This document discusses using Golang for building command line tools. It introduces the speaker, Takaaki Mizuno, and his experience. It then discusses some common use cases for Golang, including web services, mobile apps, daemons/services, and command line tools. It asks which language is commonly used for command line tools and argues that Golang is a good choice. Benefits of Golang for command line tools include producing a single binary, being cross-platform, having no runtime dependencies, and supporting concurrency. Many famous command line tools like Docker are written in Golang. The document demonstrates using the gcli tool to generate a skeleton for a Golang command line tool. It provides some tips for
The program uses a for loop to iterate from 1 to 100. Inside the loop, it uses if/else conditions to check if the number is divisible by 3, 5, or both and prints the corresponding string. If none of the conditions are met, it prints the number.
This document discusses Gett's location service, which maintains the geographical location of drivers. It describes the challenges of scaling, stability, and handling real-time data. The service has evolved from using Rails and Node.js to being rewritten in Golang using Redis for caching. The latest implementation uses Pat, Negroni and Redis. It generates code and uses MessagePack for serialization. Golang has helped Gett with scaling services like metrics and reporting and more services are moving to a dual Golang/other language stack.
Go is a statically-typed, garbage-collected programming language that is fast, supports concurrency, and has built-in support for remote package management. It is well-suited for building network servers and applications with non-blocking I/O. The document provides examples of writing a simple "Hello World" program, building a basic HTTP server, and using goroutines for concurrency. It also outlines how to install Go, set up a development environment, and find additional learning resources.
This document summarizes some key features and benefits of the Go programming language. It discusses Go's support for concurrency with lightweight goroutines and channels for communication between goroutines. It also covers Go's syntax which is similar to C but with memory safety due to garbage collection, and its standard library and tools. Finally it provides an example of Go's use at a large company for building high throughput low latency network services.
This document discusses using Golang for building command line tools. It introduces the speaker, Takaaki Mizuno, and his experience. It then discusses some common use cases for Golang, including web services, mobile apps, daemons/services, and command line tools. It asks which language is commonly used for command line tools and argues that Golang is a good choice. Benefits of Golang for command line tools include producing a single binary, being cross-platform, having no runtime dependencies, and supporting concurrency. Many famous command line tools like Docker are written in Golang. The document demonstrates using the gcli tool to generate a skeleton for a Golang command line tool. It provides some tips for
The program uses a for loop to iterate from 1 to 100. Inside the loop, it uses if/else conditions to check if the number is divisible by 3, 5, or both and prints the corresponding string. If none of the conditions are met, it prints the number.
This document discusses Gett's location service, which maintains the geographical location of drivers. It describes the challenges of scaling, stability, and handling real-time data. The service has evolved from using Rails and Node.js to being rewritten in Golang using Redis for caching. The latest implementation uses Pat, Negroni and Redis. It generates code and uses MessagePack for serialization. Golang has helped Gett with scaling services like metrics and reporting and more services are moving to a dual Golang/other language stack.
Go is a statically-typed, garbage-collected programming language that is fast, supports concurrency, and has built-in support for remote package management. It is well-suited for building network servers and applications with non-blocking I/O. The document provides examples of writing a simple "Hello World" program, building a basic HTTP server, and using goroutines for concurrency. It also outlines how to install Go, set up a development environment, and find additional learning resources.
This document summarizes some key features and benefits of the Go programming language. It discusses Go's support for concurrency with lightweight goroutines and channels for communication between goroutines. It also covers Go's syntax which is similar to C but with memory safety due to garbage collection, and its standard library and tools. Finally it provides an example of Go's use at a large company for building high throughput low latency network services.
The document provides an overview of the Go programming language and its key features. It covers:
- An agenda for a 4 day training course on Go covering topics like variables, pointers, collections, structs, interfaces, web development and databases.
- Descriptions of Go's origins at Google to solve problems of large codebases and distributed systems. It emphasizes goals of eliminating slowness and clumsiness.
- Explanations of Go's syntax which is C-like but with differences like keyword-introduced declarations and short variable declarations. It also covers types, functions, flow control structures, and pointers.
- Setup instructions for the Go development environment including installing the compiler and tools, setting the
JSONSchema with golang is about using JSONSchema to define configuration files' specification for your application and then the configuration files could be JSON/YAML.
