CODEWITHSUNDEEP
javascriptangularjs
olivier
olivier

Reputation: 2645

Using the length function returns undefined

I'm trying to check if my variable only has a length of one.

I do this like so: 

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);
}

but $scope.h.length returns undefined. Why? How should i do this better?

Upvotes: 1

Views: 774

Answers (3)

Adam Kettani
Adam Kettani

Reputation: 93

getHours() returns a number. Numbers do not have a length property. Try converting your number to a string first with $scope.h.toString().

Upvotes: 0

Gray Fox
Gray Fox

Reputation: 357

You don't need to check length in your case.

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

Upvotes: 3

Weedoze
Weedoze

Reputation: 13943

You were using Date.prototype.getHours() thta return an integer number thus you cannot directly use .length on it.

The solution is to use the toString() function before taking the length

OR

You can use = "" + h

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

var hString = "" + h;
var mString = m.toString();

console.log(hString.length);
console.log(mString.length);

Upvotes: 3

Related Questions