mrageh

FWIW: I didn't produce the content presented here (the outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

mrageh

RSpec.describe "Custom implementation of Array Flatten" do
  it 'flattens array containing empty array' do
    list = [[]]
    expect(custom_flatten(list)).to eq([])
  end

  it 'flattens array containing array with one element' do
    list = [[1]]
    expect(custom_flatten(list)).to eq([1])
  end

mrageh

// 1. Go to https://twitter.com/i/likes
// 2. Keep scrolling to the bottom repeatedly until all your favs are loaded.
// 3. Run this in your console (open in chrome by View > Developer > JavaScript Console)
// Notes: this may take a while if you have a lot of favs/likes
//       you can only access your most recent ~2000 likes.
//       inspired by https://gist.github.com/JamieMason/7580315
$('.ProfileTweet-actionButtonUndo').click()

mrageh

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

1. Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

mrageh

[File System] 2016/07/14 21:41:44 DEBUG - Copying dir '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-jobs553169157' to '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-job-list-archive177362242/nats'
[File System] 2016/07/14 21:41:44 DEBUG - Copying dir '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-jobs553169157/bin' to '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-job-list-archive177362242/nats/bin'
[File System] 2016/07/14 21:41:44 DEBUG - Copying file '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-jobs553169157/bin/nats_ctl' to '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-job-list-archive177362242/nats/bin/nats_ctl'
[File System] 2016/07/14 21:41:44 DEBUG - Copying dir '/Users/Adam/.bosh_init/installations/924920ae-200f-404a-7704-9ac3c6cf284e/tmp/rendered-jobs553

mrageh

# app/models/user.rb
class User < ActiveRecord::Base
  validates :zip_code, presence: true, zip_code: true
end

mrageh

MySQL

Getting started:

• http://www.sqlteaching.com/
• https://www.codecademy.com/courses/learn-sql

Related tutorials:

• MySQL-CLI: https://www.youtube.com/playlist?list=PLfdtiltiRHWEw4-kRrh1ZZy_3OcQxTn7P
• Analyzing Business Metrics: https://www.codecademy.com/learn/sql-analyzing-business-metrics

mrageh

/// Find all prime numbers less than `n`.
/// For example, `sieve(7)` should return `[2, 3, 5]`
pub fn sieve(n: usize) -> Vec<usize> {
    let mut p:usize = 2;
    let range =  p..n;
    let mut list:Vec<usize> = vec![];

    //build list
    for x in range {
        list.push(x);

mrageh

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  gem 'rails', path: '~/programming/projects/rails', branch: '4-2-stable'

mrageh

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer