This was the 3rd Weblica conference in my Međimurje county (I wrote about the first one here and about the second one here).

Again, the entrance was free and every attendee got a nice T-Shirt (best design so far if you ask me), loads of stuff to eat and drink. The talks were interesting and informative, and for all this a big two thumbs up to the organizers. Also, active participants could get Microsoft keyboards, wireless mouses, USB drives, etc…

I got a mouse 🙂

Here I’ll just add few of the interesting slides from the presentations that I’ve attended. You can check the full program on Weblica’s website.

Conference oppening – Velimir Sanjković

ASP.NET Core i Angular 2 – Ratko Ćosić

[ngg_images source=”galleries” container_ids=”21″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

ASP.NET Core serving JavaScript applications – Dobriša Adamec

[ngg_images source=”galleries” container_ids=”23″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

Lunch

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Node.js + Docker – Davor Tarandek

[ngg_images source=”galleries” container_ids=”25″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

React – Toni Petrina

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No Bulls*it Freelancer – Tomislav Kozačinski

[ngg_images source=”galleries” container_ids=”27″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

Demystified Webpack – Andrei Zvonimir Crnković

[ngg_images source=”galleries” container_ids=”22″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

All in all, a great conference and hope to see you next year…

#Weblica 2017 notes @weblica https://t.co/2UooGO7k6R

— Nikola Brežnjak (@HitmanHR) May 29, 2017

TL;DR

In this post, I’ll show you some pictures and notes from the Ekobit DevArena 2016 conference.

Previous conferences

In case you’re interested here are the posts from the last two that I attended:

• DevArena 2014
• DevArena 2015

One does not simply skip breakfast…

Yeah, I eat too much, don’t invite me to your events unless you’ve got plenty to eat

¯\_(ツ)_/¯

This is how the accreditation looked on the back side, with the list of presentations per each track (4 in total):

I was super lazy this year regarding note taking, so I’ll pull a lazy on you and just show you the pictures that I took from each of the presentation that I attended.

They say that the picture is worth a thousand words. Well, in that case, this post is a lot of thousand words long 🙂

Keynote

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Tesla 🙂

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EU funds

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Angular 2

[ngg_images source=”galleries” container_ids=”11″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

Microservices

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Electron

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React

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React Native

[ngg_images source=”galleries” container_ids=”14″ override_thumbnail_settings=”0″ thumbnail_width=”120″ thumbnail_height=”90″ thumbnail_crop=”1″ images_per_page=”20″ number_of_columns=”0″ ajax_pagination=”0″ show_all_in_lightbox=”0″ use_imagebrowser_effect=”0″ show_slideshow_link=”1″ slideshow_link_text=”[Show as slideshow]” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″ display_type=”photocrati-nextgen_basic_thumbnails”]

Prize draw

They had a nice additional prize draw for those who asked questions (you get a small paper which you toss in a drawing bowl). I got 4 of them this year. However, no luck in winning something again 🙁

Ekobit #DevArena 2016 https://t.co/czNvnGJpGr

— Nikola Brežnjak (@HitmanHR) October 27, 2016

This was the 2nd Weblica conference in my Međimurje county (I wrote about the first one here).

Again, the entrance was free and every attendee got a T-Shirt, loads of stuff to eat and drink. The talks were interesting and informative, and for all this a big two thumbs up to the organizers. Also, active participants got a cool snake puzzle (here’s a link on how to solve it :)).

This year I had the honor to present about Ionic framework. You can watch the whole conference on this Youtube video (in case you’re wondering, my talk starts at 6:46):

I won’t go into the details of every presentation, you can take a look at them yourself :), I’ll just add pictures I took:

All in all, a great conference and hope to see you next year (I’ll be talking about Ionic 2 hopefully :D)…

@weblicahr another awesome conference! #weblica https://t.co/GhKFv3hG5T

— Nikola Brežnjak (@HitmanHR) May 15, 2016

Finally, I got my 5 minutes (well, OK, 45 to be exact) of fame 🙂

I was presenting Ionic Framework to  fellow developers on the 60th SQL/DEV UG meeting in Čakovec.

