egorpe

FXCM Webinar Series

on Algorithmic Trading

Python & Historical Tick Data

Dr. Yves J. Hilpisch | The Python Quants GmbH

Online, 24. October 2017

egorpe

$ ssh -A vm
$ git config --global url."git@github.com:".insteadOf "https://github.com/"
$ cat ~/.gitconfig
[url "git@github.com:"]
	insteadOf = https://github.com/
$ go get github.com/private/repo && echo Success!
Success!

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What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

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A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

Index:

egorpe

Using a rotary encoder as a volume control

On my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume. The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends.

Rotary encoder

A rotary encoder is like the standard potentiometer (i.e., analog volume knob) we all know, except (a) you can keep turning it in either direction for as long as you want, and thus (b) it talks to the RPi differently than a potentiometer would.

I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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Keybase proof

I hereby claim:

• I am egorpe on github.
• I am egorpe (https://keybase.io/egorpe) on keybase.
• I have a public key whose fingerprint is 8E2C 8732 5E5F 8E89 8088 6346 0915 26B3 3B8F A5B5

To claim this, I am signing this object:

egorpe

(require 'moz)

;;; Usage
;; Run M-x moz-reload-mode to switch moz-reload on/off in the
;; current buffer.
;; When active, every change in the buffer triggers Firefox
;; to reload its current page.

(define-minor-mode moz-reload-mode
  "Moz Reload Minor Mode"

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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.

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#!/usr/bin/python

import socket
import sys
from optparse import OptionParser

EXIT_OK = 0
EXIT_WARN = 1
EXIT_CRITICAL = 2