isEven

isEven.js

// type you numbers you want to test and then type odne when you are done and this will read out the numbers wiht their boolean values indicating if they are even

const standardInputFromTheCommandLine = process.openStdin()
let arrayOfObjectsWithNumbersForKeysAndBooleansForValues = []

standardInputFromTheCommandLine.addListener('data', incomingData => {

	if (incomingData.toString().trim() == 'done') {
		process.stdin.emit("end")
	}

	let object = {}
	let key = incomingData.toString().trim()
	let value = isEven(incomingData)

	object[key] = value

  	arrayOfObjectsWithNumbersForKeysAndBooleansForValues.push(object)

})

// This function adds an event listener that fires when the comand line is done taking input
standardInputFromTheCommandLine.addListener('end', () => {
  	console.log(arrayOfObjectsWithNumbersForKeysAndBooleansForValues)
})

// This function uses the modulus of the incoming number and 2 to return a boolean indicating if it is even
var isEven = function(incomingNumber) {
	let number = Number(incomingNumber)
	if (isNaN(number)) {return NaN}
	return (number % 2) == 0
}