At this meeting there were actually two speeches:

• Introduction to hybrid mobile app development with Ionic Framework
• Electron

Introduction to hybrid mobile app development with Ionic Framework

• presenter: yours truly
• link to the presentation
• picture time:
  
• And (drums in the background) I’m very excited to announce that I’ll be speaking at the Weblica conference on 14.5.2016. Here, my name on the poster:
  

Electron

• presenter: Dejan Kovač
• picture time:
  
• Electron website
• Some cool apps have been built with it:
  
• Electron is awesome, to be honest! We just have to wait some time so that it matures fully.
• It’s the best time ever to be a web developer, as you now have access to every platform with the knowledge you already have

60th SQL/DEV User Group meeting #weblica https://t.co/6OVjLChKbk

— Nikola Brežnjak (@HitmanHR) April 23, 2016

hack.summit() is a virtual event for developers presented by Pluralsight which will take place “on the wire” on February 22nd-25th, 2016.

This years’ hack.summit() holds three titles:

• The largest virtual conference in history
• The largest programming conference in history
• The largest hackathon in history

and it has some really interesting speakers like programming language creators, open-source contributors, and thought leaders like:

• JON SKEET – #1 answerer on StackOverflow
• KENT BECK – Creator of Extreme Programming, creator of TDD
• DAVID HEINEMEIER HANSSON – Creator of Ruby on Rails
• JOEL SPOLSKY – Co-founder and CEO of StackOverflow, founder of Trello
• YEHUDA KATZ – Ember.js author, Rails Core contributor
• TOM CHI – Creator  of Google Glass
• BRIAN FOX – Inventor of GNU Bash Shell
• ORION HENRY – Founder of Heroku
• ROD VAGG – Node.js Technical Chair and Core Committer
• and many others…

On top of that, there will be a virtual hackathon on February 20th-21st. One can compete alone or in a team. The prize pool is also worth mentioning 150k$ times :).

This should definitely be interesting so make sure you check it out if you’re into these kind of things…

#hacksummit 2016 #virtual #conference and #hackathon https://t.co/YvMSZ621yh

— Nikola Brežnjak (@HitmanHR) December 28, 2015

I attended our local Microsoft community user group meeting which was about refactoring and transpilers. It’s full proper title (on Croatian) was 57. sastanak SQL/DEV UG Čakovec-Varaždin.

This was 57th meeting in a row, and the presenter Nikola Begedin had two awesome topics (with few notes I took):

Principi i konvencije u refaktoriranju koda (Principles and conventions in code refactoring)

There are typical problems in every code with typical fixes for each of these problems. So, it’s useful to know them in order to be able to detect them early in the code and fix them before they introduce technical debt.

Few of the principles:

• extract temp to query
• tell, don’t ask
• data clump
• decoupling

You should look to refactor

• God objects
• high churn code
• bugs – “bugs like company”. If a bug appeared at the same function, then refactor it because it’s obviously too cumbersome and the bug will inevitably manifest itself again

Few of the recommended books:

• Clean Code: A Handbook of Agile Software Craftsmanship
• Refactoring: Improving the Design of Existing Code
• Growing Object-Oriented Software, Guided by Tests

Korištenje transpilera (using transpilers)

Transpiler is a source to source compiler. What that means is that it’s basically a tool which translates from one language to another.

Transpilers allow us to write modern JavaScript code, to work with modules, use advanced language features (await, async, arrow functions, …), etc.

Some options that we have today are:

• Babel
• Google Traceur
• Browserify
• RequireJS

Visual studio 2015 supports Gulp task running via Task Runner Explorer.

The point is that we don’t need these but since sooner or later more and more browsers will support these functions and you can use them already today, I don’t see any reason why not to use all the benefits that they offer.

https://twitter.com/HitmanHR/status/679276361492598784

Post moved here: http://www.nikola-breznjak.com/blog/miscellaneou/ekobit-devarena-10-2015/

Here are my notes from an awesome 4th Infobip Dev Days 2015 conference:

[toc]

Introduction

• Presenter: Izabel Jelenić, Co-founder, CTO
• infobip – 600+ employees (122 devs)
• Worldwide A2P SMS traffic is expected to grow. Revenue > 45bn.
• They handle 150M transactions daily.
• They said they’re doing business with “one big social” network, but they didn’t name it actually, I wonder why is that (some kind of NDA or what? 🙂)
• Picture time:
  

