https://www.chenshaowen.com/en/tags/go/Recent content in Go on Shaowen Chen's WebsiteHugo -- gohugo.ioen©2016 - {year}, All Rights Reserved.Sat, 13 May 2023 00:00:00 +0000weeklyhttps://www.chenshaowen.com/en/blog/get-webassembly-programs-using-go.htmlSat, 13 May 2023 00:00:00 +0000Sat, 13 May 2023 00:00:00 +0000https://www.chenshaowen.com/en/blog/get-webassembly-programs-using-go.html1. Introduction to WebAssembly Cross-platform: it can run on any platform that supports WebAssembly, including web browsers, servers, and mobile devices High performance: it uses a compact binary format that can be loaded and parsed quickly in the browser, improving application performance Security: it uses a sandbox model that isolates the code running inside it, protecting the system from malicious code微信公众号GoWebAssemblyFrontendR&Dhttps://www.chenshaowen.com/en/blog/developing-istio-wasm-plugin-by-tinygo.htmlWed, 22 Feb 2023 01:00:00 +0000Wed, 22 Feb 2023 01:00:00 +0000https://www.chenshaowen.com/en/blog/developing-istio-wasm-plugin-by-tinygo.htmlwasme only supports up to Istio 1.9, while I am using Istio 1.14, so this post goes straight to tinygo for verification and learning. 1. Installing tinygo Requirements Go v1.18+ Install tinygo 1 2 brew tap tinygo-org/tools brew install tinygo Check the version 1 2 3 tinygo version tinygo version 0.微信公众号tinygoIstioWasmCloud NativeService MeshR&DGoLearningExtensionhttps://www.chenshaowen.com/en/blog/the-tips-of-time-and-tz-in-go.htmlTue, 07 Dec 2021 00:00:00 +0000Tue, 07 Dec 2021 00:00:00 +0000https://www.chenshaowen.com/en/blog/the-tips-of-time-and-tz-in-go.html1. Time and Time Zones 1.1 Time Standards UTC, Coordinated Universal Time, is the current time standard, counted by atomic time. GMT, Greenwich Mean Time, is the older time standard, which defines the moment the sun passes over the Royal Observatory in Greenwich, on the outskirts of London, as 12 noon.微信公众号GoR&DTimeTime Zonehttps://www.chenshaowen.com/en/blog/building-and-using-go-private-packages.htmlThu, 24 Jun 2021 00:00:00 +0000Thu, 24 Jun 2021 00:00:00 +0000https://www.chenshaowen.com/en/blog/building-and-using-go-private-packages.html1. Create a Go Modules Project Create the directory 1 2 mkdir go-test cd go-test Initialize the package 1 2 3 4 5 go mod init gitlab.private.com/shaowenchen/go-test go: creating new go.mod: module gitlab.private.com/shaowenchen/go-test go: to add module requirements and sums: go mod tidy Add the business code main.go 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 package main import ( "github.微信公众号GoGetting StartedBuildR&Dhttps://www.chenshaowen.com/en/blog/practical-algorithm-of-bloom-filter.htmlTue, 01 Dec 2020 00:00:00 +0000Tue, 01 Dec 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/practical-algorithm-of-bloom-filter.html1. What Is Bloom Filter A Bloom Filter is a data structure proposed by Bloom in 1970. It maps elements (x, y, z) through a series of functions into a binary vector (a 0101 sequence), and is used to quickly determine whether an element w is in a set. As shown below (from Wikipedia):微信公众号AlgorithmsR&DGoOptimizationBloom Filterhttps://www.chenshaowen.com/en/blog/let-us-start-learning-go-6.htmlFri, 04 Sep 2020 00:00:00 +0000Fri, 04 Sep 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/let-us-start-learning-go-6.html1. Interface-Oriented Programming 1.1 Characteristics Interface-oriented programming emphasizes interaction between modules through interfaces. First, the caller specifies a set of method signatures; then, the callee implements that set of methods. What sets interface programming apart from other programming styles is that it focuses on methods, not attributes. In many programming scenarios, methods are defined around attributes.微信公众号GoLet's Learn GoInterfaceLearninghttps://www.chenshaowen.com/en/blog/let-us-start-learning-go-5.htmlThu, 03 Sep 2020 00:00:00 +0000Thu, 03 Sep 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/let-us-start-learning-go-5.html1. The Concurrency Model in Go 1.1 The Communication Model: CSP CSP stands for Communicating Sequential Process, a model for concurrent communication. A Process can use many Channels, and a Channel does not care who is using it — it is only responsible for sending and receiving data. In the Go community there is a very famous maxim: do not communicate by sharing memory; instead, share memory by communicating.