With golang library called gojsonschema is pretty neat to handle validations.
Having trouble managing dependencies with golang ? Here's how to resolve those issues using some of the best tools built by the community for the community.
The internet of things in now , see how golang is a part of this evolutionYoni Davidson
This document discusses how Golang can help with Internet of Things (IoT) development. It summarizes that IoT development requires skills in many areas, from embedded programming to backend development, which makes it challenging. Golang can help unify development by allowing code to run natively on devices and be used for both device and backend code, simplifying context switching. It also discusses examples of using Golang with IoT, including a code sample accessing a webcam from a Raspberry Pi. Recommended Golang packages for IoT are also listed.
This document discusses concurrency and parallelism. It defines concurrency as dealing with multiple things at once through structuring solutions, while defining parallelism as doing multiple things at once through execution. It provides examples of concurrency concepts in Go including goroutines, channels, and the Go scheduler. It also gives best practices for concurrency in Go such as using wait groups, channels, contexts, and message queues.
CoreOS: The Inside and Outside of Linux ContainersRamit Surana
This document provides an overview of CoreOS, an operating system designed for containers. It discusses CoreOS components like etcd for key-value storage and fleet for cluster management. Etcd uses the Raft consensus algorithm to maintain data replication across nodes. CoreOS also includes container runtimes like Docker and rkt, and projects like Tectonic that combine CoreOS and Kubernetes for container management at scale. Security and vulnerability scanning tools like Clair and Fast Patch are also summarized.
Golang basics for Java developers - Part 1Robert Stern
This document provides an overview of Golang basics for Java developers. It covers Golang's history, features, syntax, data types, flow control, functions and interfaces, concurrency, and differences from Java. Key points include Golang being a compiled, statically typed language created at Google in 2007, its use of packages and imports, basic types like strings and integers, slices for dynamic arrays, maps for key-value pairs, functions with receivers, errors instead of exceptions, and goroutines for concurrency with channels.
(Live) build and run golang web server on android.aviSeongJae Park
Presented from gdg devfair 2014 and gdg korea golang seoul meetup 2015.
Added explanation about go 1.4 official android support a little from gdg korea golang seoul meetup presentation.
13 practical tips for writing secure golang applicationsKarthik Gaekwad
Writing secure applications in a new language is challenging. Here are some tips to help get you started for writing secure code in golang. Presented at Lascon 2015
Golang from Scala developer’s perspectiveSveta Bozhko
My talk from Functional Vilnius MeetUp #6.
http://www.functionalvilnius.lt/posts/2015-10-03-6th-meetup-announcement.html
Golang is becoming more and more popular. Most likely many of you have heard of its upgraded garbage collector and possibilities to work with lightweight threads – goroutines. Obviously, Golang is quite a good choice for server-side software oriented on a huge load. As Scala backend developer, I am a big fan of functional programming and actor model. Golang seems very promising, but from the first glance, its a totally imperative language. In my speech I’m going to tell about my experiments with Golang and attempt to use it as a functional language.
The document discusses microservices and the use of Golang for building microservices. Some key points:
- Microservices are small, independent services that work together, organized around business capabilities. Golang is well-suited for building microservices due to its static compilation, concurrency features, and standard library support for web development.
- The document discusses why the authors chose Golang for microservices, highlighting Golang's static compilation, lack of external dependencies, easy concurrency with goroutines, and standard library support for networking, JSON, protocols, and more.
- It provides examples of building simple microservices in Golang, including a hello world service and a basic HTTP server, and discusses how middleware
Functional programming avoids mutable state and side effects by treating computation as the evaluation of mathematical functions. In Golang, functional programming principles like immutable data, higher-order functions, and recursion can be applied to write more elegant, concise and testable code, though it lacks features like tail call optimization. Writing functional style enhances code quality by making behavior more predictable and explicit through referential transparency.
A brief description of a software architecture based on golang micro services.
The keynote was shown during the Golangit meetup @ Codemotion Rome 2015 event on March 27th 2015.
The document provides an overview of the Go programming language and its key features. It covers:
- An agenda for a 4 day training course on Go covering topics like variables, pointers, collections, structs, interfaces, web development and databases.
- Descriptions of Go's origins at Google to solve problems of large codebases and distributed systems. It emphasizes goals of eliminating slowness and clumsiness.
