mirror of
https://github.com/vercel-labs/scriptc.git
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Chris Tate
94fd361b54
Represent ordinary JavaScript arrays with hole, value, and explicit-undefined states; add sparse side storage and carry missing values through the frontend, native backends, runtime, and Node-facing consumers.
14 lines
528 B
TypeScript
14 lines
528 B
TypeScript
// Array-derived missing string keys use JavaScript ToPropertyKey: undefined -> "undefined".
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const keys: string[] = ["a"];
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keys.length = 2;
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const source: Record<string, string> = { a: "A", undefined: "U" };
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const target: Record<string, string> = {};
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for (const key of keys) {
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console.log("read", typeof key, source[key]);
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target[key] = typeof key;
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}
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console.log("write", target.a, target.undefined);
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const rows: { value: number }[] = [{ value: 1 }];
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for (const row of rows) console.log("keys", Object.keys(row).join(","));
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