Programmer Think

preface iOS crash is a headache for iOS developers. App crashes, indicating that there is a problem in code writing. It is very important to quickly locate the crash site. It's easier to find the problem in the debugging phase, but it's more troublesome to analyze the crash report of the app that has been launched. This article will summarize a ...

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 ...

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("-" ...

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. ...

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 ...

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 ...

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 ...

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. ...

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 ...

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 ...