- Explanations of Go's syntax which is C-like but with differences like keyword-introduced declarations and short variable declarations. It also covers types, functions, flow control structures, and pointers.
- Setup instructions for the Go development environment including installing the compiler and tools, setting the
JSONSchema with golang is about using JSONSchema to define configuration files' specification for your application and then the configuration files could be JSON/YAML.
With golang library called gojsonschema is pretty neat to handle validations.
Having trouble managing dependencies with golang ? Here's how to resolve those issues using some of the best tools built by the community for the community.
The internet of things in now , see how golang is a part of this evolutionYoni Davidson
This document discusses how Golang can help with Internet of Things (IoT) development. It summarizes that IoT development requires skills in many areas, from embedded programming to backend development, which makes it challenging. Golang can help unify development by allowing code to run natively on devices and be used for both device and backend code, simplifying context switching. It also discusses examples of using Golang with IoT, including a code sample accessing a webcam from a Raspberry Pi. Recommended Golang packages for IoT are also listed.
This document discusses concurrency and parallelism. It defines concurrency as dealing with multiple things at once through structuring solutions, while defining parallelism as doing multiple things at once through execution. It provides examples of concurrency concepts in Go including goroutines, channels, and the Go scheduler. It also gives best practices for concurrency in Go such as using wait groups, channels, contexts, and message queues.
CoreOS: The Inside and Outside of Linux ContainersRamit Surana
This document provides an overview of CoreOS, an operating system designed for containers. It discusses CoreOS components like etcd for key-value storage and fleet for cluster management. Etcd uses the Raft consensus algorithm to maintain data replication across nodes. CoreOS also includes container runtimes like Docker and rkt, and projects like Tectonic that combine CoreOS and Kubernetes for container management at scale. Security and vulnerability scanning tools like Clair and Fast Patch are also summarized.
Golang basics for Java developers - Part 1Robert Stern
This document provides an overview of Golang basics for Java developers. It covers Golang's history, features, syntax, data types, flow control, functions and interfaces, concurrency, and differences from Java. Key points include Golang being a compiled, statically typed language created at Google in 2007, its use of packages and imports, basic types like strings and integers, slices for dynamic arrays, maps for key-value pairs, functions with receivers, errors instead of exceptions, and goroutines for concurrency with channels.
(Live) build and run golang web server on android.aviSeongJae Park
Presented from gdg devfair 2014 and gdg korea golang seoul meetup 2015.
Added explanation about go 1.4 official android support a little from gdg korea golang seoul meetup presentation.
13 practical tips for writing secure golang applicationsKarthik Gaekwad
Writing secure applications in a new language is challenging. Here are some tips to help get you started for writing secure code in golang. Presented at Lascon 2015
Golang from Scala developer’s perspectiveSveta Bozhko
My talk from Functional Vilnius MeetUp #6.
http://www.functionalvilnius.lt/posts/2015-10-03-6th-meetup-announcement.html
Golang is becoming more and more popular. Most likely many of you have heard of its upgraded garbage collector and possibilities to work with lightweight threads – goroutines. Obviously, Golang is quite a good choice for server-side software oriented on a huge load. As Scala backend developer, I am a big fan of functional programming and actor model. Golang seems very promising, but from the first glance, its a totally imperative language. In my speech I’m going to tell about my experiments with Golang and attempt to use it as a functional language.
The document discusses microservices and the use of Golang for building microservices. Some key points:
- Microservices are small, independent services that work together, organized around business capabilities. Golang is well-suited for building microservices due to its static compilation, concurrency features, and standard library support for web development.
- The document discusses why the authors chose Golang for microservices, highlighting Golang's static compilation, lack of external dependencies, easy concurrency with goroutines, and standard library support for networking, JSON, protocols, and more.
- It provides examples of building simple microservices in Golang, including a hello world service and a basic HTTP server, and discusses how middleware
Functional programming avoids mutable state and side effects by treating computation as the evaluation of mathematical functions. In Golang, functional programming principles like immutable data, higher-order functions, and recursion can be applied to write more elegant, concise and testable code, though it lacks features like tail call optimization. Writing functional style enhances code quality by making behavior more predictable and explicit through referential transparency.
A brief description of a software architecture based on golang micro services.
