| 363 | } |
| 364 | |
| 365 | public distinct<U>(key?: ArrayFunc<T, U>, comparator?: ArrayComparator<U>): DataArray<T> { |
| 366 | if (this.values.length == 0) return this; |
| 367 | let realKey = key ?? ((x) => x as unknown as U); |
| 368 | |
| 369 | // For similar reasons to groupBy, do a sort and take the first element of each block. |
| 370 | let intermediate = this.map((x, index) => { |
| 371 | return { key: realKey(x, index, this.values), value: x }; |
| 372 | }).sort((x) => x.key, "asc", comparator); |
| 373 | comparator = comparator ?? this.defaultComparator; |
| 374 | |
| 375 | let result: T[] = [intermediate[0].value]; |
| 376 | for (let index = 1; index < intermediate.length; index++) { |
| 377 | if (comparator(intermediate[index - 1].key, intermediate[index].key) != 0) { |
| 378 | result.push(intermediate[index].value); |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | return this.lwrap(result); |
| 383 | } |
| 384 | |
| 385 | public every(f: ArrayFunc<T, boolean>): boolean { |
| 386 | return this.values.every(f); |