sgr-ksmt

struct ComposeTransformer<T, R> {
    let transformer: (Observable<T>) -> Observable<R>
    init(transformer: @escaping (Observable<T>) -> Observable<R>) {
        self.transformer = transformer
    }
    
    func call(_ observable: Observable<T>) -> Observable<R> {
        return transformer(observable)
    }
}

operando

package rx.playground;

import rx.Observable;
import rx.subjects.BehaviorSubject;
import rx.subjects.SerializedSubject;

public class Variable<T> {
    private T value;

    private final SerializedSubject<T, T> serializedSubject;

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

bradmontgomery

Setting up a SSL Cert from Comodo

I use Namecheap.com as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Purchase the cert

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

surjikal

Follow these steps to install graphite on OS X Lion.

Prerequisites

• Python 2.7
• Brew
• Git

Install dependencies

Install Cairo

caged

This is a general overview (from memory) of the steps I used to install graphite (http://graphite.wikidot.com) on OS X Lion. I think the steps are in order but YMMV. Please fork and fix if you find an error.

Install Python 2.7.2

brew install python

Check your env

$ python --version