mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-28 06:53:42 +08:00
Chris Tate
1ad47f1f77
- util.format %d and %i format bigint, symbol, null and undefined arguments - util.format %j prints [Circular] for circular arguments - util.types answers the remaining brand checks - util.inspect prints WeakMap, WeakSet, Date and numeric typed array values as Node does - util.inspect lowers the breakLength, compact and sorted options
30 lines
998 B
TypeScript
30 lines
998 B
TypeScript
// util.format and console.log %d / %i over arguments Node formats without a
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// number conversion: a bigint prints with its n suffix, a symbol as NaN,
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// null as 0 under %d and NaN under %i, and undefined as NaN. Arguments still
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// evaluate in order.
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import { format } from "node:util";
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const calls: string[] = [];
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function big(n: bigint): bigint {
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calls.push(`big ${n}`);
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return n;
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}
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function sym(): symbol {
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calls.push("sym");
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return Symbol("s");
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}
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function nothing(): undefined {
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calls.push("nothing");
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return undefined;
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}
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console.log(format("%d %i", 10n, -5n));
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console.log(format("%d", 2n ** 70n), format("%i", -(2n ** 65n)));
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console.log(format("%d|%i", 0n, 0n));
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console.log(format("%d %i", Symbol("x"), Symbol.iterator));
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console.log(format("%d %i", null, null));
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console.log(format("%d %i", undefined, undefined));
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console.log(format("%d-%i-%d", big(3n), sym(), nothing()), calls.join(", "));
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console.log("count %d of %i", 42n, 7n);
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console.log("missing %d", null, "extra");
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