lists.ts

export function dedupeLists<T>(listOfLists: T[][], hash: (obj: T) => string): T[][] {
    var all: { [hash: string]: boolean; } = {};
    var resultList: T[][] = [];
    
    listOfLists.forEach((list) => {
        var results: T[] = [];
        
        list.forEach((obj) => {
            var key = hash(obj);
            if (!all.hasOwnProperty(key)) {
                all[key] = true;
                results.push(obj);
            }
        });
        
        resultList.push(results);
    });
    
    return resultList;
}