微信公众号GoConcurrencyParallelismGoroutineChannelLearningLet's Learn Gohttps://www.chenshaowen.com/en/blog/what-is-functional-programming.htmlWed, 02 Sep 2020 00:00:00 +0000Wed, 02 Sep 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/what-is-functional-programming.html1. What a Programming Paradigm Is A programming paradigm is a class of typical programming conventions. On one hand, it provides engineers with a way to model entities, linking the physical world to code; on the other hand, it provides engineers with a way of thinking about code and programs.微信公众号Functional ProgrammingGoProgramming ParadigmPythonWhat Ishttps://www.chenshaowen.com/en/blog/incomplete-data-using-base64-decoding-jwt-playload.htmlMon, 08 Jun 2020 00:00:00 +0000Mon, 08 Jun 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/incomplete-data-using-base64-decoding-jwt-playload.htmlWhen Base64-decoding a JWT, I found that the JSON data was incomplete. This article mainly introduces the relevant knowledge and solves this problem. 1. Introduction to JWT JWT passes authentication by setting Authorization: Bearer <token> in the Header. A JWT Token is a Base64-encoded string joined by dots, something like微信公众号GoJWTEncodingBase64SecurityR&Dhttps://www.chenshaowen.com/en/blog/how-to-develop-a-operator-using-kubebuilder.htmlWed, 25 Sep 2019 00:00:00 +0000Wed, 25 Sep 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/how-to-develop-a-operator-using-kubebuilder.htmlWith the Operator approach, Kubernetes functionality can be extended in a friendly way. Operator = CRD + Controller. First you generate the CRD from a yaml definition, then the Controller continuously watches the data in etcd and performs the corresponding actions. There is a lot of tedious and repetitive work involved in developing an Operator.微信公众号KubernetesGoOperatorR&DOperationsCRDLearninghttps://www.chenshaowen.com/en/blog/let-us-start-learning-go-3.htmlTue, 23 Jul 2019 00:00:00 +0000Tue, 23 Jul 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/let-us-start-learning-go-3.html1. Go’s Package Management Mechanisms 1.1 GOPATH GOPATH pulls code with the go get command and places it in the GOPATH directory. The problems with GOPATH are: It cannot manage package versions It uses a global repository, so it cannot isolate projects effectively 1.2 Vendor Starting with version 1.5, Go微信公众号GoGoModulesLet's Learn GoLearningR&DPackage Managementhttps://www.chenshaowen.com/en/blog/let-us-start-learning-go-2.htmlWed, 05 Jun 2019 00:00:00 +0000Wed, 05 Jun 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/let-us-start-learning-go-2.html1. Go’s Data Structures Basic types Boolean: bool Integer: byte, int, int8, int16, uint, uintptr Floating point: float32, float64 Complex: complex64, complex128 String: string Character: rune Error: error Composite types Pointer: pointer Array: array Slice: slice Dictionary: map Channel: chan Struct: struct Interface: interface A Go variable identifier is made up of letters, digits, and underscores, and its first character cannot be a digit.微信公众号GoLet's Learn GoTypesData Structureshttps://www.chenshaowen.com/en/blog/configuration-of-developing-go.htmlWed, 23 Jan 2019 00:00:00 +0000Wed, 23 Jan 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/configuration-of-developing-go.html1. Common Environment Variables 1.1 GOROOT $GOROOT is the local directory where the Go package is installed. 1 2 3 4 cd /c/Go ls AUTHORS CONTRIBUTORS PATENTS VERSION bin favicon.ico misc robots.txt test CONTRIBUTING.md LICENSE README.md api doc lib pkg src 1.2 GOPATH $GOPATH is the Go workspace directory, used to hold code, third-party libraries, compiled intermediate files, and so on.微信公众号GoGetting StartedEnvironment VariablesDevelopment EnvironmentR&Dhttps://www.chenshaowen.com/en/blog/install-python3-and-go-kernel-in-jupyter.htmlSun, 09 Sep 2018 00:00:00 +0000Sun, 09 Sep 2018 00:00:00 +0000https://www.chenshaowen.com/en/blog/install-python3-and-go-kernel-in-jupyter.htmlEarlier we mentioned that Jupyter Notebook is an interactive notebook that supports running more than 40 programming languages and is very well suited to teaching. Recently, while learning the Go language, I thought of Jupyter. This article mainly describes how to install the Python3 and Go kernels inside Jupyter. 1.微信公众号JupyterGoPython3LearningR&D