Check if a moment contains a time?

Question

I'm trying to determine if a moment object was instantiated with a time value (in addition to a date). For example:

var date = moment("2014-01-16");
date.format("h:mm a"); // 12:00 am

and

var date2 = moment("2014-01-16 09:30");
date.format("h:mm a"); // 9:30 am

How can I ask date if it contains a time (and not just a default value)?

Answer 1

Well technically, the constructor that passes only a date IS instantiating it with a time, 12:00:00, even though it is implicit. Even so, here are some possible solutions.

From least safe and least work to most safe and most work:

1) Check if it's exactly equal to 12:00:00 and assume it was not set. Bad approach if your use-case has things happening around midnight often.

2) Don't ever instantiate a moment without explicitly specifying the time.

3) Wrap moment in a custom object, or create an entirely new custom object, capable of representing the null time case (a flag, nullable variable, etc.)