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Weird <- operator

Started by CRAZY COCONUT COW May 9, 2004 at 1:25 AM 5 replies 550+ views

Original Post

May 9, 2004 at 1:25 AM

I was reading this article http://ai-depot.com/LogicGames/MiniMax.html and I see this MinMove (GamePosition game) { best_move <- {}; moves <- GenerateMoves(game); ForEach moves { move <- MaxMove(ApplyMove(game)); if (Value(move) > Value(best_move)) { best_move <- move; } } What is that crazy <- operator? A result of overloading?

CRAZY COCONUT COW

Author

CRAZY COCONUT COW

May 9, 2004 at 1:26 AM

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Miserable

May 9, 2004 at 1:40 AM

Looks like assignment to me. What language is this in? Might it be some form of pseudocode?

Sneftel

296

Sneftel

May 9, 2004 at 1:45 AM

Yeh, that looks like it''s just pseudocode. In pseudocode, you often see a left-facing arrow used for assignment, in order to disambiguate the equality operator.

"Sneftel is correct, if rather vulgar." --Flarelocke

CRAZY COCONUT COW

Author

CRAZY COCONUT COW

May 10, 2004 at 12:08 AM

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RuneLancer

May 10, 2004 at 12:15 AM

quote:
Original post by Sneftel
Yeh, that looks like it''s just pseudocode. In pseudocode, you often see a left-facing arrow used for assignment, in order to disambiguate the equality operator.

"Sneftel is correct, if rather vulgar." --Flarelocke

I was gonna say, that''s "less-than-minus", but then I realized such a thing doesn''t exist.

Sneftel

296

Sneftel

May 10, 2004 at 12:31 AM

sure it does. In fact, this is valid (if meaningless) C++ code:


int main()
{
    int i;
    i <- 3;
}

What happens: the compiler treats the - as unary negation, sees whether the uninitialized variable i is less than negative three, and immediately discards the result. Useless, but interesting.

"Sneftel is correct, if rather vulgar." --Flarelocke

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