platform.js -- Memoize functions base on browser type.

jquery.anim8.js

// Simple example of using platform in a jQuery plugin:

// $('#block').anim8({ top:50, left:350 }, 250);

// For Webkit browsers it will use CSS animations, $.fn.animate for other browsers
$.fn.anim8 = (function($){
  return platform({
    webkit: function(props, speed, transition) {
      return this.each(function(){
        var elem = $(this),
            transition = transition || 'ease-out',
            speed = speed ? ((speed / 1000)+'s') : '.25s';
        props['-webkit-transition'] = 'all '+ speed +' '+ transition;
        elem.css(props);
      });
    },
    other: function(props, speed, transition) {
      return this.each(function(){
        var elem = $(this);
        elem.animate(props, speed, transition);
      })
    }
  });
})(jQuery);

platform.js

/** 

Good for memoing functions based on browser type.

Example:

  platform({
    webkit: function(){
      // If it's webkit, this function is returned...
    },
    mozilla: function() {
      // If it's mozilla (Firefox)...
    },
    opera: function() {
      // If it's opera...
    },
    msie: function() {
      // If it's ie
    },
    msie6: function() {
      // If it's ie version 6
    },
    other: function() {
      // If a brower type isn't found that matches, use this one...
    }
  });
*/

function platform(funcs) {
  var b = platform.browser;
  var tv = platform.browser.type_version, t = platform.browser.type;
  return funcs[tv] || funcs[t] || funcs['other'] || function(){ /*SHOULD THIS THROW AN ERROR? */ };
}

platform.browser = (function(){ // "Borrowed" from jQuery :-)
  var ua = navigator.userAgent.toLowerCase(),
      match = /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
        /(opera)(?:.*version)?[ \/]([\w.]+)/.exec( ua ) ||
        /(msie) ([\w.]+)/.exec( ua ) ||
        !/compatible/.test( ua ) && /(mozilla)(?:.*? rv:([\w.]+))?/.exec( ua ) ||
        ['','other', '0'];
  return { 
    type: match[1], 
    version: parseFloat(match[2]),
    type_version: match[1]+match[2]
  };
})();