Why Ruby is Great!
The single reason why I started dating Ruby class VCR def initialize @messages = [] end def method_missing(method, *args, &block) @messages << [method, args, block] […]
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Fancy Pancy Tech Talk
You can find a lot of business terms here https://en.wikipedia.org/wiki/List_of_business_terms https://en.wikipedia.org/wiki/List_of_buzzwords Churn Rate Churn rate, when applied to a customer base, refers to the proportion […]
Continue reading »Rails relations
problem You know when you want to select records depending on the values of related records (like belongs_to fields) ? scenario class TradingSignal < ActiveRecord::Base […]
Continue reading »Rails HATM (Has and belongs to many)
Nested forms with HABTM and HasManyThrough Start with the models has_many :events # creates …… accepts_nested_attributes_for :events, :allow_destroy => true # creates…. attr_accessible :events_attributes # […]
Continue reading »Running a script “later”
You know how it is, you need to download a 3GB install kit, but don’t want to disturb the missuz by clogging all the bandwidth. […]
Continue reading »Hitta exponentialfunktion från två punkter
Exempel 1 : Hitta den exponentialfunktion som går genom punkterna (1, 2) och (3, 5) Hitta basen a som kvoten mellan y2 och y1 a […]
Continue reading »Docker – dealing with images
I keep this blog item handy: Docker – Clean Up After Yourself! It talks about how to maintain and clean up the “leftovers” from running […]
Continue reading »Developing Rails apps using Docker
This article assumes that you have docker, docker-compose and docker-machine installed. For OSX use Docker Toolbox at docker.com/toolbox. For Linux install docker and docker-compose using […]
Continue reading »Swedish VPS providers
Huvudsakligen från https://sulo.se/2011/02/24/svenska-vps-leverantorer-en-prisjamforelse/ https://www.fsdata.se/server/vps http://www.glesys.se/vps.php https://www.oderland.se/tjanster/cloudvps/ http://www.patrikweb.net/content/section/24/51/ http://www.ipeer.se/linux-vps.php https://www.crystone.se/vps http://www.surftown.se/vps/priser http://www.space2u.com/vps.php http://www.itstaden.se/Serverdrift/Virtuell+Server.html Virtuell Privat Server http://www.internetverket.se/premium-vps Molntjänster http://www.adminor.net/vps http://www.securehosting.se/index.php/virtual-servers http://foretag.netit.se/?page_id=564 http://acon.se/tjanster/virtuell-server/ https://www.dalnix.se/tjanster/
Continue reading »Heroku
Heroku Rails Receipes Running a migration heroku run rake db:migrate Clearing a PG database on heroku heroku pg:reset DATABASE WARNING: Destructive action postgresql-flexible-10203 will lose […]
Continue reading »CSS and SASS in Rails
A good article about organising CSS/SASS in Rails http://www.mattboldt.com/organizing-css-and-sass-rails/ Basically you have this in yourapp/assets/stylesheets/application.css /* NOTE: Not Application.scss */ /* *= require_self *= require […]
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Redefining Rails Models: Going Beyond Rails and Sometimes, Beyond Tables
Harnessing ActiveRecord Outside Rails ActiveRecord, the model component of Rails, is well-known for its versatility. It can be used within Rails, of course, but did […]
Continue reading »CSS Tips
To center an image, use margin: auto; and make it into a block element: img { display: block; margin: auto; width: 40%; } Highlight alla länkar som inte länkar nånstans! a[href=”#”], a[href=””], a:not([href]) […]
Continue reading »Rails Templates
Just use them! Save a bunch of time when startiung a new project. Here’s my latest fav: Rails 5.1 with Bootstrap, Font Awesome and Devise. […]
Continue reading »Java Dates and Periods
Period and Duration are not just alternatives, they work very different. Duration is designed to work in exact measurements in seconds and nanoseconds. However, Period […]
Continue reading »Rails Console tips
Sometimes you want to test queries etc from the Rails Console that requiers you to be logged in (for example via Devise). This is how […]
Continue reading »Rails Resources
