23 lines
684 B
JavaScript
23 lines
684 B
JavaScript
//#region src/predicate/isNotNil.ts
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/**
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* Checks if the given value is not null nor undefined.
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*
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* The main use of this function is to be used with TypeScript as a type predicate.
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*
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* @template T - The type of value.
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* @param {T | null | undefined} x - The value to test if it is not null nor undefined.
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* @returns {x is T} True if the value is not null nor undefined, false otherwise.
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*
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* @example
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* // Here the type of `arr` is (number | undefined)[]
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* const arr = [1, undefined, 3];
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* // Here the type of `result` is number[]
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* const result = arr.filter(isNotNil);
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* // result will be [1, 3]
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*/
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function isNotNil(x) {
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return x != null;
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}
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//#endregion
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exports.isNotNil = isNotNil;
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