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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
@peanav
peanav / .tmux.conf
Created December 15, 2015 17:25
My tmux.conf
# Make ESC work right
set -sg escape-time 0
# Make the colors work right
set -g default-terminal "screen-256color"
# set window and pane index to 1 (0 by default)
set-option -g base-index 1
setw -g pane-base-index 1
@PurpleBooth
PurpleBooth / README-Template.md
Last active October 17, 2025 19:12
A template to make good README.md

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

anonymous
anonymous / tmux.conf
Created September 9, 2014 18:35
vim friendly tmux configuration
#Prefix is Ctrl-a
set -g prefix C-a
bind C-a send-prefix
unbind C-b
set -sg escape-time 1
set -g base-index 1
setw -g pane-base-index 1
#Mouse works as expected
@adamwiggins
adamwiggins / adams-heroku-values.md
Last active September 6, 2025 20:29
My Heroku values

Make it real

Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.

Ship it

Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.

Do it with style