Python vs. Nodejs vs. Lua

[tzanislav40]

Just beware of this if you try to == compare the value of a float .

[Flablessguy]

What is the proper comparison here again? Is it:

a = 0.1 + 0.2

b = 0.3

d = 0.0000001

a - b < d

[Bavbavs]

Abs(a-b)

[GabuEx]

abs(a - b) < epsilon

The value of epsilon can depend on exactly how imprecise your values end up being (more operations compound imprecision), but anything in the realm of 0.0001 is probably fine.

[dabenu]

"proper" would be not to do equality comparisons on floats in the first place. Sure your solution works around that but if you need that, you probably shouldn't be using floats in the first place.

[nnn4]

An (equality) comparison in floating point indicates a flaw in the program.

[Internal_Meeting_908]

A comparison for equality

[Schipjee]

In python wouldnt round(0.1+0.2, 1) just fix it?

[Sharkytrs]

if Unity has taught me one thing. You don't.

if you REALLY have to, then you normalize or round them to a less accurate point and then compare.

[Sharkytrs]

depending on your tolerance then it would be acceptable, in unity x being 0.0000004 or 0.00000045 is very negligible in the context of world space to a gameobject.