Web5 jan. 2024 · In the tutorial, Grokonez will show you how to work with Kotlin distinct() method of List collection. I. Practice 1. distinct() method distinct() method is used to return a list that contains only distinct elements. Method signature: public fun Iterable.distinct(): List – Work with simple list: val simpleList = listOf(1, 2, 3, 5, 3, … Web28 jul. 2024 · まず、mutableLIstからdistinctBy {}を呼び出します。 distinctBy {}のクロージャーに、itを記述します。 そして、distinctBy {}からtoMutableList ()を呼び出します。 val result : MutableList = list.distinctBy { it }.toMutableList () 上記のtoMutbaleList ()は、distinctBy ()を呼び出したMutableListの重複を削除したMutableListを返します。 スポン …
Kotlin の Collection まとめ ~List編~ - Qiita
Web编辑:我很好奇如何使用 distinctBy 与任何数量的属性,不只是像我上面的例子中的两个。. 你可以创建一对:. myObjectList.distinctBy { Pair (it.myField, it.myOtherField) } … Web17 jan. 2024 · use是Kotlin的一个内置的扩展函数,它能保证Lambda表达式中的代码全部执行完之后自动将外层的流关闭,这样我们就不需要再写一个finally语句,手动关闭流了。. * use函数内部实现也是通过try-catch-finally块捕捉的方式,所以不用担心会有异常抛出导致程序退出. File ... ヴァンダルハーツ 転職 おすすめ
Kotlin get unique elements from list using distinct and distinct by ...
WebdistinctBy is using selector against objects in the list will be distinguished. This is rarely used for primitives. In your case, creates two-keys map, for keys true and false, and only first two values will be mapped. I presume you want to filter out all numbers greater than 10, you must use .filter { it > 10 } instead. Share Improve this answer Web8 jan. 2024 · 1.0 fun Sequence.distinctBy( selector: (T) -> K ): Sequence (source) Returns a sequence containing only elements from the given sequence having distinct keys returned by the given selector function. Among elements of the given sequence with equal keys, only the first one will be present in the resulting sequence. Web21 mrt. 2024 · distinctBy は指定した条件を重複判定に用います。 val distinctList = listOf ( 1 , 1 , 2 , 3 , 4 , 4 ) println ( distinctList . distinct ()) println ( distinctList . distinctBy { it > 2 }) pagamento mutuo presso altra banca