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CSS and SASS in Rails

Posted on January 1, 2018 by Peter Andersson

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 […]

Development, HTML and CSS, Ruby on Rails

Redefining Rails Models: Going Beyond Rails and Sometimes, Beyond Tables

Posted on January 1, 2018 by Peter Andersson

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 […]

Development, Ruby on Rails

CSS Tips

Posted on December 27, 2017 by Peter Andersson

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]) […]

Development, HTML and CSS

Rails Templates

Posted on December 27, 2017 by Peter Andersson

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. […]

Development, Ruby on Rails

Java Dates and Periods

Posted on December 6, 2017 by Peter Andersson

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 […]

Development, Java

Rails Console tips

Posted on November 16, 2017 by Peter Andersson

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 […]

Development, Ruby on Rails

Calculating Historical Volatility

Posted on April 27, 2017 by Peter Andersson

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. […]

Development, Trading

The Builder Pattern

Posted on April 23, 2017 by Peter Andersson

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 […]

Development, Java, Patterns

Adding Stripe Payments to your Rails application

Posted on March 30, 2017 by Peter Andersson

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 […]

Development, Ruby on Rails

Setting up 1000 Devise user accounts using fixtures

Posted on March 24, 2017 by Peter Andersson

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’) […]

Development, Ruby on Rails

IOS App that scrolls both vertically and horizontally

Posted on March 18, 2017 by Peter Andersson

Great example on how you create a “Netflix-lookalike” app with scrolling in bort vertical and horizontal direction. https://github.com/ThornTechPublic/HorizontalScrollingCollectionView

Development, IOS, XCode

Hibernate and Java annotations

Posted on March 1, 2017 by Peter Andersson

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 […]

Development, Java

CheatSheet for creating an XCode IOS app with a UITableView

Posted on May 13, 2016 by Peter Andersson

Setup Create a standard ViewController (NOT a TableViewController!) Drag a Table onto the ViewController. Snap to edges, Reset to “Suggested Constraints”. Option Cmd Shift = […]

Development, IOS, XCode

Javascript-länkar att lägga till samlingen

Posted on April 24, 2016 by Peter Andersson

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

Development, Javascript

Facebook React Native

Posted on April 13, 2016 by Peter Andersson

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 […]

Development, Javascript, React

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