Re: Lua 5.3: 1 Month of use

[Coda Highland <chighland@...>]

On Tue, Mar 4, 2014 at 9:36 AM, Roberto Ierusalimschy
<roberto@inf.puc-rio.br> wrote:
>> Please don't. :( There's no good way to do this. A
>> round-to-nearest-integer function should be sufficient for when people
>> have a float that needs to turn into an integer (where //1's flooring
>> behavior would be destructive on something like (1.0/3.0) * 3.0) but
>> trying to claim that a function is smart about knowing when a float is
>> actually an integer... not a good idea. MATLAB tries and gets subtle
>> errors as a result.
>
>   x == math.ifloor(x)    ?

If ifloor rounds that's very unexpected and unobvious behavior. I'd
expect ifloor(0.9999999) to return 0, but ifloor(1.000001) to return
1. Meanwhile, I would expect, say, iround(0.9999999) to return 1.

/s/ Adam