var lazy: LazySequence <Self>
A sequence containing the same elements as this sequence, but on which some operations, such as
map
and filter
, are implemented lazily.
このシーケンスと同じ要素を含んでいるシーケンス、しかしそれの上で何らかの演算、例えばmap
やfilter
が遅延に実装されます。
var underestimatedCount : Int
A value less than or equal to the number of elements in the sequence, calculated nondestructively.
シーケンスの中の要素数より少ないか等しい値、非破壊的に計算されます。