Angular Watch Triggered if newValue changes - angularjs

Question

I want to change value's based on other values in a repeat. I made a watch but the thing is that if i alter the newValue inside the watch the watch is triggered again.
Is there a way to solve this problem
my watch:
$scope.$watch('objlist', function(newValue, oldValue) {
$scope.counter += 1;
for (var count = 0; count < newValue.length; ++count) {
if (typeof newValue[count] != "undefined" && (typeof oldValue == "undefined" || newValue[count].value1 != oldValue[count].value1)) {
newValue[count].value3 = newValue[count].value1 * newValue[count].value2;
newValue[count].value3 = Number(newValue[count].value3).toFixed(2);
}
if (typeof newValue[count] != "undefined" && (typeof oldValue == "undefined" || newValue[count].value3 != oldValue[count].value3)) {
newValue[count].value1 = newValue[count].value3 / newValue[count].value2;
newValue[count].value1 = Number(newValue[count].value1).toFixed(2);
}
}
}, true);
i have included a plunker to show you what i mean.
plunker
as you can see if you change the value of field 1 or 3 it automaticly adds 2 to the counter and sets both to toFixed(2). This makes it hard to edit the fields.
We use angular 1.2.25

Answer 1

You could use a small trick with a condition.
For instance :
$scope.watchActivated = true;
$scope.$watch('objlist', function(newValue, oldValue) {
if ( $scope.watchActivated ) {
$scope.watchActivated = false;
$scope.counter += 1;
for (var count = 0; count < newValue.length; ++count) {
if (typeof newValue[count] != "undefined" && (typeof oldValue == "undefined" || newValue[count].value1 != oldValue[count].value1) )
{
newValue[count].value3 = newValue[count].value1 * newValue[count].value2;
newValue[count].value3 = Number(newValue[count].value3).toFixed(2);
}
if (typeof newValue[count] != "undefined" && (typeof oldValue == "undefined" || newValue[count].value3 != oldValue[count].value3) )
{
newValue[count].value1 = newValue[count].value3 / newValue[count].value2;
newValue[count].value1 = Number(newValue[count].value1).toFixed(2);
}
}
$scope.watchActivated = true;
}
}, true);
Far from elegant but it should work.
Careful the code might not be good I just did a quick edit.