T.array

A collection: one shape, a fuzzed count.

T.array(T.string.whereby({ length: { max: 15 } })).whereby({
  length: { min: 0, max: 10 },
});

Every element comes from the same schema, and the count is drawn uniformly from [length.min, length.max] inclusive by default. length.min defaults to 0 — an empty array is a legitimate outcome when you don't set a minimum, not an edge case to special-case around. Either end can be exclusive: { min: { value: 0, exclusive: true }, max: 10 } never yields empty.

For a fixed number of independently typed slots, see T.tuple. For drawn keys instead of indices, see T.record.