Re: table sort: IEEE floating-point number NaN?

If passing NaNs may cause a sorting algorithm to produce an error, that's a feature. You must not try to sort the unsortable (and if you do, you should be explicit about how you want it sorted). -Lars

On 25 April 2026 11:29:18 CEST, Sean Conner <[email protected]> wrote:
>It was thus said that the Great sur-behoffski once stated:
>> (Interesting discussion elided for briefness.)
>> 
>> Does the floating-point number NaN (assume IEEE754 etc.) always
>> compare as false to any other value, even another NaN?
>
>  Yes.  IEEE-754 requires that NaN is not equal to NaN.  You can see this
>yourself with Lua:
>
>	Lua 5.4.6  Copyright (C) 1994-2023 Lua.org, PUC-Rio
>	> x=0/0
>	> print(x,x==x)
>	nan	false
>
>  -spc
>
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