Pass a JavaScript function as parameter

Question

How do I pass a function as a parameter without the function executing in the \"parent\" function or using eval()? (Since I\'ve read that it\'s insecure.)

Answer 1

Here it's another approach :

function a(first,second)    
{        
return (second)(first);           
}     

a('Hello',function(e){alert(e+ ' world!');}); //=> Hello world