| package fpmax | |
| import scala.util.Try | |
| import scala.io.StdIn.readLine | |
| object App0 { | |
| def main: Unit = { | |
| println("What is your name?") | |
| val name = readLine() |
| yum install gcc make ncurses-devel giflib-devel libjpeg-devel libtiff-devel | |
| wget wget http://ftp.gnu.org/gnu/emacs/emacs-25.2.tar.xz | |
| tar xJf emacs-25.2.tar.xz | |
| cd emacs-25.2 | |
| ./configure --without-x --without-selinux | |
| make && sudo make install |
Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.
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
A primer/refresher on the category theory concepts that most commonly crop up in conversations about Scala or FP. (Because it's embarassing when I forget this stuff!)
I'll be assuming Scalaz imports in code samples, and some of the code may be pseudo-Scala.
A functor is something that supports map.