Proper Noun Filter (1.4).js

//Complete properNounFilter()
// The function should return true if the word argument is a proper Noun (first letter is capitalized). It should return false if the word isn't a proper Noun, if the word is mixed case or if it is all caps

var properNounFilter = function(word) {
	var firstLetter = word.slice(0,1);
	var remainder = word.slice(1);
	
	if (firstLetter.toUpperCase() === firstLetter && remainder.toLowerCase() === remainder) return true;
	return false;
}


//Tests
console.log("this should be false: " + properNounFilter('euphoria'));
console.log("this should be true: " + properNounFilter('Einstein'));
console.log("this should be true: " + properNounFilter('Nebraska'));
console.log("this should be false: " + properNounFilter('ZOMGLOL'));
console.log("this should be false: " + properNounFilter('apOLLo'));

Proper Noun Filter (1.4)_console_dump.txt

Native Browser JavaScript

this should be false: false
this should be true: true
this should be true: true
this should be false: false
this should be false: false