On 01.04.2025 at 00:03, Niels Dossche wrote:

> We live in an imperfect world, and we often approximate data, but neither 
> `==` nor `===` are ideal comparison operators to deal with these kinds of 
> data.
>
> Introducing: the "approximately equal" (or "approx-equal") operator `~=` (to 
> immitate the maths symbol ≃).
> This combines the power of type coercion with approximating equality.
> Who cares if things are actually equal, close enough amirite?
>
> First of all, if `$a == $b` holds, then `$a ~= $b` obviously.
> The true power lies where the data is not exactly the same, but "close 
> enough"!

IMO a step in the right direction, but it doesn't solve the problem that
the developer might not even know which equality operator to apply.
Thus, I proprose the whatever (?) equality (=) is right (->) here (!)
operator, e.g.

  $value1 ?=->! $value2

I leave the trivial implementation as exercise to the reader, while I'm
porting the even more powerful rmmadwim TCL command[1], which,
incidentially, also had been proposed on an April 1st.

[1] <https://core.tcl-lang.org/tips/doc/trunk/tip/131.md>

Christoph

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