Karam Fouad karam084

Ruby and Rails Interview Questions

What is a class?
What is an object?
What is a module? Can you tell me the difference between classes and modules?
Can you tell me the three levels of method access control for classes and modules? What do they imply about the method?
There are three ways to invoke a method in ruby. Can you give me at least two?
Explain this ruby idiom: a ||= b

	/* Polyfill indexOf. */
	var indexOf;

	if (typeof Array.prototype.indexOf === 'function') {
	indexOf = function (haystack, needle) {
	return haystack.indexOf(needle);
	};
	} else {
	indexOf = function (haystack, needle) {
	var i = 0, length = haystack.length, idx = -1, found = false;

	//PUT YOUR MIXPANEL TOKEN AND SECRET BELOW:
	const credentials = {
	"token": "your-mixpanel-token-here",
	"secret": "your-mixpanel-secret-here"
	}




	/*