Hugo Silva hugohernani

Software Engineer

hugohernani / smallest_arr_number.rb

Last active April 23, 2021 16:55

	class NumberFormatter
	def format(_number)
	raise NotImplementedError, "subclass should specify its formatting details"
	end
	end

	class NonPositiveFormatter < NumberFormatter
	def format(_number)
	"\n" # nothing to print
	end

hugohernani / anagrams.exs

Created February 18, 2021 03:56

Elixir code example on running agent and task to create a dictionary of anagrams (extracted from Thomas Dave book)

	defmodule Dictionary do
	@name __MODULE__

	## API
	def start_link,
	do: Agent.start_link(fn -> %{} end, name: @name)

	def add_words(words),
	do: Agent.update(@name, &do_add_words(&1, words))

hugohernani / ar_model_required_attrs.rb

Created March 11, 2016 17:47

Get Attributes which presence validator was added to a model_(instance|klass)

	def required_attributes(obj)
	target = obj.class == Class ? obj : obj.class
	target.validators.select do \|amv\|
	amv.class == ActiveRecord::Validations::PresenceValidator
	end.map(&:attributes).flatten
	end