When utilizing the length function, the result is always returned as undefined

I am grappling with the task of verifying whether my variable only contains a single character.

The approach I have taken involves:

var n = new Date();
$scope.h = n.getHours();
$scope.m = n.getMinutes();

console.log($scope.h.length) // returns undefined

if($scope.h.length < 2 && $scope.m.length < 2 ) {
    $scope.hm = $scope.h * 10 + "" + $scope.m * 10;
    console.log($scope.hm);
}

However, the issue arises when $scope.h.length yields undefined. The question is - why does this happen? How can I improvise on this method?

javascriptangularjs

Answer №1

When using Date.prototype.getHours(), it returns an integer value. Therefore, directly calling .length on it will not work.

To solve this issue, you can use the toString() function before calculating the length.

Alternatively,

You could convert the integer to a string by concatenating with an empty string like this: = "" + h

var currentDate = new Date();
var hours = currentDate.getHours();
var minutes = currentDate.getMinutes();

var hoursToString = "" + hours;
var minutesToString = minutes.toString();

console.log(hoursToString.length);
console.log(minutesToString.length);

Answer №2

There is no need to verify the length for your specific scenario.

if($scope.h < 10 && $scope.m < 10 ) {

Answer №3

The method getHours() will output a numerical value, which does not have a length property associated with it. To resolve this issue, you can convert the number to a string by using $scope.h.toString().

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