What is the Scala identifier "implicitly"?
I have seen a function named implicitly used in Scala examples. What is it, and how is it used? Example here: scala> sealed trait Foo[T] { def apply(list : List[T]) : Unit }; object Foo { | implicit def stringImpl = new Foo[String] { | def apply(list : List[String]) = println("String") | } | implicit def intImpl = new Foo[Int] { | def apply(list : List[Int]) = println("Int") | } | } ; def foo[A :
What does the `#` operator mean in Scala?
I see this code in this blog: Type-Level Programming in Scala: // define the abstract types and bounds trait Recurse { type Next <: Recurse // this is the recursive function definition type X[R <: Recurse] <: Int } // implementation trait RecurseA extends Recurse { type Next = RecurseA // this is the implementation type X[R <: Recurse] = R#X[R#Next] } object Recurse { // infinite loop type C = Rec
Java compile speed vs Scala compile speed
I've been programming in Scala for a while and I like it but one thing I'm annoyed by is the time it takes to compile programs. It's seems like a small thing, but with Java I could make small changes to my program, click the run button in NetBeans, and boom, it's running, and over time compiling in Scala seems to consume a lot of time. I hear that with many large projects, a scripting language bec
Using Scala traits with implemented methods in Java
Answer From Java perspective Trait.scala is compiled into Trait interface. Hence implementing Trait in Java is interpreted as implementing an interface - which makes your error messages obvious. Short answer: you can't take advantage of trait implementations in Java, because this would enable multiple inheritance in Java (!) How is it implemented in Scala? Long answer: so how does it work in Scala
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
scala mapreduce exception: java.lang.ClassNotFoundException: scala.Function2
what is the "self" meaning in new class of scala
How to keep RDD persisted and consistent?
Akka-Streams collecting data (Source -> Flow -> Flow (collect) -> Sink)
Directive to complete with RandomAccessFile read
Creating Dataframe which uses BigInteger throws scala.MatchError: class java.math.BigInteger (of class java.lang.Class)
Why List.fill method has two group of parameters instead of one?
Why if for V <: Seq[Int] when V is a Seq descendant map and zip operations return a Seq[Int]
Sorting by DateTime in Slick
Spark/Scala: RDD[List<String>] to RDD[Custom Object]
How to use DataFrame Window expressions and withColumn and not to change partition?
how can I keep partition'number not change when I use window.partitionBy() function with spark/scala?
scala - Spark parquet writer insists on writing as BigDecimal regardless of internal and external schema and cast - Stack Overflow
How does slick profile work with respect to slick DB
Why does Kotlin compile faster than Scala?
What is the advantage of using abstract classes instead of traits?