typia/lib/internal/_randomArray.mjs

Superfast runtime validators with only one line

import { _isUniqueItems } from "./_isUniqueItems.mjs";
import { _randomInteger } from "./_randomInteger.mjs";
//#region src/internal/_randomArray.ts
const DEFAULT_MIN_ITEMS = 1;
const DEFAULT_RANGE = 5;
const DEFAULT_RECURSIVE_RANGE = 2;
const _randomArray = (props) => {
	const defaultMinimum = props.recursive === true ? 0 : DEFAULT_MIN_ITEMS;
	const minimum = props.minItems ?? Math.min(props.maxItems ?? defaultMinimum, defaultMinimum);
	const count = _randomInteger({
		type: "integer",
		minimum,
		maximum: props.maxItems ?? minimum + (props.recursive === true ? DEFAULT_RECURSIVE_RANGE : DEFAULT_RANGE)
	});
	if (props.uniqueItems !== true) return new Array(count).fill(null).map((_, i) => props.element(i, count));
	const elements = [];
	const maximumAttempts = count * 100 + 1e3;
	for (let attempts = 0; elements.length !== count; attempts++) {
		if (attempts === maximumAttempts) throw new Error("Unable to generate enough unique items; the element domain may be too small.");
		const candidate = props.element(elements.length, count);
		if (elements.every((element) => _isUniqueItems([element, candidate]))) elements.push(candidate);
	}
	return elements;
};
//#endregion
export { _randomArray };

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