chuyeow

// Show popup when user hovers over a child element of a container div.
$('div.child', '#container').mouseover(function() {
  $('#popup').show();
});

// But hide it only when the mouse pointer leaves the container. Mouseout doesn't
// work here because of event bubbling - it'll trigger on child elements of
// #container as well.
$('#container').bind('mouseleave', function() {
  $('#popup').hide();

chuyeow

# Micro-benchmark for new OrderedHash impl in http://github.com/rails/rails/commit/355f41d8aafd75d76db25cdda4736e0052b0605c
class OrderedHash < Hash
  def initialize(*args, &block)
    super
    @keys = []
  end

  def []=(key, value)
    if !has_key?(key)
      @keys << key

chuyeow

      user     system      total        real
json:parse  0.100000   0.010000   0.110000 (  0.106557)
json:parse!  0.110000   0.000000   0.110000 (  0.129599)

chuyeow

$ ./hpricot_vs_nokogiri.rb 
      user     system      total        real
hpricot:doc  0.230000   0.010000   0.240000 (  0.265904)
nokogiri:doc  0.030000   0.010000   0.040000 (  0.041641)
      user     system      total        real
hpricot:xpath  1.050000   0.020000   1.070000 (  1.114454)
nokogiri:xpath  0.210000   0.010000   0.220000 (  0.226418)
      user     system      total        real
hpricot:css  1.140000   0.030000   1.170000 (  1.339635)
nokogiri:css  0.700000   0.010000   0.710000 (  0.835559)