Javascript: create a java-like static class

A static class is one you can never create a new instance of. For example, instead of having static methods in a JavaScript class, you can create a static class by declaring your functions as variables on a pure JavaScript Object. This method can be used for example for creating a class of utility functions:

var utils = {
 trim:function(str, numCharacters){
  return str.substring(0, numCharacters);
 },

 log:function(msg){
  if(console){
   console.log(msg);
  }
 }
}
var s = utils.trim("Good day to you sir", 4);

Source:

http://www.arpitonline.com/blog/2009/07/24/object-oriented-javascript-techniques/

ExtJS 4: get array data from store

var arrayData = Ext.pluck(store.data.items, 'data');

//arrayData = [ ["1", "value1"] , ["2","value2"] ]

Reference:

http://stackoverflow.com/questions/2526764/how-to-retrieve-json-data-array-from-extjs-store