Ufdjrw

return results == null ? 0 : ( results[1] || 0 );

the most terse solution would be to change return results[1] || 0; to return (results && results[1]) || 0.

You could try this:

if(typeof(results) == "undefined") 
 return 0;
 else 

return results==null ? 0 : ( results[1] || 0 );

return (results||0) && results[1] || 0;

The && operator acts as guard and returns the 0 if results if falsy and return the rightmost part if truthy.

if (typeof(results)!='undefined') 
 return results[1];
 else 
 return 0; 
;

But you might want to check if results is an array. Arrays are of type Object so you will need this function

function typeOf(value) 
 var s = typeof value;
 if (s === 'object') 
 if (value) 
 if (value instanceof Array) 
 s = 'array';
 
 else 
 s = 'null';
 
 
 return s;

So your code becomes

if (typeOf(results)==='array')
 return results[1];

else

 return 0;

All mentioned solutions are legit but if we're talking about elegance then I'll pitch in with the following example:

//function that checks if an object is null
var isNull = function(obj) 
 return obj == null;
 

if(isNull(results))
 return 0;
 else 0;

Using the isNull function helps the code be more readable.

I prefer the style

(results || [, 0]) [1]

Why not try .test() ? ... Try its and best boolean (true or false):

$.urlParam = function(name)
 var results = new RegExp('[\?&]' + name + '=([^&#]*)');
 return results.test(window.location.href);

Tutorial:
http://www.w3schools.com/jsref/jsref_regexp_test.asp

I'm using this function

function isNull() 
 for (var i = 0; i < arguments.length; i++) 
 if (
 typeof arguments[i] !== 'undefined'
 && arguments[i] !== undefined
 && arguments[i] != null
 && arguments[i] != NaN
 && arguments[i] 
 ) return arguments[i];
 

test

console.log(isNull(null, null, undefined, 'Target'));

You can also use the not operator. It will check if a variable is null, or, in the case of a string, is empty. It makes your code more compact and easier to read.

For example:

var pass = "";
if(!pass)
 return false;
else
 return true;

This would return false because the string is empty. It would also return false if the variable pass was null.