Marek Lipka questions

Marek Lipka answers

• Rails 4 - Do not scope if conditions
• Error :The action 'show' could not be found for PostsController"
• How do I upgrade the Ruby version of my project?
• Ruby idiomatic way to return a boolean
• Why rails is generating empty models?
• Complex number literal
• Using link_to with delete action in rails
• alias_method: stack level too deep
• Where to put custom callbacks that I use in several models
• How to iterate over an array in overlapping groups of n elements? [duplicate]