JS控制台和Rails控制台以不同的方式同时打印是正常的吗？

Question

I have a date_time October 5th, 2000, 00:00. Printing it with the js console and the rails console return the same first six digits, but then the js console adds three zeros at the end. Should this be expected behavior?

var date = new Date(2000, 10, 5);
date.getTime();
=> 970722000000


Date.new(2000,10,5).to_time.to_i
=> 970722000 

Answer 1

As Tushar said, javascript's Date.getTime returns milliseconds.

You can see the reference for the Date class here: http://www.w3schools.com/jsref/jsref_obj_date.asp

It's not obvious how to get a Unix timestamp from that page, but apparently there is a Date.now() function that is supported post IE 8: http://www.ecma-international.org/ecma-262/5.1/#sec-15.9.4.4

So for Javascript:

Date.now()     //seconds - this doesn't seem to work, despite what Google says
Math.floor(new Date().getTime() / 1000) //so for seconds you're probably stuck with this
Date.getTime() //milliseconds

The corresponding millisecond and second timestamps for Ruby are elaborated here: How to get the current time as 13-digit integer in Ruby?

To plagiarize the top answer there:

require 'date'

p DateTime.now.strftime('%s') # "1384526946" (seconds)
p DateTime.now.strftime('%Q') # "1384526946523" (milliseconds)