Sep 2019 03:08:51 -0700 by bashaash

mybatis-plus 2.x Upgrade 3.x Notes

The main upgrades from 2.0 to 3.0 are: Upgrading JDK 8 + Optimizing Performance Wrapper Support lambda Syntax Modular MP allocates each package structure reasonably Reconstructing injection method to support any method to simplify injection mode Global Configuration Underline Conversion Eliminates Injection of AS Statements Modify Wrapper to Q ...

Posted on Sat, 21 Sep 2019 03:06:18 -0700 by alconebay

Spring Source Learning Alas, cooking by recipe is similar to AbstractAutowire Capable BeanFactory. CreateBean process.

I remember when I was in love with my wife, one day I came to cook for my wife with a whim, and did it step by step according to the recipe. As a result, I almost burned the kitchen!!! My wife still remembers this. Entrance As mentioned in the previous article, the main process of AbstractBeanFactory.getBean. Today, let's talk about the createB ...

Posted on Sat, 21 Sep 2019 02:59:19 -0700 by boiy

A Simple Analysis of OkHttp Source Analysis Request and Response Processes

This article briefly introduces OkHttp's request and response process.Article based OkHttp3.14.3 Edition 0 Preface OkHttp, as a network request library for Java programming, is of great popularity. Online articles and codes about the use, encapsulation and source code analysis of OkHttp have already been put together by hundreds of families, o ...

Posted on Fri, 20 Sep 2019 22:07:32 -0700 by Shifty Geezer

TensorFlow2.0: Basic Data Structure - Tensors

1 Introduction TensorFlow version 2.0 has been released. Although not an official version, the preview version has been released. Will the official version be far behind?Compared to version 1.X, version 2.0 of TensorFlow is not a bit and a half modified, which greatly compensates for the 1.X version of anti-human design, improves the overall u ...

Posted on Fri, 20 Sep 2019 19:51:16 -0700 by widox

java exports excel best practices, large file excel avoids OOM (memory overflow) framework-02-API

Project brief introduction IExcel Used for gracefully reading and writing excel. Avoid big excel oom, simple but not simple. Characteristic OO way to operate excel, programming is more convenient and elegant. sax mode read, SXSS mode write. Avoid excel large file OOM. Based on annotations, programming is more flexible. Writing can be b ...

Posted on Fri, 20 Sep 2019 06:18:39 -0700 by goodtimeassured

java exports excel best practices, large file excel avoids OOM (memory overflow) framework-02-API optimization

Project brief introduction IExcel Used for gracefully reading and writing excel. Avoid big excel oom, simple but not simple. Characteristic OO way to operate excel, programming is more convenient and elegant. sax mode read, SXSS mode write. Avoid excel large file OOM. Based on annotations, programming is more flexible. Writing can be based on ...

Posted on Fri, 20 Sep 2019 06:11:24 -0700 by saad|_d3vil

IOS Reactive Cocoa (RAC) Use Tutorial

Official documents ReactiveCocoa Part I: [Basic Courses] 1 Introduction As iOS developers, the code we write is almost always in response to some events, such as button click, receiving network messages, property change (KVC key observation), or changing user location through corelocation, etc. Howeve ...

Posted on Thu, 19 Sep 2019 19:48:46 -0700 by Begbie