On Nov 10, 2009, at 8:00 PM, Noah Slater wrote:
On 11 Nov 2009, at 00:52, Adam Kocoloski wrote:
Hi Noah, I think the part you're missing is that JavaScript does
not actually have integers. All numbers are internally represented
using double-precision floating point. So in fact a number that
looks like an integer can be corrupted. Easiest way to see this,
as Roger pointed out, is to try to enter something like
9223372036854775807
as the value for a field in Futon. You can't do it, Futon will
corrupt it and give you back
9223372036854776000
Isn't it just the case that there is a ceiling for representable
integers, then?
Yes, that's correct. The awkward part is that if you exceed that
ceiling JS doesn't complain, it just starts rounding. A surprising
result for a developer coming from, well, any other language that I
know of.
Adam
