jdegoes

Applied Functional Programming with Scala - Notes

Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

wesbos

// paste in your console
    speechSynthesis.onvoiceschanged = function() {
      var msg = new SpeechSynthesisUtterance();
      msg.voice = this.getVoices().filter(v => v.name == 'Cellos')[0];
      msg.text = Object.keys(window).join(' ');
      this.speak(msg);
    };

efroese

Install Styler for Chrome https://chrome.google.com/webstore/detail/styler/bogdgcfoocbajfkjjolkmcdcnnellpkb?hl=en

Go to a review, click on the Styler "S" logo on the top right menu bar. Add the following CSS

span.k { color: #b05179 }
span.nc { color: #41618d }
span.kt { color: #41618d }

span.kc { color: #806DA2 ; font-weight: normal; }

podlech

brew install homebrew/dupes/apple-gcc42
rbenv install 1.9.3-p484
rbenv global 1.9.3-p484
git clone https://github.com/cowboyd/libv8.git
cd libv8
git checkout 3.11
export CC=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2
export CXX=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/g++-4.2
export CPP=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/cpp-4.2
bundle install

AviDuda

Unmuting Twitch VODs

As you know, Twitch has made a weird decision to mute VODs if it finds copyrighted content in videos.

Here's how to enjoy VODs without this annoying mute feature.

• Install Fiddler (tested on 4.4.9.2 on Windows).
• Enable HTTPS decryption. If you are using Firefox, you will need to do this.
• Rules -> Customize Rules...
• Paste the following code in the OnBeforeResponse method:

luxerama

class GrapeRequestLogSubscriber < ActiveSupport::LogSubscriber

  def grape_controller(event)
    request = Rack::Request.new(event.payload).env
    response = Rack::Response.new(event.payload)
    data      = extract_request(request)
    data.merge! extract_status(response)
    logger.send(:warning, data.to_json)
  end

afn

# Borrowed from https://github.com/y310/rspec-retry/blob/master/lib/rspec/retry.rb

CAPYBARA_TIMEOUT_RETRIES = 3

RSpec.configure do |config|
  config.around(:each, type: :feature) do |ex|
    example = RSpec.current_example
    CAPYBARA_TIMEOUT_RETRIES.times do |i|
      example.instance_variable_set('@exception', nil)
      self.instance_variable_set('@__memoized', nil) # clear let variables

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

v1nc3ntlaw

[mysqld]

init_connect='SET collation_connection = utf8mb4_unicode_ci'
init_connect='SET NAMES utf8mb4'
character-set-server  = utf8mb4
character-set-client  = utf8mb4
collation-server      = utf8mb4_unicode_ci
skip-character-set-client-handshake

innodb_file_format     = Barracuda

nathany

Ruby 2.0 backwards incompatible changes

From Peter Cooper's Walkthrough:

• lines, bytes, chars, codepoints returned an Enumerator in 1.9 -> use each_lines, each_bytes, each_chars, each_codepoints instead for an Enumerator
• # encoding: utf-8 is the default (which impacts regular expressions that expect it to be us-ascii, eg. vpim)
• respond_to? on a protected method returns false (was true)
• inspect doesn't use the redefined to_s
• Array#values_at returns nil for each number outside of the array
• CSV.dump & CSV.load are gone (object serialization)