This document discusses how to create a domain-specific language (DSL) using Ruby. It begins with an introduction to DSLs and examples of external and internal DSLs. It then demonstrates how to build a DSL for configuring Meetup groups by parsing a configuration file using Ruby's instance_eval method. Key points are that instance_eval interprets a string as Ruby code in the context of an object, and using it with a block changes the default receiver inside the block. The document provides sample code for loading the configuration and implementing setter methods to configure the Meetup object.
Kernel Recipes 2019 - GNU poke, an extensible editor for structured binary dataAnne Nicolas
GNU poke is a new interactive editor for binary data. Not limited to editing basic ntities such as bits and bytes, it provides a full-fledged procedural, interactive programming language designed to describe data structures and to operate on them. Once a user has defined a structure for binary data (usually matching some file format) she can search, inspect, create, shuffle and modify abstract entities such as ELF relocations, MP3 tags, DWARF expressions, partition table entries, and so on, with primitives resembling simple editing of bits and bytes. The program comes with a library of already written descriptions (or “pickles” in poke parlance) for many binary formats.
GNU poke is useful in many domains. It is very well suited to aid in the development of programs that operate on binary files, such as assemblers and linkers. This was in fact the primary inspiration that brought me to write it: easily injecting flaws into ELF files in order to reproduce toolchain bugs. Also, due to its flexibility, poke is also very useful for reverse engineering, where the real structure of the data being edited is discovered by experiment, interactively. It is also good for the fast development of prototypes for programs like linkers, compressors or filters, and it provides a convenient foundation to write other utilities such as diff and patch tools for binary files.
This talk (unlike Gaul) is divided into four parts. First I will introduce the program and show what it does: from simple bits/bytes editing to user-defined structures. Then I will show some of the internals, and how poke is implemented. The third block will cover the way of using Poke to describe user data, which is to say the art of writing “pickles”. The presentation ends with a status of the project, a call for hackers, and a hint at future works.
Jose E. Marchesi
Kernel Recipes 2019 - GNU poke, an extensible editor for structured binary dataAnne Nicolas
GNU poke is a new interactive editor for binary data. Not limited to editing basic ntities such as bits and bytes, it provides a full-fledged procedural, interactive programming language designed to describe data structures and to operate on them. Once a user has defined a structure for binary data (usually matching some file format) she can search, inspect, create, shuffle and modify abstract entities such as ELF relocations, MP3 tags, DWARF expressions, partition table entries, and so on, with primitives resembling simple editing of bits and bytes. The program comes with a library of already written descriptions (or “pickles” in poke parlance) for many binary formats.
GNU poke is useful in many domains. It is very well suited to aid in the development of programs that operate on binary files, such as assemblers and linkers. This was in fact the primary inspiration that brought me to write it: easily injecting flaws into ELF files in order to reproduce toolchain bugs. Also, due to its flexibility, poke is also very useful for reverse engineering, where the real structure of the data being edited is discovered by experiment, interactively. It is also good for the fast development of prototypes for programs like linkers, compressors or filters, and it provides a convenient foundation to write other utilities such as diff and patch tools for binary files.
This talk (unlike Gaul) is divided into four parts. First I will introduce the program and show what it does: from simple bits/bytes editing to user-defined structures. Then I will show some of the internals, and how poke is implemented. The third block will cover the way of using Poke to describe user data, which is to say the art of writing “pickles”. The presentation ends with a status of the project, a call for hackers, and a hint at future works.
Jose E. Marchesi
Новый InterSystems: open-source, митапы, хакатоныTimur Safin
Presentation for the 1st InterSystems Meetup in the Minsk:
- New and better InterSystems changes their practice.
- open-source repositories, meetups, and hackathon;
- CPM (package manager) as a good example of open-source project
A Journey to Boot Linux on Raspberry PiJian-Hong Pan
Each processor/chip architecture has its own procedure to boot the kernel. It works with desgined partition layout and vendor specific firmwares/bootloaders in the boot partition. We can learn the related knowledge from the Raspbian image for Raspberry Pi, which is the board we can obtain easily. However, the diversity between the special booting procedures with specific firmwares/bootloaders increases the complexity for distribution maintainers. It will be great if there is a way to make it more generic that can be applied to most of the chip architectures/boards to boot up the system.
