Skip to content

Instantly share code, notes, and snippets.

View ScalaWilliam's full-sized avatar
🏠
Working from home

ScalaWilliam ScalaWilliam

🏠
Working from home
View GitHub Profile
@dergachev
dergachev / GIF-Screencast-OSX.md
Last active August 9, 2025 03:16
OS X Screencast to animated GIF

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Screencapture GIF

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

@ndarville
ndarville / business-models.md
Last active June 13, 2025 01:26
Business models based on the compiled list at http://news.ycombinator.com/item?id=4924647. I find the link very hard to browse, so I made a simple version in Markdown instead.

Business Models

Advertising

Models Examples
Display ads Yahoo!
Search ads Google
@chitan
chitan / WsChatServlet.java
Created July 7, 2012 01:44
How to use WebSocket of Tomcat
//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;
@hail2u
hail2u / twitter-bird.svg
Created June 6, 2012 20:39
SVG version of the new Twitter bird.
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
@jboner
jboner / latency.txt
Last active August 18, 2025 13:55
Latency Numbers Every Programmer Should Know
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
@robinsmidsrod
robinsmidsrod / _INSTALL.md
Last active July 14, 2025 23:28
Bootstrapping full iPXE native menu with customizable default option with timeout (also includes working Ubuntu 12.04 preseed install)

Add the following chunk to your existing ISC dhcpd.conf file.

if exists user-class and ( option user-class = "iPXE" ) {
    filename "http://boot.smidsrod.lan/boot.ipxe";
}
else {
    filename "undionly.kpxe";
}

(or see https://gist.github.com/4008017 for a more elaborate setup

@aprock
aprock / gist:2037883
Created March 14, 2012 17:00
manually serialize/deserialize android bundle
private String serializeBundle(final Bundle bundle) {
String base64 = null;
final Parcel parcel = Parcel.obtain();
try {
parcel.writeBundle(bundle);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
final GZIPOutputStream zos = new GZIPOutputStream(new BufferedOutputStream(bos));
zos.write(parcel.marshall());
zos.close();
base64 = Base64.encodeToString(bos.toByteArray(), 0);
@krasserm
krasserm / jaxb-01.scala
Created February 23, 2012 08:23
JAXB-based XML and JSON APIs
import javax.xml.bind.annotation._
@XmlRootElement(name = "person")
@XmlAccessorType(XmlAccessType.FIELD)
case class Person(fullname: String, username: Option[String], age: Int)
@conikeec
conikeec / EsperUtil.scala
Created February 12, 2012 08:06 — forked from wangzaixiang/EsperUtil.scala
Using Esper with Scala
package demo1
import com.espertech.esper.client.EventBean
import com.espertech.esper.client.EPAdministrator
import com.espertech.esper.client.UpdateListener
import com.espertech.esper.client.EPListenable
import com.espertech.esper.client.EPServiceProvider
object EsperUtil {
@wangzaixiang
wangzaixiang / EsperUtil.scala
Created December 12, 2011 03:55
Using Esper with Scala
package demo1
import com.espertech.esper.client.EventBean
import com.espertech.esper.client.EPAdministrator
import com.espertech.esper.client.UpdateListener
import com.espertech.esper.client.EPListenable
import com.espertech.esper.client.EPServiceProvider
object EsperUtil {