Hey Curtis! Great Post. Being in a junior position right now, your post may help me to improve my work life relationships and become a better human overall.

Nice writeup.

You got that right. Whenever we try to access an object property that doesn't exists, we get undefined . So we can use this feature to check if an object property exists or not. For example, let str = "The quick brown fox" let freq = {} str.split( "" ).forEach( char => { freq[char] === undefined ? freq[char] = 1 : freq[char] += 1 }) console .log(freq) This little piece of code makes JS objects behave like hashmaps and count the character frequency in the str string.

Thank for your response. Much appreciated.