After referring to some Linux distributions, we learned U-Boot may play a role in the solution. It splits the booting procedure into hardware specific and generic system parts. This helps distribution maintainers deploy the generic system with OSTree, including device trees.
Let’s deep dive into this magic booting procedure!
David Duffett
UK
TeleSpeak
8th Conference - ElastixWorld 2011
Making asterisk feel like home outside north america
Haciendo sentir a Asterisk como en casa fuera de Norte América
A sprint thru Python's Natural Language ToolKit, presented at SFPython on 9/14/2011. Covers tokenization, part of speech tagging, chunking & NER, text classification, and training text classifiers with nltk-trainer.
Software Defined Networks (SDN) na przykładzie rozwiązania OpenContrail.Semihalf
Z prezentacji dowiesz się:
Co to są sieci programowalne i wirtualizowane (SDN / NFV)?
Jaką nową jakość wprowadzają one dla operatorów chmur obliczeniowych i centrów danych?
W jaki sposób technologia OpenContrail realizuje sieci nowej generacji?
Ruby is just over 20 years old. It's no longer young or hip, and that’s a good thing! In the last decade, Ruby has matured as a web technology. It's being used in many successful companies out there such as Hulu, GitHub, and Bloomberg. The ecosystem is comprised of many stable libraries and tools to handle most common web tasks, allowing you to focus on adding features to improve your product and better serve your customers. We'll talk about how you can build scalable and reliable software, but still maintain fast development turnaround by leveraging the maturity and creativity of the Ruby community.
A bit of history, frustration-driven development, and why and how we started looking into Puppet at Opera Software. What we're doing, successes, pain points and what we're going to do with Puppet and Config Management next.
Новый InterSystems: open-source, митапы, хакатоныTimur Safin
Presentation for the 1st InterSystems Meetup in the Minsk:
- New and better InterSystems changes their practice.
- open-source repositories, meetups, and hackathon;
- CPM (package manager) as a good example of open-source project
A Journey to Boot Linux on Raspberry PiJian-Hong Pan
Each processor/chip architecture has its own procedure to boot the kernel. It works with desgined partition layout and vendor specific firmwares/bootloaders in the boot partition. We can learn the related knowledge from the Raspbian image for Raspberry Pi, which is the board we can obtain easily. However, the diversity between the special booting procedures with specific firmwares/bootloaders increases the complexity for distribution maintainers. It will be great if there is a way to make it more generic that can be applied to most of the chip architectures/boards to boot up the system.
After referring to some Linux distributions, we learned U-Boot may play a role in the solution. It splits the booting procedure into hardware specific and generic system parts. This helps distribution maintainers deploy the generic system with OSTree, including device trees.
Let’s deep dive into this magic booting procedure!
David Duffett
UK
TeleSpeak
8th Conference - ElastixWorld 2011
Making asterisk feel like home outside north america
Haciendo sentir a Asterisk como en casa fuera de Norte América
A sprint thru Python's Natural Language ToolKit, presented at SFPython on 9/14/2011. Covers tokenization, part of speech tagging, chunking & NER, text classification, and training text classifiers with nltk-trainer.
Software Defined Networks (SDN) na przykładzie rozwiązania OpenContrail.Semihalf
Z prezentacji dowiesz się:
Co to są sieci programowalne i wirtualizowane (SDN / NFV)?
Jaką nową jakość wprowadzają one dla operatorów chmur obliczeniowych i centrów danych?
W jaki sposób technologia OpenContrail realizuje sieci nowej generacji?
Ruby is just over 20 years old. It's no longer young or hip, and that’s a good thing! In the last decade, Ruby has matured as a web technology. It's being used in many successful companies out there such as Hulu, GitHub, and Bloomberg. The ecosystem is comprised of many stable libraries and tools to handle most common web tasks, allowing you to focus on adding features to improve your product and better serve your customers. We'll talk about how you can build scalable and reliable software, but still maintain fast development turnaround by leveraging the maturity and creativity of the Ruby community.
