Adding values in array prints values, and does not add in Angular

Question

I am trying to add some values within an array, but instead of outputting the sum, it prints the 2 values next to each other.

My array is:

$scope.values = [ {amount: 5}, {amount: 5} ] 

My function is:

$scope.total = function() { var total = 0; angular.forEach($scope.values, function(item) { total += item.amount; }) return total; } 

When i call {{ amountRemaining() }} it displays "55", instead of 10.

When i push another object to the array with a value of 6, it displays "556".

Another note to add, is that when i call {{values}}, it is placing the 5 inside "", which i think is the culprit.

"amount":"05" 

How would i ensure the number is an integer?

Answer 1

You should coerce it explicitly.

total += Number(item.amount); 

or

total += parseInt(item.amount); 

The latter will make the effort to extract any valid number from the parameter, the first one will check if it's a number and either parse it or be NaN.