Spring Boot
Almost 5 years ago (time flies!) Phil Webb and Dave Syer wrote a blog and twitter entry that boiled down to this: @Controller class ThisWillActuallyRun […]
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Common Rails error you will (most probably) see in your log file
Phil Nash wrote a great article about common Rails errors and how to deal with them. The common errors are: 1. ActionController::RoutingError 2. NoMethodError: undefined […]
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Adding a new website under Apache
Apache Apache is a great piece of website software. What I like the best, is that it is mature and reliable. It is also easy […]
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Good WordPress themes
Divi (https://www.elegantthemes.com) $89/år eller $249 lifetime fee OceanWP Enfold $59 (https://themeforest.net/item/enfold-responsive-multipurpose-theme/4519990)
Continue reading »Useful Linux commands
Note: All commands must be prefixed with “sudo” in case your user account doesn’t have enough privileges. System $ uname -a Displays Linux system information […]
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Java 11 is here!
In accordance with the new policy of releasing a new Java version every 6 months, we now have a fresh installation of Java 11 to […]
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Don’t like Java? Create your own language!
Nowadays, it’s easier than ever to create your own computer language. Whether it’s a simple rule-system, or a full-blown language, you can create the tokenizer […]
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Using microservices when building large-scale systems
Microservices, when supported by a robust framework, is a incredibly productive way of building large-scale services. You get a lot of support from the framework, […]
Continue reading »Installing Oracle Java 9 on OSX/macOS
For macOS/OSX all you need to do is download and run the DMG from http://www.oracle.com/technetwork/java/javase/downloads/jdk9-downloads-3848520.html
Continue reading »Saving GIT passwords
Saving your git password lets you skip giving username/password at every checkin Normally you use git config –global credential.helper store but this is not very […]
Continue reading »Setting up MYSQL, Apache2 and WordPress
MySQL/MariaDB Remember to change bind-address to 0.0.0.0. By default it is set to 127.0.0.1 and then you can’t connect remotely! Exactly which config file it […]
Continue reading »SSH Login without password
http://www.linuxproblem.org/art_9.html Basically you add the content of your own ~/.ssh/id_rsa.pub to the targets ~/.ssh/authorized_keys file. (Replace ‘a’ with your username, A with your hostname or […]
Continue reading »Setting up Oracle Java 9 on Ubuntu
Since Oracles own instructions (https://docs.oracle.com/javase/9/install/installation-jdk-and-jre-linux-platforms.htm) sucks big time, I can recommend this one instead: https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04 Simple and easy to follow. And it WORKS!
Continue reading »Javascript frameworks 2018
Some alternatives to Angular 1.x (deprecated), Angular 2 (Typescript) and Angular v4 https://www.slant.co/topics/4306/~angular-js-alternatives vue.js riot react (not a framework, per se. It’s a view rendering […]
Continue reading »What you need to know about AWK
General structure BEGIN { print “BEGIN” } /filter1/ { print $0 } /$6 == “Nov”/ { print $1, $2 } […]
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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] […]
Continue reading »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 »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 »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 »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 »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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