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8 lines
375 B
TypeScript
8 lines
375 B
TypeScript
const values = [{ name: "first", id: 1 }].slice();
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const missing: { name: string; id: number }[] = [];
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values.push(missing[3]);
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// The array can hold undefined, so the callback ABI includes it; spreading
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// that arm cannot initialize the required fields inferred by TypeScript.
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const copies = values.map((value) => ({ ...value, label: "copy" }));
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console.log(copies.length);
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