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20 lines
638 B
TypeScript
20 lines
638 B
TypeScript
/**
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* Normalizes data that is a rest parameter or an array into an array with a depth of 1.
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*
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* @typeParam T - The data that must satisfy {@link RestOrArray}.
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* @param arr - The (possibly variadic) data to normalize
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*/
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export function normalizeArray<T>(arr: RestOrArray<T>): T[] {
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if (Array.isArray(arr[0])) return arr[0];
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return arr as T[];
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}
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/**
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* Represents data that may be an array or came from a rest parameter.
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*
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* @remarks
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* This type is used throughout builders to ensure both an array and variadic arguments
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* may be used. It is normalized with {@link normalizeArray}.
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*/
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export type RestOrArray<T> = T[] | [T[]];
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