The keynote was shown during the Golangit meetup @ Codemotion Rome 2015 event on March 27th 2015.
私なりのArchitect’s Guide to Data Model Optimizationと知り得たことRyuji Iwata
2023年4月24日(月)に東京とオンラインにて開催された「TrailblazerDX 2023 Global Gathering for Architects」での私の発表資料「私なりのArchitect’s Guide to Data Model Optimizationと知り得たこと」です。セッション動画のデータモデル最適化ガイドに私の所感を交えた形でご紹介させて頂きます。
Dapr new building block: Distributed lockRyuji Iwata
2022年9月24日(土)に東京を中心に長野・福岡・オンラインで開催された「Japan Azure User Group 12周年イベント」での私の発表資料「Dapr new building block: Distributed lock」です。マイクロサービス構築API「Dapr」のバージョン1.8から導入された分散ロック機能を紹介させて頂きました。
2021年11月24日(水)に日本マイクロソフト社の従業員様向けにプログラミング言語Goを紹介させて頂いた際の発表資料「Microsoft/Azure x Goのご紹介」です。一人でも多くの方々にGoを知って頂きたく、Goとその使い処、Microsoft/Azureでの使われ処についてお話しさせて頂きました。
5. Top 5 Google+ “Go” Community
the order of the large number of gophers as of Nov. 30, 2014.
1. Go+
2. GDG Korea Golang
3. Golang
4. Go - golang
5. Golang JP
Search keyword is “golang” on Google+.
6. Golang JP - Community - Google+
https://plus.google.com/communities/107075098212007233819
7. Golang JP Google+ Community
・the Go community for Japanese gophers.
・since December 10, 2012. (2 years ago)
・The owner is Yoshifumi YAMAGUCHI.
・Moderators is Ian Lewis, Shinichi Ogawa,
Tetsuhiro Ueda, Yasuhiro MATSUMOTO
and me.
8. Members is increasing!
about 50 gophers per month. (since I became a moderator.)
May 28, 2014 300 gophers
July 30, 2014 400 gophers
October 3, 2014 500 gophers
November 30, 2014 ? gophers
9. 4 categories (1/2)
Discussion
ex. When you want to discuss other gophers.
When you have a questions about the Go.
Introduction
ex. When you find a good the Go articles on the internet.
When you write a blog about the Go.
10. 4 categories (2/2)
Tips and tricks
ex. When you run the Go code on the Go Playground,
you don’t need to click [Run] button.
Please push [shift] + [enter] keys.
Event report
ex. When you hold the Go event.
When you participated the Go event.
11. I hope ...
・If you don’t join Golang JP yet, please you think to join it.
・If you don’t post articles to Golang JP yet, please you try
to post it.
・If you don’t push +1 button to articles of Golang JP yet,
please you try to push it.
“One gopher, one article, one post and one push,
can change the Go world!” q@w@p (like a Malala Yousafzai)
15. Did you join these the Go events?
・The Go events held over 140 in Japan 2014.
・Mainly naming pattern is “event place”+”.go”.
・Following pages: It is a major the Go events.
17. Kanto region (1/3)
Go Conference - @tenntenn, @ymotongpoo, @jxck_
is the largest the Go event in Japan.
It is hold in spring and autumn.
タネマキ(tanemaki)GAE - @nuki_pon
is an event that targets Google App Engine / Go and Py.
Tokyo Golang Developers - @dallarosajp
is an event with a focus on foreigners.
18. Kanto region (2/3)
Go研(go ken) - @Jxck_
study quality and performance about the Go.
Go弱の会(go jyakunokai) - @mogetta
is an event for baby gophers.
大井町go(ohimachi go)
is an event for gophers.
19. Kanto region (3/3)
Gunosy.go - @y_matsuwitter
is an event that has been held in Gunosy Inc.
ヒカルのgo (hikarie.go) - @yosuke_furukawa
is an event that has been held in DeNA Co., Ltd.
dwanGo - @meso
is an event that has been held in DWANGO Co., Ltd.
21. Other region
Shizuoka.go - @secondarykey
was held first the Go event in Tokai region.
Golang Cafe - @ttyokoyama
is the most held a large number the Go event.
Fukuoka.go - @monochromegane
was held first the Go event in Kyushu region.