How we ended up doing continuous delivery

• Presenter: Mario Žagar, Senior Software Architect
• ASAP and as often we have to go into production
• Unit & integration tests
• Scaling cube
• First they scaled by increasing monoliths
• Then they took some parts out of the monolith (API, Billing, Inbound SMS, …) => easier to focus, possible to deploy independently
• Typical feature deployment today:
  • Short lived feature branches with Git
  • Develop & run tests locally
  • Push feature branch to remote repository (Stash)
  • Jenkins – CI server builds the feature branch
  • Deployment artifacts published to Infobip repository (Artifactory)
  • Deploy feature branch to integration environment
  • Run tests on integration environment
  • Merge pull request to master branch & release
• Average about 80 deploys per day
• DevOps culture – you built it, you deploy it, you support it
• Troubleshooting tools:
  • Graylog
  • Graphite
  • Grafana
  • Nagios
  • Seyren
  • HipChat
  • Ansible
• Picture time:
  
• And a few more here, since, well, you know I love MEMEs:
  
  

Scrum experience

• Presenter: Marko Stipanov, Product Owner
• How to increase productivity?
  • hiring more devs?
  • best is to hire someone new and give them some totally new project
• PDD – Panic Driven Development
  • the bigger the panic the greater priority
  • how relates to this, please hands up 
• they tried with daily report writing
• Agile process manifesto
• they divided their 60 devs at a time to 12 teams and each team works on a small project
• Product Owner
  • vision and definition of products
  • goal setting
  • priority setting of the whole team
  • talks to stakeholders
• Scrum ceremonies
  • organisation
  • iterative process
• Scrum steps (they do the sprints fro 1-2 weeks instead of 2-4):
  • Product backlog
  • Sprint backlog
  • SPRINT
  • Deliverable
• 1 project = 1 team
• 1 team => more projects
• Priorities are defined by business value
• Kanban, Scrumban
• Daily team lead meeting with just few minutes
• You can’t do agile without teams!
• Scrum definitely give us a better intercommunication.
• Picture time:
  

Modern SQL

• Presenter: Markus Winand, SQL expert and author
  
• SQL 99 broke the relational standard
  • LATERAL
    • “for each” loop of SQL
  • WITH
    • “private methods” of SQL
  • WITH RECURSIVE
    • “while” loop of SQL
• SQL 2003
  • Turing complete
  • OVER and PARTITION BY

    SELECT dep, salary, SUM(salary) OVER (PARTITION BY dep) FROM ...

  • OVER and GROUP BY
    • actually, do this in the application, thank you very much
• SQL 2008
  • SELECT TOP is not official – it’s FETCH FIRST ROWS ONLY
• SQL 2011
  • OFFSET is EVIL
    • http://use-the-index-luke.com/ 
    • Also, the author was cool and he was giving these stickers:
      

Indexes: The neglected performance all-rounder

• Presenter: Markus Winand, SQL expert and author
• 50% SQL problems are caused by poor query/indexing
  
• CREATE INDEX is not in the standard!
• The solution- indexing is a development task!
•  And now the author hits the spots when he explains that in
  • 11 SQL books he analyzed only 1% of the pages are about indexes
  • 14 database administration books he analyzed only 6% of the pages are about indexes

• Everybody knows indexing is important for performance, yet nobody takes the time to learn and apply it properly.

Personal and Interpersonal Effectiveness

• Presenter: Danilo Goliani, PhD professor, enterpreneur
• Our clients are paying our paychecks!
• Personal effectiveness – others have faith in me
• Team effectiveness – I have faith in others
• Organisational effectiveness – clients love us
• Stephen R. Covey: 7 Habits of Highly Effective People
• Courage – willingness and ability to express your thoughts and emotions
• Don’t just say NO to your children – explain also WHY
• Self induced interrupt
• Brain Games
• Picture time:
  

Machine learning

• Presenter: Jan Šnajder, PhD/assistant professor/FER
• IBM Watcson Developer Cloud
• 88% of unstructured data
• #1 Top skill on LinkedIn 2014
• Tools:
  • Weka
  • RapidMiner
  • Orange
  • R (mother of all)
  • Matlab (commercial)
  • mloss.org
  • Apache Mahout
  • Spark
  • Azure Machine Learning
  • Amazon Machine Learning
• Picture time:
  

Java puzzlers

• Presenter: Aleksandar Dostić, Senior Software Engineer IB
• Picture time intro:
  
• Puzzle 1:
  
• Puzzle 2:
  
• Puzzle 3:
  
• Puzzle 4:
  
• Puzzle 5 – the most sneaky one!
  
  and here is why!!! 

