braynm

## Example unit test for `AmountFormatter` module
defmodule GroceryBudget.AmountFormatterTest do
  use ExUnit.Case
  alias GroceryBudget.Utils.AmountFormatter

  describe "AmountFormatter" do
    @tag :amount_formatter
    test "to_db/1 should multiply by 100" do
      assert AmountFormatter.to_db(500) == 50000
    end

braynm

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

braynm

Big-O Time Complexities for Elixir data structures

Map [1]

Operation	Time Complexity
Access	O(log n)
Search	O(log n)
Insertion	O(n) for < 32 elements, O(log n) for >= 32 elements [2]
Deletion	O(n) for < 32 elements, O(log n) for >= 32 elements

braynm

List local branches

git for-each-ref --sort=-committerdate refs/heads/ --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'

braynm

" Plug
call plug#begin()
Plug 'ayu-theme/ayu-vim'
Plug 'morhetz/gruvbox'
Plug 'Pocco81/Catppuccino.nvim'

Plug 'junegunn/goyo.vim'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'
Plug 'junegunn/vim-journal'

braynm

Nearest Normal Aspect Ratio

This function returns the nearest aspect ratio of a width and height within a limited range of possible aspect ratios.

In other words, while 649x360 technically has an aspect ratio of 649:360, it’s often useful to know that the nearest normal aspect ratio is actually 9:5 (648x360).

nearestNormalAspectRatio(width, height, [side], [maxWidth], [maxHeight])

braynm

...
import Ecto.Query

date = ~D[2021-03-22]

# fetch by date
query = from a in Schema, where: fragment("?::date", a.createdAt) == ^date
Repo.all(query) # fetch

# fetch by range

braynm

Generate a new Elixir project using mix and add cowboy and plug as dependencies in mix.exs:

  defp deps do
    [
      {:cowboy, "~> 1.0.0"},
      {:plug, "~> 0.8.1"}
    ]
  end

braynm

https://lynk.sh/
https://treact.owaiskhan.me/
https://mertjf.github.io/tailblocks/
https://cantabriadigital.es/
https://roar.market/

braynm

Thanks to the original blog post: https://equimper.com/blog/how-to-setup-tailwindcss-in-phoenix-1.4

1. Install tailwindcss and postcss-loader from npm:

cd assets
npm i --save-dev tailwindcss postcss-loader postcss-import

2. Initialize tailwind (still in assets directory)