badboy

Original link: http://www.concentric.net/~Ttwang/tech/inthash.htm
Taken from: http://web.archive.org/web/20071223173210/http://www.concentric.net/~Ttwang/tech/inthash.htm
Reformatted using pandoc

Integer Hash Function

Thomas Wang, Jan 1997

last update Mar 2007

henrik

1. Your class can be no longer than 100 lines of code.
2. Your methods can be no longer than five lines of code.
3. You can pass no more than four parameters and you can’t just make it one big hash.
4. When a call comes into your Rails controller, you can only instantiate one object to do whatever it is that needs to be done. And your view can only know about one instance variable.

You can break these rules if you can talk your pair into agreeing with you.

seanparsons

case class ListFoldRightBenchmark() extends SimpleScalaBenchmark {
  import scala.collection.mutable.ArrayStack

  @Param(Array("0", "1", "2", "3", "5", "10", "100", "500", "1000", "2000"))
  val length: Int = 0

  var list: List[Int] = _

  override def setUp() {
    // set up all your benchmark data here

Coneko

#import <pthread.h>
#import <mach/thread_act.h>

// These two functions are declared in mach/thread_policy.h, but are commented out.
// They are documented here: https://developer.apple.com/library/mac/#releasenotes/Performance/RN-AffinityAPI/_index.html
kern_return_t	thread_policy_set(
					thread_t			thread,
					thread_policy_flavor_t		flavor,
					thread_policy_t			policy_info,
					mach_msg_type_number_t		count);

jboner

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

axefrog

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace SuffixTreeAlgorithm
{
	public class SuffixTree
	{

rygorous

// float->half variants.
// by Fabian "ryg" Giesen.
//
// I hereby place this code in the public domain, as per the terms of the
// CC0 license:
//
//   https://creativecommons.org/publicdomain/zero/1.0/
//
// float_to_half_full: This is basically the ISPC stdlib code, except
// I preserve the sign of NaNs (any good reason not to?)

darkfall

class PngIconConverter
    {
        /* input image with width = height is suggested to get the best result */
        /* png support in icon was introduced in Windows Vista */
        public static bool Convert(System.IO.Stream input_stream, System.IO.Stream output_stream, int size, bool keep_aspect_ratio = false)
        {
            System.Drawing.Bitmap input_bit = (System.Drawing.Bitmap)System.Drawing.Bitmap.FromStream(input_stream);
            if (input_bit != null)
            {
                int width, height;

chitchcock

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

SamSaffron

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Reflection.Emit;
using System.Collections.Concurrent;
using System.Data;
using System.Reflection;