Function uniqueEntries

src/util.ts:693–698

(array: T[], isIdentical: (x: T, y: T) => boolean = (x, y) => (x === y))

// Keeps only the unique entries in an array, optionally with a custom comparison function
export function uniqueEntries<T>(array: T[], isIdentical: (x: T, y: T) => boolean = (x, y) => (x === y)){
    function uniqueFunction(v: T, index: number, array: T[]): boolean {
        return array.findIndex(v2 => isIdentical(v2, v)) === index;
    }
    return array.filter(uniqueFunction);
}