HA-JDNI as a Solution for Service Discovery in Distributed Systems

• Presenter: Aleksandar Branjković, Head of Mobile Payments R&D
• Picture time:
  

I just came home from Weblica, the very first ever developers conference in my Međimurje county. All in all, a very good conference and I hope this is just the first one in the years to come! The entrance was free and every attendee got a T-Shirt. Since I was active with questions I got a nice tiblica with an USB instead of meat inside 🙂 as you can see on the featured image above. Below are my notes and some pictures, and a friend of mine uploaded few videos (including me using Oculus Rift) on youtube playlist.

ECMA Script 6 – the future is JavaScript

• Presenter Ratko Ćosić, MCSD, MCSE, MCITP, …
• JavaScript was the language of 2014
• ES6 (Harmony) features:
  • array functions (var sq = x => x*x)
  • block level scope (by using keyword let)
  • classes

    class Shape {
        id; x; y;
    
        constructor (id, x, y){
            this.id = id;
            this.name (x,y);
        }
    }

  • inheritance (extends keyword)
  • modules (kind of a merge between CommonJS and AMD, support for import, export)
  • promisses – similar to jQuery Deffered object
  • constants
  • new regular expression functions
  • new Math functions
  • symbols
  • typed arrays
  • default parameters
  • generators
  • map objects
  • collections (let s = new Set();)
  • better support for strings with for example backticks (`), includes(), startsWith(), endsWith() functions
• Transpilers => conversion of JS from one version to another (Traceur, 6to5, Babel, TypeScript?
• TypeScript – superset of JS, compiles to JS (ES5)
  • Angular2 uses TypeScript!
  • short types, interfaces, generics
• Open question: will SPA frameworks (Angular, Ember, Aurelia) be needed when we’ll have ES7???
• Browsers will be the new OS-es!
• picture time!:
  

node.js (sa sirom i vrhnjem)

• Presenter Davor Tarandek, Tria d.o.o.
• io.js uses the newer V8 engine than does node.js
• asynchronity is hard to grasp
• pm2 is awesome and it overpassed forever module
• I actually wrote three rather extensive posts on the topic of the MEAN stack, that’s why I have so little notes from this lecture
• picture time!:
  

Ember.js in practice

• Presenter Nikola Begedin, Coder.ly
• convention over configuration
• ember-cli is the thing
• allows ES6 syntax (Babel transpiler mentioned earlier)
• uses npm and bower
• ember is not ember-cli (is what the Ember team recommends)
• Some cool tools they use
  • Error reporting – Sentry
  • Task tracking – Asana
  • For chat – Slack
  • Heroku, Mandrill, Stripe, Amazon S3, Cloudfront, KissMetrics, Segment, NewRelic, CodeClimate, …
• Recommended books to start Ember – Ember CLI 101 (google for it, it’s suppose to be free ;), if not, don’t mind spending a buck or two)
• Talking Code podcast on iTunes
• picture time!:
  

Modern web using Microsoft tools

• Presenter Miroslav Popović
• Microsoft Studio vOld = .NET, 2003, 2005, 2008, 2010
• Change started with ASP.NET MVC
• 2012/2013 – Interface design, new web editor, GIT
• HTML support – full HTML5 IntelliSense, code snippets, data-* attributes
• JS – ECMA Script 5 support, strict mode support
• CSS – IntelliSense CSS3 validation, color selection, vendor prefixes, CSS drag/rop
• Browser Link
• Other stuff: CoffeeScript coloring, Mustache, Handlebars, Knockout bindings, Angular Directives, LESS and SASS preprocessors, TypeScript
• Community Edition FREE for up to 5 devs?!
• WebEssentials
  • open source extension for VS
• 2012/13 VS added Node.js based tools
  • static bundling & minification, image optimization & sprite generating, JS Hint, Source maps, LESS/SASS and CSS preview, CoffeScript preview
• Visual Studio 2015
  • new web structure
  • package managers – NuGet, npm, bower, jspm
  • client side build tools – MSBuild, Grunt, Gulp, TaskRunner Explorer
• Visual Studio Code – doesn’t (yet) support plugins like Sublime Text for example, but that’s a TODO
• Other cool tools: Resharper, SideWaffle, Github for VS, Chutzpah (Jasmine, Qunit, Mocha)
• picture time!:
  

