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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.
11 lines
481 B
TypeScript
11 lines
481 B
TypeScript
// Optional values carried through locals and function returns still occupy the UNDEFINED state.
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const source: number[] = [12];
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const missing = source[8];
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function maybe(values: number[]): number {
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return values[8];
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}
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const localLiteral = [missing, source[0]];
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const returnedLiteral = [maybe(source), source[0]];
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console.log("local", localLiteral.length, localLiteral[0], localLiteral[1]);
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console.log("returned", returnedLiteral.length, returnedLiteral[0], returnedLiteral[1]);
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