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Chris Tate
2367c081bf
* Coerce static string search positions * Record TypeScript parity for string search fixture
20 lines
847 B
JavaScript
20 lines
847 B
JavaScript
let trace = "";
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function receiver() { trace += "r"; return "abcde"; }
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function needle() { trace += "n"; return "bc"; }
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function position() { trace += "p"; return "1.9"; }
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console.log(receiver().indexOf(needle(), position()), trace);
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trace = "";
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console.log(receiver().includes(needle(), position()), trace);
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trace = "";
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console.log(receiver().indexOf(needle(), void position()), trace);
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trace = "";
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console.log(receiver().includes(needle(), void position()), trace);
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/** @type {(number | string | boolean | null | undefined)[]} */
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const positions = [undefined, null, false, true, "", "2.9", "bad", NaN, -Infinity, -3, 0, 1, 3, Infinity, 99];
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for (const value of positions) {
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const text = "a😀bc😀d";
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console.log(text.indexOf("😀", value), text.indexOf("", value));
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console.log(text.includes("bc", value), text.includes("", value));
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}
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