Gems you NEED 12 gems every rails developer should know 2016 7 must have gems to install on any project 8 useful ruby on rails […]
Continue reading »The problem with Rails Asset Pipeline that I always stumble upon
You know how it is, you develop using Rails and it is going great! Tailwind and downhill, you develop with an amazing speed. Then when […]
Continue reading »Rails and Devise – Login using either username or email
This is essentially a no-nonsense step-by-step description of the most common case from: https://github.com/plataformatec/devise/wiki/How-To:-Allow-users-to-sign-in-using-their-username-or-email-address 1) add a field to the User table rails generate migration […]
Continue reading »Javascript in 2017
The JS environment is, as we know, “complicated”. Every browser uses a different JavaScript engine: Chrome runs V8, Firefox runs SpiderMonkey, and Internet Explorer uses […]
Continue reading »Moving the MySQL data directory
Has this happened to you? You run for a while on the default installation of MySQL. The data increases and suddenly you realize that the […]
Continue reading »How to setup a Raspberry Pi as a NAS using Samba
http://www.simonthepiman.com/how_to_setup_windows_file_server.php
Continue reading »Capistrano!
How to deploy a Rails 4 app with Git and Capistrano
Continue reading »Calculating Historical Volatility
Historical Volatility shows how volatile an asset has been. There are numerous ways of calculating it, and I will show the most simple one here. […]
Continue reading »The Builder Pattern
Reasoning I won’t even go into why you should learn patterns. Patterns are canned knowledge! A problem the Builder Pattern solve It helps you avoid […]
Continue reading »Adding Stripe Payments to your Rails application
If you need to process payments, for example charging the user for using your great new website, Stripe is a great contender. An alternative is […]
Continue reading »Setting up 1000 Devise user accounts using fixtures
Seting up a one Devise user (version 3.5.1 and later) is simple in file <app>/test/fixtures/users.yml: tom: id: 11 name: TestUser email: test@example.org encrypted_password: <%= Devise::Encryptor.digest(User, ‘password’) […]
Continue reading »IOS App that scrolls both vertically and horizontally
Great example on how you create a “Netflix-lookalike” app with scrolling in bort vertical and horizontal direction. https://github.com/ThornTechPublic/HorizontalScrollingCollectionView
Continue reading »Test and Maximize network thruput
I had to transfer lots (LOTS) of video files from my IMAC where I had catptured a bunch of older DV tapes. Since space ran […]
Continue reading »A workflow to sort pictures and movies by date captured (EXIF data)
I have lots and lots of home made movies, mostly in the form of DV-tapes and SD-cards. (This workflow also works for photos and other […]
Continue reading »Hibernate and Java annotations
So….. I wanted to use something as neat and powerful as Rails’ ActiveRecord. I had used hibernate a bit a long time ago, and frankly […]
Continue reading »The Lazy Investor
I have started a new project. Since I do a fair share of investing, both in futures and stocks, I have tried several different ways […]
Continue reading »CheatSheet for creating an XCode IOS app with a UITableView
Setup Create a standard ViewController (NOT a TableViewController!) Drag a Table onto the ViewController. Snap to edges, Reset to “Suggested Constraints”. Option Cmd Shift = […]
Continue reading »Javascript-länkar att lägga till samlingen
Om ‘use strict’: http://ejohn.org/blog/ecmascript-5-strict-mode-json-and-more/ Modular Javascript/CommonJS: https://addyosmani.com/writing-modular-js/ Babel: Code for ES6 and still be backwards compatible with older browsers: https://babeljs.io JSX In depth: http://facebook.github.io/react/docs/jsx-in-depth.html
Continue reading »Facebook React Native
Det finns flera ramverk som ger möjlighet att skriva appar i Javascript, och sedan kompilera dem för den målmiljö man är intresserad av (oftast iOS […]
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