11 lines
311 B
TypeScript
11 lines
311 B
TypeScript
const otherValue = () => true;
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const value : number | string = null as any;
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function isNumber(obj: any): obj is number {
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return true; // method implementation irrelevant
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}
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// Bad case - fails
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if (isNumber((otherValue(), value))) {
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const b = value; // string | number , but should be number
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} |