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We have already seen how we can use a dictionary to group related data together, and how we can use functions to create shortcuts for commonly used groups of statements.
A function performs an action using some set of input parameters.
For example, the last minute of the year 1995 was 61 seconds long, thanks to an added leap second.
Most computer clocks are not accurate enough to be able to reflect the leap-second distinction.
The Date object you create is a snapshot of an exact millisecond in time. It is important to understand that once the Date Object is created, the date and time that it contains do not change.
If the parameters are left out when you create a Date Object, it contains the date and time that your computer clock is at.
Sometimes we write objects which map very intuitively onto things in the real world.
For example, if we are writing code to simulate chemical reactions, we might have object.
You should be able to try out most of the examples below by just copying them to your browser's Java Script Console (Chrome, Safari with Develop menu activated, IE 8 ) or Firebug console (Firefox). It allowed the interpretation of dates as year, month, day, hour, minute, and second values.It also allowed the formatting and parsing of date strings.The code to do so, will look like this: var today = new Date() You can also create a Date object for a specific date and time.You will want to do this to be able to determine specific information on a particular date such as what day of the week it falls on and to allow you to do calculations with dates such as getting the number of days between two dates.