Bob Firestone bobfirestone

Presentation Topic Ideas For DTC Ruby Group

functional programming language
data is imutable
key philosophy is everything runs around data transformations not mutating and managing state
- pass returned value from function to function never changing the value of the original input
funcitons should take an input & always return the same value like a math formula
uses pattern matching for function calling
- used to assign variables in the function
- multiple function declerations and determines what version shold get called based on the params matching

Why am I learning to use vim?

I am tired of buying text editor licenses & having the new version never come out
Vim is installed on every *nix computer
Vim is free

*the repeater all commands can be prepended with a number of times to do the command

	defmodule TrumpSort do
	def sort([h\|tail]) do
	[ h \| sort(tail,h) ]
	end

	def sort([], _wall) do
	[]
	end

	def sort([h\|tail], wall) when h > wall do

	-module(two_15).
	-export([palindrome/1]).

	palindrome(String)->
	Fs = formattedString(String),
	Fs == lists:reverse(Fs).

	formattedString(String) ->
	% remove all spaces & non-word chars
	re:replace(string:to_lower(String), "\\s+\|\\W", "", [global,{return,list}]).

	-module (two_nine).
	-export ([double/1,evens/1,median/1,modes/1]).

	double([H]) -> [H * 2];
	double([H\|T]) ->
	[H * 2 \| double(T)].

	evens([H]) when 0 == H rem(2) -> [H];

	evens([H\|T]) ->

	-module(bits).
	-export([bits/1,tests/0]).

	bits(N) when N >= 0 ->
	% convert N into a base 2 list then back into a base 10 number
	bits(list_to_integer(integer_to_list(N,2)),0).

	bits(0, Acc) -> Acc;

	bits(N,Acc) ->

	-module(shapes).

	-export([area/1, enclose/1, perimeter/1, tests/0]).

	% The area, enclose , and perimeter functions each take a tuple
	% formatted {shape, {dimensions}}. The functions pattern match
	% against the shape atom and use the dimensions to do the calculations.

	% At the bottom of the file there is a test/0 function that
	% calls functions to test the math of the various calculations

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Pure React Example</title>
	</head>
	<body>
	<div id="react-container">
	<!-- This is the div react is binding to -->
	</div>