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@aemkei
aemkei / LICENSE.txt
Last active April 12, 2024 21:27 — forked from 140bytes/LICENSE.txt
Binary Tetris - 140byt.es
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
@p01
p01 / LICENSE.txt
Last active March 9, 2024 13:40 — forked from 140bytes/LICENSE.txt
Sudoku Solver in 140bytes
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2011 Mathieu 'p01' Henri - http://www.p01.org/releases/
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
@mikelehen
mikelehen / generate-pushid.js
Created February 11, 2015 17:34
JavaScript code for generating Firebase Push IDs
/**
* Fancy ID generator that creates 20-character string identifiers with the following properties:
*
* 1. They're based on timestamp so that they sort *after* any existing ids.
* 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs.
* 3. They sort *lexicographically* (so the timestamp is converted to characters that will sort properly).
* 4. They're monotonically increasing. Even if you generate more than one in the same timestamp, the
* latter ones will sort after the former ones. We do this by using the previous random bits
* but "incrementing" them by 1 (only in the case of a timestamp collision).
*/
@swannodette
swannodette / gist:3217582
Created July 31, 2012 14:52
sudoku_compact.clj
;; based on core.logic 0.8-alpha2 or core.logic master branch
(ns sudoku
(:refer-clojure :exclude [==])
(:use clojure.core.logic))
(defn get-square [rows x y]
(for [x (range x (+ x 3))
y (range y (+ y 3))]
(get-in rows [x y])))
@endolith
endolith / frequency_estimator.py
Last active October 30, 2023 18:08
Frequency estimation methods in Python
from __future__ import division
from numpy.fft import rfft
from numpy import argmax, mean, diff, log, nonzero
from scipy.signal import blackmanharris, correlate
from time import time
import sys
try:
import soundfile as sf
except ImportError:
from scikits.audiolab import flacread
@pheuter
pheuter / sc-dl.js
Created March 5, 2012 20:44
Bookmarklet that generates download link for a Soundcloud upload
(function(d) {
var dl = d.createElement('a');
dl.innerText = 'Download MP3';
dl.href = "http://media.soundcloud.com/stream/"+d.querySelector('#main-content-inner img[class=waveform]').src.match(/\.com\/(.+)\_/)[1];
dl.download = d.querySelector('em').innerText+".mp3";
d.querySelector('.primary').appendChild(dl);
dl.style.marginLeft = '10px';
dl.style.color = 'red';
dl.style.fontWeight = 700;
})(document);
@pathikrit
pathikrit / sudoku-1.coffee
Created October 10, 2012 07:04
1-liner CoffeeScript Sudoku Solver
solve = (s, c = 0) -> if c is 81 then s else if s[x = c/9|0][y = c%9] isnt 0 then solve s, c+1 else (([1..9].filter (g) -> ![0...9].some (i) -> g in [s[x][i], s[i][y], s[3*(x/3|0) + i/3|0][3*(y/3|0) + i%3]]).some (g) -> s[x][y] = g; solve s, c+1) or s[x][y] = 0
@preshing
preshing / sort1mb.cpp
Created October 25, 2012 11:28
Sort one million 8-digit numbers in 1MB RAM
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
typedef unsigned int u32;
typedef unsigned long long u64;
//-------------------------------------------------------------------------
// WorkArea
//-------------------------------------------------------------------------

(This is a brief summary of Ethereum's white paper)

Ethereum 101

What is Ethereum

Ethereum is a new cryptocurrency, like Bitcoin or Litecoin, that adds a number of new features. Most notably the inclusion of Agents (also known as Contracts); Independent Turing-complete programs that exist on the Ethereum blockchain. These Agents can receive Ether (Ethereum's currency) and other inputs, perform computations, hold balances, transfer Ether, and even activate other Agents.

Ethereum also attempts to fix some current issues with cryptocurenncy mining, such as rise of specialized hardware, large mining pools that aim to control the network, and the lack of reward for stale blocks, dissuading miners with weaker hardware.

Agents

@jrochkind
jrochkind / gist:2636355
Created May 8, 2012 15:31
reddit 'hot' algorithm, in ruby, with typo fixed
require 'date'
# Actually doesn't matter WHAT you choose as the epoch, it
# won't change the algorithm. Just don't change it after you
# have cached computed scores. Choose something before your first
# post to avoid annoying negative numbers. Choose something close
# to your first post to keep the numbers smaller. This is, I think,
# reddit's own epoch.
$our_epoch = Time.local(2005, 12, 8, 7, 46, 43).to_time