implicit

A while back this was asked and answered on the Scala mailing list: Kevin: Given some nested structure: List[List[...List[T]]] what's the best (preferably type-safe) way to flatten it to a List[T] Jesper: A combination of implicits and default arguments works: case class Flat[T, U](fn : T => List[U]) implicit def recFlattenFn[T, U](implicit f : Flat[T, U] = Flat((l : T) => List(l))) = Flat((l : List[T]) => l.flatMap(f.fn)) def recFlatten[T, U](l : List[T])(implicit f : Flat[List[T], U]) = f.fn(l) Examples: scala> recFlatten(List(1, 2, 3)) res0: List[Int] = List(1, 2, 3) scala> recFlatten(List

I'm new to C# and learning new words. I find it difficult to understand what's the meaning of these two words when it comes to programming c#. I looked in the dictionary for the meaning and here's what I got: Implicit "Something that is implicit is expressed in an indirect way." "If a quality or element is implicit in something, it is involved in it or is shown by it;" Explicit "Something that is explicit is expressed or shown clearly and openly, without any attempt to hide anything" "If you are explicit about something, you speak about it very openly and clearly." I would like to understand

For example, how can I write an expression where the following is implicitly applied: implicit def intsToString(x: Int, y: Int) = "test" val s: String = ... //? Thanks Implicit functions of one argument are used to automatically convert values to an expected type. These are known as Implicit Views. With two arguments, it doesn't work or make sense. You could apply an implicit view to a TupleN : implicit def intsToString( xy: (Int, Int)) = "test" val s: String = (1, 2) You can also mark the final parameter list of any function as implicit. def intsToString(implicit x: Int, y: Int) = "test"

I am somewhat new to Ruby and although I find it to be a very intuitive language I am having some difficulty understanding how implicit return values behave. I am working on a small program to grep Tomcat logs and generate pipe-delimited CSV files from the pertinent data. Here is a simplified example that I'm using to generate the lines from a log entry. class LineMatcher class << self def match(line, regex) output = "" line.scan(regex).each do |matched| output << matched.join("|") << "\n" end return output end end end puts LineMatcher.match("00:00:13,207 06/18 INFO stateLogger -

Forgive me if this has already been asked elsewhere. I have a Scala syntax question involving function-values and implicit parameters. I'm comfortable using implicits with Scala's currying feature. For instance if I had a sum function and wanted to make the second argument an implicit: scala> def sum(a: Int)(implicit b: Int) = a + b sum: (a: Int)(implicit b: Int)Int Is there a way to do this using the function-value syntax? Ignoring the implicit for a moment, I typically write curried function-values like this: scala> val sum2 = (a: Int) => (b: Int) => a + b sum: (Int) => (Int) => Int =