Skip to content

Instantly share code, notes, and snippets.

View danielribeiro's full-sized avatar

Daniel Ribeiro danielribeiro

View GitHub Profile
@avibryant
avibryant / bayesab.js
Last active March 22, 2021 18:36
An implementation of http://www.evanmiller.org/bayesian-ab-testing.html with no depenedencies
function probabilityBBeatsA(aa, ba, ab, bb) {
var probability = 0.0;
for(var i = 0; i < ab; i++) {
var product = Math.log(1 + (aa + ba)/(i + bb));
var j = 1;
var start = i+1;
[bb, ba, aa, i].forEach(function(steps){
var stop = start + steps;
@nikolaykasyanov
nikolaykasyanov / maybe.swift
Last active February 3, 2018 23:27
Swift & Monads
// Make Optional a monad
extension Optional {
// Scala style, define `flatMap` directly
func flatMap<U>(f: (a: T) -> Optional<U>) -> Optional<U> {
switch (self) {
case .None: return nil
case .Some(let value): return f(a: value)
}
}
For each Ruby module/class, we have Ruby methods on the left and the equivalent
Clojure functions and/or relevant notes are on the right.
For clojure functions, symbols indicate existing method definitions, in the
clojure namespace if none is explicitly given. clojure.contrib.*/* functions can
be obtained from http://github.com/kevinoneill/clojure-contrib/tree/master,
ruby-to-clojure.*/* functions can be obtained from the source files in this
gist.
If no method symbol is given, we use the following notation:
@john2x
john2x / 00_destructuring.md
Last active June 13, 2025 13:00
Clojure Destructuring Tutorial and Cheat Sheet

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

(require '[clojure.core.async :as a])
(def xform (comp (map inc)
(filter even?)
(dedupe)
(flatmap range)
(partition-all 3)
(partition-by #(< (apply + %) 7))
(flatmap flatten)
(random-sample 1.0)
@kachayev
kachayev / concurrency-in-go.md
Last active May 4, 2025 05:48
Channels Are Not Enough or Why Pipelining Is Not That Easy
### Keybase proof
I hereby claim:
* I am worrydream on github.
* I am worrydream (https://keybase.io/worrydream) on keybase.
* I have a public key whose fingerprint is 8B48 52DE B697 6685 FAC6 0CFC 8E90 AD8D 7279 401E
To claim this, I am signing this object:
@cabeca
cabeca / simulator_populator
Created September 23, 2014 21:30
This script removes and recreates all simulators in Xcode 6.
#!/usr/bin/env ruby
device_types_output = `xcrun simctl list devicetypes`
device_types = device_types_output.scan /(.*) \((.*)\)/
runtimes_output = `xcrun simctl list runtimes`
runtimes = runtimes_output.scan /(.*) \(.*\) \((com.apple[^)]+)\)$/
devices_output = `xcrun simctl list devices`
devices = devices_output.scan /\s\s\s\s(.*) \(([^)]+)\) (.*)/

Screencapture and animated gifs

I say "animated gif" but in reality I think it's irresponsible to be serving "real" GIF files to people now. You should be serving gfy's, gifv's, webm, mp4s, whatever. They're a fraction of the filesize making it easier for you to deliver high fidelity, full color animation very quickly, especially on bad mobile connections. (But I suppose if you're just doing this for small audiences (like bug reporting), then LICEcap is a good solution).

Capturing (Easy)

  1. Launch quicktime player
  2. do Screen recording

screen shot 2014-10-22 at 11 16 23 am