Random Group Generator Split a list of names or items into random groups instantly. Perfect for classrooms, workshops, and team activities.

The tool works by first processing user input, which is a list of names or items entered one per line in a textarea. This input is parsed line-by-line using the `split` method with a newline character as the separator, and then each line is trimmed to remove leading and trailing whitespace using the `trim` method. The `filter` method is used to remove any empty lines from the input. The resulting array of items is then shuffled using the Fisher-Yates algorithm, which is implemented using a loop that iterates over the array from the last element to the first, swapping each element with another randomly chosen element. This shuffling process ensures an unbiased randomization of the items.

The shuffled array is then distributed into groups using a round-robin assignment strategy, where each item is assigned to a group in a cyclical manner. The number of groups is determined by the user's input, which is stored in the `groupCount` state variable. The distribution process uses the modulo operator to determine which group each item should be assigned to, ensuring that the items are distributed as evenly as possible among the groups. This process runs in O(n) time, where n is the number of items, and does not rely on any external dependencies beyond the React library and its built-in hooks, such as `useState` and `useCallback`. The use of React's `useCallback` hook helps to memoize the `generateGroups` function, preventing it from being recreated unnecessarily and improving performance.