在交互式Scala控制台中打印整个结果
发布时间:2020-12-16 08:50:32 所属栏目:安全 来源:网络整理
导读:当我在 Scala交互式控制台中输入内容时,控制台会打印语句的结果.如果结果太长,控制台会裁剪它(向右滚动以查看它): scala Array.fill[Byte](5)(0)res1: Array[Byte] = Array(0,0)scala Array.fill[Byte](500)(0)res2: Array[Byte] = Array(0,...scala "a"*50
当我在
Scala交互式控制台中输入内容时,控制台会打印语句的结果.如果结果太长,控制台会裁剪它(向右滚动以查看它):
scala> Array.fill[Byte](5)(0) res1: Array[Byte] = Array(0,0) scala> Array.fill[Byte](500)(0) res2: Array[Byte] = Array(0,... scala> "a"*5000 res3: String = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa... 如何在没有裁剪的情况下为任何给定对象(不仅仅是集合或数组)打印相同或等效的输出? 解决方法
结果不是“裁剪”,只是println正在调用java.lang.Arrays.toString()(因为scala.Array是一个Java数组).
具体来说,Arrays定义了一个与Object一起使用的toString重载,它在每个元素上调用java.lang.Object的toString实现.这样的实现打印了对象的引用,所以你最终得到了 [Lscala.Tuple2;@4de71ca9 这是一个包含scala.Tuple2对象的引用4de71ca9的Array. 这已在this ticket年前讨论过. 在数组的特定情况下,您可以简单地做 println(x.mkString("n")) 要么 x foreach println 要么 println(x.deep) 更新 要回答上次编辑,可以设置REPL打印的字符串的最大长度 scala> :power ** Power User mode enabled - BEEP WHIR GYVE ** ** :phase has been set to 'typer'. ** ** scala.tools.nsc._ has been imported ** ** global._,definitions._ also imported ** ** Try :help,:vals,power.<tab> ** scala> vals.isettings.maxPrintString = Int.MaxValue vals.isettings.maxPrintString: Int = 2147483647 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |