The second Spring source! XML file parsing process

Spring source code continues to open! Last article In, brother song shared with you the loading method of configuration files in Spring. If you haven't seen it yet, you must have a look at it first, which will help you better understand this article. Portal: The first part of Spring source code is open and complete! How is the configuration fil ...

Posted by MastahUK on Mon, 22 Jun 2020 05:05:50 +0200

Dynamic sql splicing in mybatis

Before moving on to dynamic sql, let's start by saying that a user's id in real development is usually out of order, such as random generation using UUID s. Write one below. public class UUIDGenerate { public static String getIdByUUID(){ return UUID.randomUUID().toString().replaceAll("-" ...

Posted by c-o-d-e on Sat, 20 Jun 2020 18:12:19 +0200

"Office Automation" Land Classification of Territory "Three adjustments", "One key" to Nanjing Classification

Recently, the practical village planning under the system of territorial spatial planning has been expanded in a large area, "three-tone" data is directly facing the problem of converting the current land use. Today, we will talk about the method of "one key" conversion through code. ...

Posted by tpc on Sat, 20 Jun 2020 04:56:20 +0200

Try to implement a simple mvvm with Proxy

A brief overview of Proxy and Reflect Proxy can be understood as setting up a layer of "interception" before the target object, through which the external access to the object must first be intercepted, so it provides a mechanism to filter and rewrite the external access. The original mean ...

Posted by deadparrot on Fri, 19 Jun 2020 12:46:44 +0200

Hash structure of data structure and algorithm (biased to JS)

Data structure (4) Note: This paper is based on the collation of BiliBili Video [JavaScript data structure and algorithm] hash table Its structure is an array. It converts hashcode into an array's subscript through a hash function Features: compared with array, advantages: insert, query and dele ...

Posted by ilikemath2002 on Fri, 19 Jun 2020 06:02:34 +0200

Building neural network

Building neural network The core of all neural networks in Python is the autograd package, which provides the mechanism of automatic derivation for all operations on tensors. It is a framework defined at runtime, which means that the back propagation is determined by how the code runs, and each itera ...

Posted by thepeccavi on Thu, 18 Jun 2020 07:30:39 +0200

hualinux servlet 2.13: ServletRequest interface and its sub interface

catalog 1, Knowledge points 2, Examples 2.1 example 1 obtaining request parameters 2.1.1 code 2.1.2 test results 2.2 example 2 returns the string array corresponding to the request parameter according to the name of the request parameter 2.2.1 in index.jsp Write form 2.2.2 modification Login. ...

Posted by chedong on Thu, 18 Jun 2020 06:37:31 +0200

How to write Vue next response? Detailed explanation of this article

preface 1. This paper will write a response principle in Vue next from scratch. Due to the difficulty of space and understanding, we will only implement the core api and ignore some boundary function points The APIs to be implemented in this article include track trigger effect reactive watch computed2. Recently, many people asked me about th ...

Posted by sorenchr on Thu, 18 Jun 2020 06:06:20 +0200

vue is absolutely dry. You can leave work early for an appointment

1. Dynamic components Two days ago, the product manager came to me with new requirements. He told me that different content should be displayed on the page according to the different permissions of users. Then I wrote out the components corresponding to different permissions, and then I used v-if to det ...

Posted by e4c5 on Thu, 18 Jun 2020 04:25:44 +0200

[Kaggle Learning Notes]| Intermediate Machine Learning

On the basis of the Intro to Machine Learning course, it explains how to deal with missing values, non-numeric data, and data leaks. Lost value handling Discard columns containing missing values directly Replace the missing value with the average value (sklearn.impute SimpleInpuer function in) Record ...

Posted by landavia on Wed, 17 Jun 2020 05:04:27 +0200