noxasaxon

Learning Rust

Getting Started + Installation | Cheat Sheet

Table of Contents

1. How Do I Start Learning Rust?!
2. Ok, I Think I Know The Basics But How Do I Get Better?!
3. Rustlang Tooling
4. Helpful References Throughout Your Journey
5. The Rust Community
6. Recommended (but not free) Books & Courses

PJUllrich

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

rponte

Pretende usar UUID como PK em vez de Int/BigInt no seu banco de dados? Pense novamente...

TL;TD

Não use UUID como PK nas tabelas do seu banco de dados.

Um pouco mais de detalhes

eduardodeoh

require 'dry-validation'

SCHEMA = Dry::Validation.Schema do
  configure do
    config.input_processor = :sanitizer

    def self.messages
      Dry::Validation::Messages.default.merge(en: { errors: { unique?: "oops not unique" }})
    end

solnic

require 'dry-validation'

SCHEMA = Dry::Validation.Schema do
  configure do
    config.input_processor = :sanitizer

    def self.messages
      Dry::Validation::Messages.default.merge(en: { errors: { unique?: "oops not unique" }})
    end

haggen

Get boot2docker working with nfs instead of vboxsf.

Tested on:

- Boot2Docker-cli version: v1.6.0
  Git commit: 9894ae9
- Boot2Docker-cli version: v1.6.2
  Git commit: cb2c3bc

maetl

require 'transproc/all'
require 'addressable/uri'

##
# Convert string keys to symbols
#
transform = Transproc(:symbolize_keys)

data = {
  'name' => 'Mark Rickerby',

rothgar

# Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source.
# Will include all hosts the playbook is run on.
# Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html

- name: "Build hosts file"
  lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present
  when: hostvars[item].ansible_default_ipv4.address is defined
  with_items: groups['all']

leandrocp

# rails3_bootstrap.rb
#
# rails new project --skip-test-unit -m rails3_bootstrap.rb

require 'rbconfig'
HOST_OS = RbConfig::CONFIG['host_os']

# Limpeza
#-------------------------------------------------------------------------------
say("Limpando arquivos", :yellow)