Build barcode scanner with raspberry pie 4, OLED, USB camera

Recently, at 618 discounts, I bought Raspberry Pie 4 to use as a computer for my baby.After that, I played it by myself and made a simple scanner. Raspberry Pie 4 related hardware procurement 4GB version of Raspberry Pie 4.Officially priced at $65, Jingdong 300 is reduced from 40 to 389. Micro HDMI to HDMI cable.Raspberry Pie 4 replaced the po ...

Posted on Wed, 10 Jun 2020 20:57:03 -0400 by evdawg80

Hidden scroll bar - > El scroll bar

What is El scrollbar? Element UI, as a set of well-known UI component library of Vue, is almost known by people playing Vue. Recently, when looking at the source code of element, I found an interesting phenomenon. How can I add an EL scrollbar component to autocomplete recommendations?After some understanding, it turned out to be a scroll bar c ...

Posted on Wed, 10 Jun 2020 02:13:53 -0400 by raja9911

Young Master and Girls Learn JavaIO: Buffer and Buff

brief introduction The little sister and teacher are walking farther and farther along the way to learn NIO. The only thing that can help her is to give her full support when she needs it.Say nothing. Today we're talking about NIO's basic Buffer.Old fellow gave me a Buff. What is Buffer Little sister: Brother F, this Buffer is the sentence in o ...

Posted on Tue, 09 Jun 2020 18:13:43 -0400 by ccjob2

Redis optimistic lock with golang demo

redis transaction command MULTI: Open a transaction EXEC: Transaction execution, which executes all commands within a transaction at once DISCARD: Cancel Transaction Optimistic locking using WATCH+MULTI WATCH: Monitors one or more keys, and if a key changes before the transaction executes, the transaction is interruptedUNWATCH: Suppress WATC ...

Posted on Mon, 08 Jun 2020 12:23:08 -0400 by socalnate

Glide series - glide registration module analysis

Glide registration module analysis 1, Overview 2, DataLoadProvider 1. DataLoadProviderRegistry registry 2. Registration of dataloadprovider 3. Obtaining dataloadprovider 4. Example code 3, ResourceTranscoder 1. TranscoderRegistry registry 2. Registration of resourcetranscoder 3. Access to resource ...

Posted on Sun, 07 Jun 2020 23:54:38 -0400 by violinrocker

ELK Docker integrated. net abp log4net use

This paper mainly records the use of ELK to complete the business system log collection, mainly using log4net for data entry and docking. Related connections: ELK docker img: https://hub.docker.com/r/sebp/elk Documentation: https://elk-docker.readthedocs.io/#usage Docker version installation: docker ru ...

Posted on Sun, 07 Jun 2020 23:27:30 -0400 by Jewelie

Using Python+TensorFlow2 to construct ECG recognition and classification based on convolutional neural network (CNN)

In the last article, we have preprocessed the ECG signal to smooth the noisy signal for classification. In this paper, we will formally start to use deep learning to classify and recognize ECG signals. Convolutional neural network Whether it is traditional machine learning or deep learning, the classification is based on the different featur ...

Posted on Sun, 07 Jun 2020 04:22:13 -0400 by greenCountry

ASP.NETCore MVC+Layui uses EF Core to connect MySQL for simple CRUD operations

Preface: This chapter is mainly explained by a complete exampleASP.NETCore MVC+EF Core performs a simple CRUD operation on the MySQL database, hoping to provide a complete reference instance for the buddies who are just getting started with.NET Core.aboutASP.NETThe Core MVC+EF operation MsSQL Server is detailed in the official documentation ( ...

Posted on Sat, 06 Jun 2020 21:21:06 -0400 by [ArcanE]

Customize Blog Garden Style

Welcome to Disabled Dreams Blog Park First of all, let's state this: Styles aren't all written by me, they're my own integration (feel like everyone's blog likes a little, so I integrate them myself) Since it is cumbersome to update this document every time you update your blog, this blog will only be updated regularly. If you want to use the ...

Posted on Sat, 06 Jun 2020 21:01:16 -0400 by Clarkey_Boy

Android Chart (9) - Mysterious Scatter Chart

Android Chart (9) - Mysterious Scatter Chart Today's scatter chart may not be used by many people, but it is also a clear stream in the charting industry. Let's see the actual effect. There's a little bit less data added, but it's enough to represent a scatterplot. Let's implement it first 1. Basic implementation ...

Posted on Sat, 06 Jun 2020 12:58:15 -0400 by idotcom