dropRight() function

与えられた iterable の最後の length 個の要素を除くすべての要素を返します。

Signature:

declare function dropRight<A>(
  length: number,
  iterable: Iterable<A>,
): IterableIterator<A>;

Example

const iter = dropRight(2, [1, 2, 3, 4]);
iter.next(); // {done:false, value: 1}
iter.next(); // {done:false, value: 2}
iter.next(); // {done:true, value: undefined}

// with pipe
pipe([1, 2, 3, 4], dropRight(2), toArray); // [1, 2]

pipe("abcde", dropRight(2), toArray); // ["a", "b", "c"]

await pipe(Promise.resolve([1, 2, 3, 4]), dropRight(2), toArray); // [1, 2]

// with toAsync
await pipe(
  [
    Promise.resolve(1),
    Promise.resolve(2),
    Promise.resolve(3),
    Promise.resolve(4),
  ],
  toAsync,
  dropRight(2),
  toArray,
); // [1, 2]

see pipe, toAsync, toArray

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