Effective software team collaboration

• Presenter Zvonimir Juranko, Colombio
• Colombio app
• dare to disagree
• 85% of people fear the conflict with their boss
• The Marshmallow Challenge
• LEAN canvas
• be prepared to fail!
• genchi genbutsu – try it out yourself!
• make a MVP (minimum viable product) and build upon that
• picture time:
  

Oculus Rift – virtual reality for everyone

• Presenter Tibor Kozjak, Infenso d.o.o.
• there are some issues to be solved still
• price around 500$ with shipping to Croatia
• I tested the device after the talk and I guess in my case the verdict is “it’s really not for everyone, since I’m probably feeling sick and dizzy still :O”
• picture time!:
  

Hope to see you next year!

edit: A cool video made by the organisers after the conference:

Weblica 2015 from TICM on Vimeo.

Here are my notes (on Croatian) from the DevArena 2014 hosted by Ekobit. The bolded bullet points were, you guessed it, topics. All in all, a very well organised developers conference.

• Otvoreno o softerskom inženjerstvu i profesionalizmu
  • Leveli
    • level 0: continuous integration, unit testing
    • level 1: TDD, refactoring
    • level 2: coding standards
  • Testing stuff
    • https://github.com/Moq/moq4 – mocking library for .NET
    • Unit testing FTW!
    • http://sandcastle.codeplex.com/ – doxi iz unit testova; New => Help Project
    • Ne diraj ako nema testova, osim Right click => Extract to Method in VS
    • CodeRush & ReSharper
    • Code Contracts
• Application insights
  • za sad jos samo u preview modu i samo za web http://stackoverflow.com/questions/26099664/vs2013-application-insight-for-desktop-applications/26544013#26544013
  • ALM – application lifecycle management
  • omogucava provjeru dostupnosti, performansi, koristenja
  • cilj: smanjiti MTTD (mean time to detect) errora
  • servis se obavezno vrti na Azureu
  • Add New project => Web performance and load Test project
  • log4net nugget + insights appender
  • Visual studio online
  • Azure is the way to go!
• PRISM
  • instalacija preko NuGet-a
  • poznat još https://cinch.codeplex.com/, ali je kao jednostavniji, dok Prism (kompleksniji) im je jako se dobro uklopio u to dok su morali napraviti samo neki dio aplikacije da bude naplatni
  • napravljen po TDD i postoji source code
  • https://unity.codeplex.com/ i http://msdn.microsoft.com/en-us/library/dd460648(v=vs.110).aspx => bootstraping
  • prism inace ima sljedece patterne
    • addapter
    • app controller
    • command
    • composite and composite view
    • DI
    • IOC
    • Event aggregator
    • Facade
    • Observer
    • MVVM
    • Registry
    • Repository
• Razvoj web i mobilnih multimedijskih aplikacija na HTML 5 platformi
  • http://middle-earth.the-hobbit.com, https://github.com/mbostock/d3/wiki/gallery
  • web browser će postati OS
  • video, audio tag
  • Grafika na webu:
    • Canvas
      • samo elementarno, requestTimeFrame
      • problem skaliranja slike
    • SVG
      • skaliranje slika
      • svaki element moze imati neki filter, npr. blur
      • ima animacije (<set>, <animate>)
      • IE 10 ima probleme s animacijama
    • ChartJS, CanvasJS, EASEJS, Fabric, Paper, Processing, Kinetic, JustGauge, $.plot chart
    • WebGL
      • grana OpenGL-a
      • direktan pristup GPU – high performance, but compli freakin cated
      • https://github.com/begedin/DiceAndRoll – PHASER!
• Što je novo u XAML-u i XAML alatima za Visual Studio
  • NIŠTA
  • CPU usage tool with support for WPF (update 2 u VS2013)
  • .NET Managed Memory Analyzer
• IoC i DI
  • Inversion of Control
  • Dependency Injection
  • Unity IOC, Windsor, Structure Map, nInject
  • AOP – aspect oriented programming