Use of local in statements

Monkey Forums/Monkey Programming/Use of local in statements

Shagwana

(Posted 2015) [#1]

I cant help but think that the following should be valid but alas is not...

Select local iChar:int = GetChar()
	Default
	Print iChar
End Select

The scope of iChar would be to that of the select statement only.

tiresius

(Posted 2015) [#2]

Can you do that within an IF () ?

nullterm

(Posted 2015) [#3]

"Can you do that within an IF () ?"

.

If you could, reminds me alot of Swift, and is one of the cooler parts of the language once you get your head wrapped around optionals and unwrapping...

var variableOptional: String? = "Test" 
if let s = variableOptional {
    println( "s is " + s )
} else {
    println( "s doesn't exist" )
}

It becomes helpful for casting...

if let m = thing as? Monster {
    println( "thing is a monster!" )
    m.attack()
} else {
    println( "thing is not a monster" )
}

.

It may seem trivial, but once you start coding more and more in Swift then your code gets ALOT simpler/cleaner. ObjC iOS code can get pretty lengthy for one statement.

controller.navigationController?.hidesBarsOnSwipe = true
controller.navigationController?.hidesBarsOnTap = true
controller.navigationController?.navigationBarHidden = false
controller.navigationController?.popToRootViewControllerAnimated(true)

... becomes...

if let n = controller.navigationController {
  n.hidesBarsOnSwipe = true
  n.hidesBarsOnTap = true
  n.navigationBarHidden = false
  n.popToRootViewControllerAnimated(true)
}

Not to mention, the fact it's wrapped by a "if let" means it's safer, in case it doesn't exist or it's a different type.

.

So, if you could, something like this in Monkey X land...

if local m:Monster = Monster( thing )
    print "m is a monster!"
    m.attack
else
    print "m is not a monster"
end