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sgr-ksmt / ObservableType+compose.swift
Last active Nov 14, 2019
compose operator for RxSwift
View ObservableType+compose.swift
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)
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 /
Last active May 15, 2021
The introduction to Reactive Programming you've been missing
bradmontgomery / install-comodo-ssl-cert-for-nginx.rst
Last active Apr 4, 2021
Steps to install a Comodo PositiveSSL certificate with Nginx.
View install-comodo-ssl-cert-for-nginx.rst

Setting up a SSL Cert from Comodo

I use 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.txt
Last active May 15, 2021
Latency Numbers Every Programmer Should Know
View latency.txt
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 /
Created May 17, 2012 — forked from caged/
Installing Graphite on OS X Lion

Follow these steps to install graphite on OS X Lion.


  • Python 2.7
  • Brew
  • Git

Install dependencies

Install Cairo

caged /
Created Mar 3, 2012
Installing Graphite on OS X Lion

This is a general overview (from memory) of the steps I used to install graphite ( 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