mirror of
https://github.com/Baidicoot/rpncalc-v4
synced 2025-10-31 15:43:00 +00:00
45 lines
1.5 KiB
HTML
45 lines
1.5 KiB
HTML
<html>
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<style>
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* {
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background-color: #101020;
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color: ghostwhite;
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}
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</style>
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<h1>RPNCalc V4 Public Testing</h1>
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<p>@ me (aidanprattewart@protonmail.com) if you have any errors, with console output please.</p>
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<textarea type="text" id="inbox"></textarea>
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<button id="submit">execute</button>
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<pre id="outbox"></pre>
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<script src="./main.js" type="module"></script>
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<p>
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<h2>Docs</h2>
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<h3>Lambda Syntax</h3>
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lambda: <code>a b -> b a</code>
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parensed lambda: <code>(a -> a)</code>
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<h3>Let-In Syntax</h3>
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not called immediately; call-by-name
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<br>
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let: <code>(name; value1 value2)</code> N.B. when called, applies (pushes) both values to the stack
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<br>
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example named function: <code>(++; x -> x 1 +)</code>
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<h3>Pairings</h3>
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<code>1 2 pair</code> evaluates to <code>{1, 2}</code>
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<br>
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can call <code>fst</code> and <code>snd</code> on pairs
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<h3>Partials</h3>
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<code>'+</code> pushes (not applies) a closure onto the stack
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<br>
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<code>1 +</code> is a partially applied function/closure
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<h3>Type Literals</h3>
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Essentialy strings.
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<br>
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Example useage: <code>"1 "int coerce 1 +</code>
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<h3>Equality</h3>
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Internaly JS-based, derived for all objects, pushes lambdas representing true and false onto the stack.
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For example: <code>"true-option "false-option val1 val2 ==</code>
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<h2>Examples</h2>
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factorial: <code>(!; x -> 1 '(-> x 1 - ! x *) x 0 ==)</code>
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<br>
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fold (stops at type literal <code>"stop</code>): <code>(fold; x acc fn -> '(-> acc) '(-> x acc fn 'fn fold) 'x \"stop ==)</code>
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</p>
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</html> |