he and her he-and-her

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Foreword

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

1. Get You a Hug, Every Friday

FridayHug.com http://fridayhug.com

2. Run From a Single File

The Smallest Rails App http://thesmallestrailsapp.com

%w(action_controller/railtie coderay).each &method(:require)

This is just a jotting of notes on how to embed Faye into a single Rails process. Makes it nice to do simple real time things without the need for a separate Faye server/process.

Also uses Faye Redis to work across load balanced Rails apps.

You also need to copy the compiled javascript into vendor/assets/javascripts and include into application.js manifest.

Ignore the numbers in the file names... just used to add order to the Gist.

This uses the faye/faye Github repo at edc5b42f6560d31eae61caf00f6765a90e1818d1 since I wanted to use with the Puma rack server and that is only available in the master branch (until Faye 1.0)

Rails flash messages with AJAX requests

original: http://stackoverflow.com/a/10167659/656428

	// initialize the Shanghai component which keeps track of
	// shipping data in and out of the Port of Shanghai.
	var shanghai = Elm.worker(Elm.Shanghai, {
	coordinates:[0,0],
	incomingShip: { name:"", capacity:0 },
	outgoingShip: ""
	});

	function logger(x) { console.log(x) }

	# lib/capistrano/tasks/assets.rake

	Rake::Task['deploy:assets:precompile'].clear

	namespace :deploy do
	namespace :assets do
	desc 'Precompile assets locally and then rsync to remote servers'
	task :precompile do
	local_manifest_path = %x{ls public/assets/manifest*}.strip

	------------------------------------------------
	-- 2D Point Type
	type Point = {
	x : Float,
	y : Float
	}

	-- Convert Point to a tuple of floats
	toTuple : Point -> (Float, Float)
	toTuple point = (point.x, point.y)

	// List all fonts on iPhone
	NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];
	NSArray *fontNames;
	NSInteger indFamily, indFont;
	for (indFamily=0; indFamily < [familyNames count]; ++indFamily) {
	NSLog(@"Family name: %@", [familyNames objectAtIndex:indFamily]);
	fontNames = [[NSArray alloc] initWithArray:
	[UIFont fontNamesForFamilyName:
	[familyNames objectAtIndex:indFamily]]];
	for (indFont=0; indFont<[fontNames count]; ++indFont)

	<html>
	<head>
	<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
	<script type="text/javascript" src="https://www.google.com/jsapi"></script>
	<style>
	#piechart {
	top: 0;
	left: 0;
	width:100%;
	height:100%;