FSHARP

CompGuy101 wrote:

What can F# do that I cannot do in VB / C#?

let shift (dx,dy) (px,py) = (px + dx, py + dy)

So functions are just like any other variable shift takes two parameters that are tuples what is right of = is the function definition.

Four functions that use Partial application:

let shiftRight = shift (1,0)

let shiftUp = shift (0,1)

let shiftLeft = shift (-1,0)

let shiftDown = shift (0,-1)

Basically calculating the first tuple parameter (dx,dy) of shift  then calling it via another function and providing the second tuple it at a later time when shift_________ is called.

Low noise branching (called Pattern matching '_' is wild card though you have if and else and ifel):

let urlFilter url agent =

match (url,agent) with

| "http://www.control.org", 99 -> true

| "http://www.kaos.org" , _ -> false

| _, 86 -> true

| _ -> false

You would have to nest switches or make messy if else soup to do that in C#/vb

The f# compile throws warning when a previous pattern would be used thus some pattern is unreachable which is useful.

Again I recommend reading Expert F# as it is very well written read it in like a week. Saying it is anything like C# and VB.NET is well saying Javascript is fairly close to Java. I will be writing more on my blog for sure. Now will I be using it for all new development probably not but it has many advantages over C# and is something to watch like Ruby.