A bit of history, frustration-driven development, and why and how we started looking into Puppet at Opera Software. What we're doing, successes, pain points and what we're going to do with Puppet and Config Management next.
Les slides du Tools in Action que j'ai donné à Devoxx France 2019.
Le JDK est open source et son développement aussi. L'ensemble des nouveautés vit sur des branches Mercurial qui peuvent être téléchargées et compilées à la demande. Cela permet de jouer avec des fonctionnalités encore en chantier, de regarder comment les nouvelles syntaxes fonctionneront, bref, de jouer avec un JDK du futur, qui n'existera peut-être jamais. L'objet de ce tools in action est simple : montrer comment tout ceci fonctionne, de l'installation d'une machine Ubuntu à l'exécution d'un JDK recompilé maison.
Collaborative Cuisine's 1 Hour JNDI CookbookKen Lin
For programmers who are already familiar with JNDI and LDAP basics, but wonder how to mix all those ingredients together into collaborative directory-enabled JEE solutions.
http://kenlin.com
DSL Construction with Ruby - ThoughtWorks Masterclass Series 2009Harshal Hayatnagarkar
Ruby language is an attractive choice for constructing internal domain-specific languages. Living true to the quote of Bjarne Stroustrup "Library Design is Language Design, and Library Design is Language Design", a good design in Ruby can be warped into a good DSL without much efforts.
Reproducible Computational Research in RSamuel Bosch
A short presentation with pointers on getting started with reproducible computational research in R. Some of the topics include git, R package development, document generation with R markdown, saving plots, saving tables and using packrat.
Introduction to automation in the cloud, why it's needed, what are the tools or ways of working, the processes, the best practises with some examples and takeaways.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
zkStudyClub - Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex ProofsAlex Pruden
This paper presents Reef, a system for generating publicly verifiable succinct non-interactive zero-knowledge proofs that a committed document matches or does not match a regular expression. We describe applications such as proving the strength of passwords, the provenance of email despite redactions, the validity of oblivious DNS queries, and the existence of mutations in DNA. Reef supports the Perl Compatible Regular Expression syntax, including wildcards, alternation, ranges, capture groups, Kleene star, negations, and lookarounds. Reef introduces a new type of automata, Skipping Alternating Finite Automata (SAFA), that skips irrelevant parts of a document when producing proofs without undermining soundness, and instantiates SAFA with a lookup argument. Our experimental evaluation confirms that Reef can generate proofs for documents with 32M characters; the proofs are small and cheap to verify (under a second).
Paper: https://eprint.iacr.org/2023/1886
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
The Metaverse and AI: how can decision-makers harness the Metaverse for their...Jen Stirrup
The Metaverse is popularized in science fiction, and now it is becoming closer to being a part of our daily lives through the use of social media and shopping companies. How can businesses survive in a world where Artificial Intelligence is becoming the present as well as the future of technology, and how does the Metaverse fit into business strategy when futurist ideas are developing into reality at accelerated rates? How do we do this when our data isn't up to scratch? How can we move towards success with our data so we are set up for the Metaverse when it arrives?
How can you help your company evolve, adapt, and succeed using Artificial Intelligence and the Metaverse to stay ahead of the competition? What are the potential issues, complications, and benefits that these technologies could bring to us and our organizations? In this session, Jen Stirrup will explain how to start thinking about these technologies as an organisation.
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
2. DSL Powered by Rabbit 2.1.2
Who am I ?
