function

I just ran across this post about using tuples in an anonymous function, and thought it was good enough to reproduce here, with only the solution part.

In essence, the question is, if I have a Map like this, which is actually composed of tuples:

scala> val x = Map(1 -> "foo", 2 -> "bar")
x: scala.collection.immutable.Map[Int,String] = Map(1 -> foo, 2 -> bar)

how do I use each value in the tuples in an anonymous function?

When you want to create a Play Framework template function, you can find some examples on the Scala Templates page. There you'll find these two examples.

First, assuming you have a Product model defined something like this:

case class Product(var name: String, var price: BigDecimal)

The first template looks like this:

UPDATE: This example shows how to create an implicit method in Scala 2.9 or older. You can use a slightly simpler approach with Scala 2.10 and newer, which I've documented in this Scala 2.10 implicit class example.

I'm not going to do much writing here today, but instead I'll just demonstrate how an implicit method argument works with implicit fields in Scala. Without any further ado, here's some code:

The Scala List class filter method implicitly loops over the List you supply, tests each element of the List with the function you supply. Your function must return true or false, and filter returns the list elements where your function returns true.

(Note: Even though I use a List in these examples, the filter method can be used on any Scala sequence, including Array, List, Vector, Seq, etc.)

As quick post here today, if you need a Scala REST client function, the following source code should be able to work for you, or at least be a good starting point. I'm using it in several applications today, and the only thing I think it needs is the ability to set a connection timeout and socket timeout, and I share the code for that down below.

Here's my Scala REST 'get content' client function, using the Apache HttpClient library: