Balazs Varga vbalazs

The introduction to Reactive Programming you've been missing

So you're curious in learning this new thing called (Functional) Reactive Programming (FRP).

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

	4. Egy számlistában csúcsnak hívunk három szomszédos
	elemet, ha az elsõ és a harmadik kisebb a másodiknál.

	Írjon olyan Prolog eljárást csucsa néven, amely balról jobbra haladva
	felsorolja egy számlistában levõ csúcsokat! A három szomszédos elemet
	egy cs/3 funktorú struktúraként adja vissza! Segédeljárást nem
	definiálhat.

	% csucsa(+L, -Cs): Cs egy cs/3 funktorú struktúra, amely az L számlistában
	% levõ csúcsot ír le. L bemenõ, Cs kimenõ paraméter.

	begin
	require "bundler/inline"
	rescue LoadError => e
	$stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
	raise e
	end

	gemfile(true) do
	source "https://rubygems.org"
	# Activate the gem you are reporting the issue against.

	module Validators
	# Provides fast image validation on the temp S3 bucket based on the file's metadata
	# It checks for Content Type and file size
	class S3TempImage < Grape::Validations::Base
	MAX_FILE_SIZE = 10 * 1024 * 1024 # 10 MB

	attr_reader :attr_name, :file_name, :file_metadata

	def validate_param!(attr_name, params)
	@attr_name = attr_name