mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-23 06:10:02 +08:00
Chris Tate
b40a6f6079
- Keep generic bindings and short-circuit writes scoped to their native execution context. - Compile Map and Set copies, tuple callbacks and searches, and string-pattern replacement. - Exercise production frontend registries without Node and preserve mutation, identity, and evaluation order.
39 lines
2.1 KiB
TypeScript
39 lines
2.1 KiB
TypeScript
export {};
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const words: [string, string, string] = ["a", "b", "a"];
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console.log(words.includes("a"), words.includes("z"));
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console.log(words.indexOf("a"), words.lastIndexOf("a"));
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for (const position of [-Infinity, -4, -2, -0, 0, 1, 2, 3, Infinity, NaN]) {
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console.log(words.includes("a", position), words.indexOf("a", position), words.lastIndexOf("a", position));
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}
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const asArray = words as readonly string[];
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console.log(asArray.includes("b"), asArray.indexOf("b"), asArray.lastIndexOf("a"));
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const heterogeneous: [string, number, number | undefined] = ["a", NaN, undefined];
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console.log(heterogeneous.includes(NaN), heterogeneous.indexOf(NaN), heterogeneous.lastIndexOf(NaN));
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console.log(heterogeneous.includes(undefined), heterogeneous.indexOf(undefined), heterogeneous.lastIndexOf(undefined));
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let trace = "";
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function source(): [string, string, string] { trace += "S"; return words; }
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function needle(): string { trace += "N"; words[0] = "x"; return "x"; }
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function position(): number { trace += "P"; words[1] = "x"; return 1; }
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console.log(source().includes(needle(), position()), trace);
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trace = "";
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console.log(source().lastIndexOf(needle(), position()), trace);
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const object = { id: 1 };
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const references: [typeof object, typeof object] = [{ id: 1 }, object];
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console.log(references.includes(object), references.indexOf(object), references.lastIndexOf(object));
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console.log(references.includes({ id: 1 }), references.lastIndexOf({ id: 1 }));
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const strings: string[] = ["a", "bb", "a", "😀", "bb"];
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const equalValue = "b".repeat(2);
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console.log(strings.lastIndexOf(equalValue), strings.lastIndexOf("missing"));
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console.log(strings.lastIndexOf("😀"), strings.lastIndexOf("a", -2));
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const sparse: string[] = new Array<string>(4);
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sparse[1] = "a";
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console.log(sparse.lastIndexOf("a"), sparse.lastIndexOf(""));
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const bigints: bigint[] = [12345678901234567890n, 1n, 12345678901234567890n];
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console.log(bigints.lastIndexOf(BigInt("12345678901234567890")), bigints.lastIndexOf(2n));
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const booleans = [false, true, false];
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console.log(booleans.lastIndexOf(false), booleans.lastIndexOf(true));
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