first-class-functions

I've been successfully passing no-argument functions around in PowerShell using ScriptBlocks. However, I can't get this to work if the function has arguments. Is there a way to do this in PowerShell? (v2 preferably) Function Add([int] $x, [int] $y) { return $x + $y } Function Apply([scriptblock] $s) { write-host ($s.Invoke(1,2)) } Then Apply { Add } writes 0 to the console. Apply does invoke Add , but doesn't pass any arguments in (i.e. uses the default [int] values of 0 and 0) Rob Ok, I found the answer here : I wanted ${function:Add} rather than { Add } in the call to Apply . There is a much

I checked out the latest Ruby version, to play a bit with the latest changes. The first thing I tried to do was call a Ruby lambda/block/proc just like you'd do with a Python callable. a = lambda {|x| puts x} a.call(4) # works, and prints 4 a[4] # works and prints 4 a.(4) # same a(4) # undefined method 'a' for main:Object Why isn't the last call possible? Will it ever be? AFAIK it's because ruby doesn't let you define the () method for an object. The reason it doesn't let you define the () method is probably due to the fact that parentheses are optional in method calls. And for what it's worth

More specifically what are the characteristics (if any) that delegates have that functions as first class values in F# don't have; and what are the characteristics that functions as first class values have (if any) that delegates in C# don't have? Delegates and F# "First class function values" are quite different. Delegates are a mechanism of the CLR, a type-safe wrapper around function-pointer+object pairs (for instance methods, the this -pointer gets captured together with the method address). F# function values on the other hand, are implementation of an abstract class FSharpFunc<,> (it

I am reading some books about the functional programming in swift. When I see some books said the function in swift is "first-class function" and I confused what is the meaning of the "first-class". Can anybody answer me or give me some example code? Functions are first-class citizens in Swift because you can treat a function like a normal value. For example, you can … assign a function to a local variable, pass a function as an argument to another function, and return a function from a function. Its just fancy terminology that is currently trendy. It just means that you can have a variable

I'm learning python and am trying to write a wound system based on hot zones of a character. Here's what I've written. Don't judge me too much. class Character: def __init__ (self, agility, strength, coordination): self.max_agility = 100 self.max_strength = 100 self.max_coordination = 100 self.agility = agility self.strength = strength self.coordination = coordination def hit (self, hit_region, wound): self.hit_region = hit_region self.wound = wound #Hit Zones l_arm=[] r_arm=[] l_leg=[] r_leg=[] hit_region_list = [l_arm , r_arm, l_leg, r_leg] #Wound Pretty Names healthy = "Healthy" skin_cut =