jwvh
2020-11-28 09:05:32
indexWhere() 可以完成大部分繁重的工作。
def insertHere(ns:Seq[Int], elem:Int):Int = {
val idx = ns.indexWhere(_ > elem)
if (idx < 0) ns.length
else idx
}
insertHere( List(1,2,2,3,4,4,6,6), 2) // 3
insertHere( Seq(1,2,2,3,4,4,6,6), 3) // 4
insertHere( Array(1,2,2,3,4,4,6,6), 5) // 6
insertHere(Vector(1,2,2,3,4,4,6,6),-3) // 0
insertHere( List(1,2,2,3,4,4,6,6),12) // 8
当elem应在末尾附加时，这将返回不存在的索引。
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