Convert array to Hex String

gistfile1.txt

var arr = [127, 1128, 5, 31];

function toHexString(array){
	var result = [];
	for(var i in array){
		// directly toString()
		result.push(array[i].toString(16));
	}
	return result;
}

function toHexStringWithPadding(array, len){
	var result = [];
	var str = "";
	for(var i in array){
		// Add correct number of leading zeros before toString str,
		// this will format the result to specific(len arg) chars correctly.
		str = array[i].toString(16);
		result.push( "0".repeat(len - str.length) + str);
	}
	return result;
}

console.log("Compare the results from this two functions:");
console.log(toHexString(arr));
console.log(toHexStringWithPadding(arr, 4));