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

chitan

//This sample is how to use websocket of Tomcat.
package wsapp;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.ArrayList;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;

soffes

//
//  GPUImageTextureInput+CIImage.h
//  GPUImage
//
//  Created by Sam Soffes on 3/4/14.
//  Copyright (c) 2014 Sam Soffes. All rights reserved.
//

#import "GPUImageTextureInput.h"

hkhamm

Installing Cassandra on Mac OS X

Install Homebrew

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

verec

import CoreGraphics

import Foundation
import UIKit

class GradientLabel : UILabel {

    let gradient:               CGGradient!
    let alignedToSuperview:     Bool!

Tron5000

import Foundation

// Compressing and decompressing a UUID to 22 characters via base64.
// Works great as a Swift playground. These articles were helpful:
// http://blog.codinghorror.com/equipping-our-ascii-armor/
// http://69.195.124.60/~jasondoh/2013/08/14/creating-a-short-guid-in-objective-c/
let identifier = NSUUID().uuidString
let base64TailBuffer = "="

func compress(identifier: String) -> String? {

roxlu

#include "Encoding.h"

/* ------------------------------------------------------------------- */ 

static void output_callback(void* outputCallbackRefCon,
                            void* sourceFrameRefCon,
                            OSStatus status,
                            VTEncodeInfoFlags infoFlags,
                            CMSampleBufferRef sampleBuffer);
                            

natecook1000

// Open-ended range operators
// 
// 100... is equivalent to 100...Int.max
// ...-100 is equivalent to Int.min...-100
// ..<3 is equivalent to Int.min..<3

import Swift

/// Conforming types provide static `max` and `min` constants.
protocol MinMaxType {

kirsteins

var initalArray = [1, 2, 3]
let pointer: UnsafeMutablePointer<Int> = UnsafeMutablePointer(initalArray)
let arrary = Array(UnsafeBufferPointer(start: pointer, count: initalArray.count))

danielgalasko

extension UIView {
    func addConstaintsToPinHorizontalEdgesToSuperView(padding: CGFloat = 0) {
        prepareForConstraints()
        self.superview!.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-(padding)-[view]-(padding)-|",
            options: NSLayoutFormatOptions(0),
            metrics: ["padding":padding],
            views: ["view":self]))
    }
    
    func addConstaintsToPinVerticalEdgesToSuperView(padding: CGFloat = 0) {