Shortest js compare function, by I machines

I asked 6 different AI machines

I want a shortest possible javascript function. Input parameters: a and b (both can be of any type). Output: if a < b then return an arbitrary negative number, if a > b then return an arbitrary positive number, if a equals b then 0.

(This is a standard, very common "compare" function.)

-- Date: 7 Oct 2024.
-- All using unpaid versions as available on the internet.
-- Only Claude required a login.

Google Gemini, MS Copilot, Phind, Perplexity, Claude all produced the same result:
(a, b) => a < b ? -1 : a > b ? 1 : 0

Only "Chatgpt 4o mini" produced:
(a, b) => (a > b) - (a < b)

(The first one is commonly known. I'd be interested to know who has ever heard of the second one. The first one: 13 elements, the second one: 7 elements, by one way of counting.)

 

Afterwards I asked Chatgpt

Which of the above functions will execute faster in real time?

It answered, as I expected:

• Number of comparisons: f1 always performs two comparisons regardless of the input. f2 may perform only one comparison if the first condition (a < b) is true.
• Operation cost: Both functions return a small, constant amount of data, but the arithmetic in f1 involves a subtraction, which could be slightly more expensive than just returning a value directly.
• Conclusion: In most cases, f2 would be faster due to potentially needing only one comparison and avoiding the subtraction operation.

 

My conclusion

This suggests to me that, within the limits of this small experiment, "ChatGPT 4o mini" distinguishes itself with a more capable and deeper calculation power than the other five.

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