Yukio Goto
favorite
Ruby, emacs, zsh, tennis✓
✓
work
Rakuten Asia Pte. Ltd.✓
As senior application engineer✓
✓
✓
24. DSL Powered by Rabbit 2.1.2
Benefit of making DSL
DSL makes your Application
easy to write✓
easy to read✓
easy to use✓
✓
25. DSL Powered by Rabbit 2.1.2
theme
Configuration file using DSL
26. DSL Powered by Rabbit 2.1.2
config version 1
# singapore-ruby-group.conf
meetup do |conf|
conf.group = 'Singapore-Ruby-Group'
conf.organizer = 'Winston Teo'
conf.sponsors = ['Engine Yard',
'Silicon Straits',
'Plug-In@Blk71']
end
27. DSL Powered by Rabbit 2.1.2
how to use
mt = Meetup.load('singapore-ruby-group.conf')
puts mt.group
# => Singapore-Ruby-Group
puts mt.organizer
# => Winston Teo
puts mt.sponsors.join(', ')
# => Engine Yard, Silicon Straits, Plug-In@Blk71
28. DSL Powered by Rabbit 2.1.2
implementation
# Sample class to load configuration
class Meetup
attr_accessor :group, :organizer, :sponsors
def self.load(path)
fail "config file not found: #{path}" unless File.exist?(path)
mt = Meetup.new
File.open(path, 'r') do |file|
mt.instance_eval(File.read(path), path)
end
mt
end
private
def meetup
yield self
end
end
29. DSL Powered by Rabbit 2.1.2
key point
def self.load
# ...
File.open(path, 'r') do |file|
mt.instance_eval(File.read(path), path)
end
# ...
end
def meetup
yield self
end
30. DSL Powered by Rabbit 2.1.2
first point
pass string to 'instance_eval'
def self.load
# ...
File.open(path, 'r') do |file|
mt.instance_eval(File.read(path), path)
end
# ...
end
31. DSL Powered by Rabbit 2.1.2
instance_eval
"instance_eval"
32. DSL Powered by Rabbit 2.1.2
instance_eval
interpretes
String
51. DSL Powered by Rabbit 2.1.2
load
class Meetup
attr_accessor :group, :organizer, :sponsors
def self.load(path)
mt = new
File.open(path, 'r') do |file|
loader = MeetupLoader.new(mt)
loader.instance_eval(file.read, path)
end
mt
end
end
52. DSL Powered by Rabbit 2.1.2
make support class
make support class
MeetupLoader
53. DSL Powered by Rabbit 2.1.2
make support class
define setter
method
54. DSL Powered by Rabbit 2.1.2
make support class
not use '='
56. DSL Powered by Rabbit 2.1.2
make support class
load function
(meetup) only
57. DSL Powered by Rabbit 2.1.2
make support class (setter)
class MeetupLoader
def initialize(mt)
@meetup = mt
end
# ...
def group(g)
@meetup.group = g
end
def organizer(o)
@meetup.organizer = o
end
# ...
end
58. DSL Powered by Rabbit 2.1.2
instance_eval again
class MeetupLoader
# ...
def meetup(&block)
instance_eval(&block)
end
# ...
end
59. DSL Powered by Rabbit 2.1.2
The point of black magic
instance_eval
again
60. DSL Powered by Rabbit 2.1.2
instance_eval for block
instance_eval
with block
64. DSL Powered by Rabbit 2.1.2
original code
class Meetup
attr_accessor :group, :organizer, :sponsors
def self.load(path)
mt = new
File.open(path, 'r') do |file|
loader = MeetupLoader.new(mt)
loader.instance_eval(file.read, path)
end
mt
end
end
65. DSL Powered by Rabbit 2.1.2
expand instance_eval virtually 1
def self.load(path)
mt = new
File.open(path, 'r') do |file|
loader = MeetupLoader.new(mt)
# loader.instance_eval(file.read, path)
loader.meetup {
group 'Singapore-Ruby-Group'
organizer 'Winston Teo'
# ...
}
end
#...
66. DSL Powered by Rabbit 2.1.2
instance_eval with block
class MeetupLoader
# ...
def meetup(&block)
instance_eval(&block)
end
# ...
end
81. DSL Powered by Rabbit 2.1.2
take a way
You can make DSL✓
instance_eval is interesting✓
82. DSL Powered by Rabbit 2.1.2
Hiring
Rakuten Asia Pte. Ltd.
wants to hire
Server side Application
Engineer (Ruby, java)
✓
iOS, Android Application
Engineer
✓
✓
83. DSL Powered by Rabbit 2.1.2
Any question ?
Any question ?
84. DSL Powered by Rabbit 2.1.2
Thank you
Thank you
for listening