Both of these statements ring true for me.

<([ceiling v] of (5)) = [5]>
<([ceiling v] of (5.0)) = [6]>

I know it has to do with computational error due to how computers store decimals… but still, seems like a bit of awkward behaviour that could probably be fixed easily.

Anyway, just in case it's just one browser or computer, I noticed this behaviour with these specs:
My browser / operating system: Windows 7, Microsoft Internet Explorer 11.0, Flash 12.0 (release 0)

It's because there's no such thing as zero point zero for some strange reason. Zero point zero is no longer zero… **
(And, no, it shouldn't be ‘rounding error’ since computers should store floating-point zero exactly.)

Try this (and weep)…

say ( (0.0) - (0) )

S'pose this should be reported as a bug, so I've done that: http://github.com/LLK/scratch-flash/issues/582

EDIT: should mention this project also demonstrates the bug: http://scratch.mit.edu/projects/36859670/

** Perhaps this reaction may be more appropriate: 0.0

–Added to the Official Bugs and Glitches List–

DadOfMrLog wrote:

It's because there's no such thing as zero point zero for some strange reason. Zero point zero is no longer zero… **
(And, no, it shouldn't be ‘rounding error’ since computers should store floating-point zero exactly.)

Try this (and weep)…

say ( (0.0) - (0) )

S'pose this should be reported as a bug, so I've done that: http://github.com/LLK/scratch-flash/issues/582

EDIT: should mention this project also demonstrates the bug: http://scratch.mit.edu/projects/36859670/

** Perhaps this reaction may be more appropriate: 0.0

Lol… xD not quite what I was expecting. also if you try 1.0 - 0, the error appears to become larger? IDK…

Thanks for the bug report. ;P

ceiling 21 = 21, and ceiling 21.0= 22. Weird.



My browser / operating system: Windows 7, Chrome 35.0.1916.153, Flash 14.0 (release 0)

This is a floating-point error.

Floating-point error:
An issue when computers cannot calculate large numbers precisely.
Example, 1,000,000,000 becomes 1,000,001,211.
This annoys me in my project with many blocks. The block with the issue that annoys me is in Sensing.

SuperSonicmario wrote:

Floating-point error:
An issue when computers cannot calculate large numbers precisely.
Example, 1,000,000,000 becomes 1,000,001,211.
This annoys me in my project with many blocks. The block with the issue that annoys me is in Sensing.

Which one? Is it the

(distance to [Sprite1 v])

block?

I just created a pull-request with a fix for this ( https://github.com/LLK/scratch-flash/pull/698 ). Hopefully we can get it merged soon if it looks good to other developers. Thanks for all of the information about this issue!

They fixed the bug in this update: https://scratch.mit.edu/discuss/topic/107954/
I just tried the ceiling glitch and the subtraction glitches. The ceiling of 5 is 5, the ceiling of 5.0 is 5, 0.0 minus 0 is 0, and 1.0 minus 0 is 1.

OxySean wrote:

They fixed the bug in this update: https://scratch.mit.edu/discuss/topic/107954/
I just tried the ceiling glitch and the subtraction glitches. The ceiling of 5 is 5, the ceiling of 5.0 is 5, 0.0 minus 0 is 0, and 1.0 minus 0 is 1.

Yep! Closing as fixed. Please report this thread to reopen it if the issue pops up again.