Barakat Barakat

Barakat / ConsistentHash.java

Created August 30, 2015 01:49

Simple Java consistent hashing implementation, do not use in production

	import java.util.Map;
	import java.util.TreeMap;
	import java.util.SortedMap;
	import java.security.MessageDigest;
	import java.security.NoSuchAlgorithmException;
	import java.math.BigInteger;
	import java.io.UnsupportedEncodingException;

	public class ConsistentHash {
	private static int MAX_REPLICA = 100;

Barakat / prime.py

Last active March 30, 2021 19:55

Prime-counting function and x/ln(x) plot

	#!python
	import numpy as np
	import matplotlib.pyplot as plt
	import matplotlib.patches as mpatches

	def pi(x):
	prime = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541]
	assert x <= prime[-1]
	i = 0
	while prime[i] < x:

Barakat / Main.java

Created July 20, 2015 01:13

Java Stream#flatMap minimal example.

	import java.util.Arrays;
	import java.util.Collection;
	import java.util.List;

	public class Main {
	public static void main(String[] args) {
	List<List<Integer>> nested = Arrays.asList(
	Arrays.asList(1, 2, 3),
	Arrays.asList(4, 5, 6),
	Arrays.asList(7, 8, 9)