diginext-utils/esm/array/randomIndex.js

README.md

/**
 * Returns a random index from an array.
 *
 * @template T - The type of elements in the array
 * @param array - The array to get a random index from
 * @returns A random index, or -1 if array is empty
 *
 * @example
 * ```ts
 * randomIndex([1, 2, 3, 4, 5]); // Random number between 0 and 4
 * randomIndex([]); // -1
 * ```
 */
export function randomIndex(array) {
    if (!Array.isArray(array) || array.length === 0) {
        return -1;
    }
    return Math.floor(Math.random() * array.length);
}
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