How can you add a property to an Object that is not enumerable in a for...in loop?

What are the primitive data types in Javascript?

Output of the code: var a = 90100; function someFunc(){ if(false){ var a = 1; } else { var b = 2; } console.log(b); console.log(a); //(1) } someFunc();

If var a = 10, what will the result be of b with following syntax var b = a === 10 ? 'Sheldon' : 'Moonpie';

What's the output? function myFunction(param) { return arguments[1] || param; } myFunction(123, false, 'test')

What is newRay equal to at the end of the following code? var ray = []; ray['0'] = 1; ray['x'] = 2; var newRay = [] for( var i in ray ) { newRay.push( ray[ i ] ); }

Which is a valid syntax to create a function?

Which code sample will correctly search for the word 'for' in a string?

Most efficient way to clone a JavaScript object?

What kind of Typed Arrays representation of the pixels does Canvas ImageData return when you call ImageData.data?

Which method evaluates a string of JavaScript code in the context of the specified object?