headius

#!/usr/bin/env ruby

require 'yaml'

y=[]
(1..10000).each{|x|
  #next unless x/2==(1.0*x)/2
  z=x
  divisors=[1]
  _continue=true

headius

# gem install benchmark_suite
require 'benchmark/ips'

class Foo1
  def foo
    "bar"
  end
  
  def foo_call
    foo

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class Foo
  def initialize
    @var = 0
    # pad the variables apart to try to force them onto different cache lines
    32.times do |i|
      eval "@pad#{i} = nil"
    end
    @updated = false
  end

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# Java impl of fib, statically typed but still using RubyFixnum objects

headius@headius-desktop:~/projects/jruby$ ~/hsx-hotspot/build/linux/jdk-linux-i586/bin/java -server -cp lib/jruby.jar:build/classes/test/ org.jruby.test.bench.BenchFixnumFibRecursive
Took 936ms for boxedFib(35) = 9227465
Took 847ms for boxedFib(35) = 9227465
Took 905ms for boxedFib(35) = 9227465
Took 943ms for boxedFib(35) = 9227465
Took 873ms for boxedFib(35) = 9227465

# Ruby impl of fib. The 20% different from Java is optimization opportunities in JRuby and invokedynamic, but we're very close to Java perf here.

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require 'pathname'
require 'digest'

`touch foo.txt`

path = Pathname.new 'foo.txt'
digest = Digest::MD5.new # digest type doesn't matter, see same problem with SHA1

# digest.file path  # this line throws an error when have JRUBY_OPTS=--1.9

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#!/usr/bin/env ruby

=begin

INSTALL:

  curl http://github.com/defunkt/gist/raw/master/gist.rb > gist &&
  chmod 755 gist &&
  sudo mv gist /usr/local/bin/gist

headius

Installing libxml2 with NestedVM

Prequisites

curl

darcs

Install NestedVM

First, install NestedVM:

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String.metaClass.methodMissing { String name, args ->
    String camel = ''
    name.split('_').eachWithIndex { part, i ->
        if (i == 0) camel += part
        else camel += (part[0].toUpperCase() + part[1..-1])
    }
    
    delegate."$camel"(args)
}

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#!/bin/bash
#
# Provides a function that allows you to choose a JDK.  Just set the environment 
# variable JDKS_ROOT to the directory containing multiple versions of the JDK
# and the function will prompt you to select one.  JAVA_HOME and PATH will be cleaned
# up and set appropriately.

# Usage:
# Include in .profile or .bashrc or source at login to get 'pickjdk' command.
# 'pickjdk' alone to bring up a menu of installed JDKs on OS X. Select one.

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class ChunkedArray
  def initialize(bucket_size = 500)
    @array, @bucket_size = [[]], bucket_size
  end
  
  def push(item)
    if !@array.last || @array.last.size == @bucket_size
      @array << []
    end
    @array.last << item