String interpolationString interpolation is defining a string literal with one or more placeholders, these placeholders are to be replaced with variables or expressions while the final compilation of the result.Exampleobject MyClass { def main(args: Array[String]) { var bikename = "KTM Duke 390"...
Calling thereplacemethod on aStringresults in returning a new modified string. The original string is not changed. sb.setCharAt(0, 'K') sb.setCharAt(2, 't') ThesetCharAtmethod of aStringBuilderwill replace a character at the given index with a new character. The original string is modified....
// src/main/scala/progscala2/patternmatching/infix.sc scala> case class With[A,B](a: A, b: B) defined class With scala> val with1: With[String,Int] = With("Foo", 1) with1: With[String,Int] = With(Foo,1) scala> val with2: String With Int = With("Bar", 2) with2: Wit...
下面是我从列表中查找最大值的代码 object kp { def main(args: Array[String]) { def max(xs: List[Int]): Int = xs match { case Nil => throw new java.util.NoSuchElementException() case List(x: Int) => x case x :: y :: rest => max( (if (x > y) x else y) :: rest ...
We iterate through it with foreach. We use a _ placeholder shortcut again in another function literal that we pass to foreach. In this case, each string in the collection is passed as an argument to scala.Console.printf, another function imported from Predef, which takes a format string ...
Row key field of the table connected to DLI. The single and composite row keys are supported. A single row key can be of the numeric or string type. The length does not need to be specified. The composite row key supports only fixed-length data of the string type. The format isattribut...
Scala编程语言入门教程说明书
def readFile[T: TypeInformation](inputFormat: FileInputFormat[T], filePath: String, watchType: FileProcessingMode, interval: Long): DataStream[T] def socketTextStream(hostname: String, port: Int, delimiter: Char = '\n', maxRetry: Long = 0): DataStream[String] ...
I am raising it here because I have no idea how this can happen. Restarting the presentation compiler doesn't help only restarting the whole JVM does. It's also not possible to reproduce it reliably. What is more when debugging I managed...
Use theMulti-line stringstab in Scala settings to set a different format for multi-line string options such asMargin charindent or disable a multi-line strings support. PressCtrlAlt0Sto open settings and then selectEditor | Code Style | Scala. Then, on theScalapage, select theMulti-line str...