Large int changed by Ajax

Question

I have a weird (and rather frightening) problem with Ajax.
I'm returning 3 large integers from PHP back to Javascript (jQuery):
9849933840800076
9717106838244944
9261288452893495
But recieve:
9849933840800076
9717106838244944
9261288452893496

Notice the last digit in the third integer - WTF ?!?
- I'm logging everything, and am certain it's not my code doing it!
And returning them as strings instead does solve the problem, but still...
It would be nice to get an explanation - and some sleep : )

Arh. You're right - I did it again : ) – T4NK3R Oct 24 '11 at 08:33 — T4NK3R, Oct 24 '11 at 08:33

score 2 · Accepted Answer · answered Oct 24 '11 at 08:37

2

My fault, sorry. (and thank you, Pekka)
JS "looses precision" on integers larger than 2^53 (+/- 9007199254740992)
- Back to the wriggleroom..

answered Oct 24 '11 at 08:37

T4NK3R

4,245
3
23
25

score 0 · Answer 2 · answered Oct 24 '11 at 14:41

0

in these kind of cases you can always return the numbers as strings and convert them in the js

answered Oct 24 '11 at 14:41

zion ben yacov

715
6
13

Nope! The problem IS in js. I have to stay out of the "9-series" (16-digit integer iDs) – T4NK3R Oct 26 '11 at 20:22

Large int changed by Ajax

2 Answers2