lujanfernaud

Problem Solving for Developers

A selection of problem solving resources that can be helpful for developers.

Articles

• The 5 Problem-Solving Skills of Great Software Developers by Lorenzo Pasqualis

Videos

lujanfernaud

Back Pain: Stretches with Stuart McGill

The Cat Camel

Get on all fours and slowly move back and forth from a downward spinal curve with the head looking up like a cat and then move into a rounded spine while the head looks down like a camel. Each cycle should take about three to four seconds. 7-8 cycles are all that is needed.

Gist: Only do 7-8 cycles. More than that could be bad.

Video: https://www.youtube.com/watch?t=96&v=bcbuhePZZj0

lujanfernaud

Ruby and Nokogiri: Removing trailing spaces

sample_input = "<div>Hi&nbsp; &nbsp; &nbsp;</div>"
parsed_input = Nokogiri::HTML.parse(sample_input).text #=> "Hi   "

parsed_input.gsub(/\p{Space}*\z/, "") #=> "Hi"

\p{Space} catches any whitespace character.

lujanfernaud

# We need to use 'remote_<object>_url' as attribute instead of '<object>'.
# Having Image, we would use 'remote_image_url: <url>'.

titles = [Faker::RockBand.name, Faker::BossaNova.artist, Faker::Book.title]

54.times do |n|
  start_date = Faker::Date.between(1.day.from_now, 6.months.from_now)
  end_date   = start_date + 1.day
  
  Event.create!(title:            titles.sample + " ##{n}",

lujanfernaud

Rails: Dynamic Path Inside Partial

We have a _user partial that we want to render from two different resources, passing a collection. The only thing that needs to change in the partial is the path inside the link_to helper.

We can use self.send("path", object) inside link_to to achieve this.

groups/_user.html.erb

lujanfernaud

HTML: Spellcheck Feature

By adding the spellcheck="true" HTML attribute to any text field, browsers will automatically check for spelling errors.

<p contenteditable spellcheck="true">This exampull will be checkd fur spellung when you try to edit it.</p>

https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/spellcheck

lujanfernaud

Ruby: Immutable Value Object with Struct

Freezing the initializer after passing the args to super makes the object immutable.

# frozen_string_literal: true

# Freezing the initializer after passing the args to `super` makes the object immutable.
#
# Example:

lujanfernaud

Heroku: Reduce Slug Size With .slugignore

Adding a .slugignore file to the root folder of the project will make Heroku to remove the files and folders referenced after we push code to Heroku and the buildpack runs.

What is the Slug?

A compressed copy of the application comprising all files in the git repo along with packages installed during deployment.

Sources

lujanfernaud

Rails: Format Names

> " mary-joe o'donnell  ".downcase.gsub(/\b([a-z])/) { Regexp.last_match(1).capitalize }.strip
=> "Mary-Joe O'Donnell"

Source:

• https://stackoverflow.com/a/58105958/6212572

lujanfernaud

Rails: Permitting Arrays in Strong Parameters

We can do so by adding an array value to the param:

params.permit(:email, :name, sites: [])

We can even use nested arrays: