uuid - JAVASCRIPT - dateobj.getTime for a UID - Is the length not fixed? - Stack Overflow

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I'm using the following 2 lines of JS to create a UID:

var UID = dateobj.getTime();
UID = String(UID).substr(4);

It appears that sometimes it generates a number like:
564929300
other times like:
56492930

Problem is the length isn't consistent which is messing things up. Any ideas how that's possible and if there is a way to fix this or a better way to make a UID with JS?

Thanks

I'm using the following 2 lines of JS to create a UID:

var UID = dateobj.getTime();
UID = String(UID).substr(4);

It appears that sometimes it generates a number like:
564929300
other times like:
56492930

Problem is the length isn't consistent which is messing things up. Any ideas how that's possible and if there is a way to fix this or a better way to make a UID with JS?

Thanks

• javascript
• uuid

Share Improve this question Follow edited Jul 13, 2010 at 23:27 Yacoby 55.5k1616 gold badges117117 silver badges121121 bronze badges asked Jul 13, 2010 at 23:26 AnApprenticeAnApprentice 111k202202 gold badges637637 silver badges1k1k bronze badges 1

• what date range are you dealing with? – meder omuraliev Commented Jul 13, 2010 at 23:30

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 8

I like doing Math.random().toString(36).substr(2,9)

There one implementation here: http://blog.shkedy./2007/01/createing-guids-with-client-side.html

Here it is in action: http://jsfiddle/7sXL6/

I threw together a smaller version of it: http://jsfiddle/7sXL6/4/

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