codahale

> GET /49XTeU HTTP/1.1
> User-Agent: curl/7.19.6 (i386-apple-darwin10.0.0) libcurl/7.19.6 OpenSSL/0.9.8k zlib/1.2.3
> Host: bit.ly
> Accept: */*
> 
< HTTP/1.1 301 Moved
< Server: nginx/0.7.42
< Date: Sat, 31 Oct 2009 18:54:25 GMT
< Content-Type: text/html; charset=utf-8
< Connection: keep-alive

codahale

var item = things.get(k)
if (item eq null) {
  val newItem = new Item()
  item = things.putIfAbsent(k, newItem)
  if (item eq null) {
    item = newItem
  }
}
return item

codahale

<build>
	<plugins>
		<plugin>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-shade-plugin</artifactId>
			<version>1.2.1</version>
			<configuration>
				<createDependencyReducedPom>true</createDependencyReducedPom>
			</configuration>
			<executions>

codahale

class Monitored extends SomeClass with JmxManaged {
  val currentThings = new AtomicLong
  val totalThings = new AtomicLong

  enableJMX() { jmx =>
    jmx.addAttribute("total-things") { totalThings.get }
    jmx.addAttribute("current-things") { currentThings.get }
  }

  // ...

codahale

scala> object Thing1 {  
     | var things = 0
     | }
defined module Thing1

scala> class Thing1 {
     | Thing1.things +=1 
     | }
defined class Thing1

codahale

// Scala 2.7.7, immutable map, uses foldLeft to loop over files/words
import java.io._
import scala.io._

def time(f: => Unit) = {
  val t1 = System.currentTimeMillis
  f
  ((System.currentTimeMillis - t1)/1000.0)
}
 

codahale

def time(f: => Unit) = {
  val t1 = System.currentTimeMillis
  f
  ((System.currentTimeMillis - t1)/1000.0)
}

def write(values: Array[(String, Int)], file: String) {
  val writer = new PrintWriter(new FileWriter(file))
  try {
    for ((x, y) <- values) {

codahale

# ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0], MBARI 0x6770, Ruby Enterprise Edition 2009.10
#                        user     system      total        real
# hash lookup:      21.470000   0.120000  21.590000 ( 23.683924)
# method dispatch:  26.980000   0.150000  27.130000 ( 29.014672)

# jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2010-01-12 6586) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_17) [x86_64-java]
#                        user     system      total        real
# hash lookup:       6.548000   0.000000   6.548000 (  6.548000)
# method dispatch:  10.841000   0.000000  10.841000 ( 10.841000)

codahale

  protected def ![A <: ColumnContainer](implicit consistency : ReadConsistency) : Seq[(String, Seq[A])] = {
    ks.pool.withConnection { conn =>
      val results = conn.client.get_range_slices(ks.name,
        cp,
        predicate,
        range,
        consistency.thrift)
        
      results.map { ks =>
        (ks.key, ks.columns.map{ container => new A(container)})

codahale

~/Downloads/node-v0.4.1> less pop-stack.js 
function doAThing(i) {
  console.log("Iter " + i);
  doAThing(i + 1);
}

doAThing(1); // this should be good

~/Downloads/node-v0.4.1> ./node pop-stack.js 
Iter 1