2. var defaults = { validate: false, limit: 5, name: "foo" };
3.              var options = { validate: true, name: "bar" };
4.              // Merge defaults and options, without modifying defaults
5.              var settings = $.extend( {}, defaults, options );
6.              var printObj = typeof JSON !== "undefined" ? JSON.stringify : function( obj ) {
7. 
   
8.              var arr = [];
9.              $.each( obj, function( key, val ) {
10.              var next = key + ": ";
11.              next += $.isPlainObject( val ) ? printObj( val ) : val;
12.              arr.push( next );
13.              });
14.              return "{ " + arr.join( ", " ) + " }";
15.              };
16.              $( "#log" ).append( "defaults -- " + printObj( defaults ) + "" );
17.              $( "#log" ).append( "options -- " + printObj( options ) + "" );
18.              $( "#log" ).append( "settings -- " + printObj( settings ) + "" );

on line 6 is the function ever being called ? i mean does the ternary operator ever evaluate to false ?? 

i did a console.log('function called'); inside the function and did't get any console.logs

also please have a look at line 6 again : 

1. var printObj = typeof JSON !== "undefined" ? JSON.stringify : function( obj ) {

if u were a english teacher ,teaching Jquery how would the above statement really read out ? 

"check printObj" if it is a a JSON type if it is than JSON.stringify it , else execute the function . 

now a few more supplemetary but important questions : 

is't JSON.stringify suppose to be taking an argument ?? 

JSON.strngfy

now i call printObj like this : 

1.  $( "#log" ).append( "defaults -- " + printObj( defaults ) + "" );

going back to line 6 , specifically the below line 

1. typeof JSON !== "undefined"

what am i checking here ?? 

if printObj itself is typeof JSON ??

or defaults is typeof JSON ??

the confusion continues as i read line 6 ahead : 

1. JSON.stringify

now JSON.stringify what ??