Swift: 'var' declaration without getter/setter method not allowed here

Question

I\'ve tried to declare IBOutlet property on extension of class. But it give error as

\'var\' declaration without getter/setter method not al

Answer 1

From Extensions -> Computed Properties in The Swift Programming Language

NOTE

Extensions can add new computed properties, but they cannot add stored properties, or add property observers to existing properties.

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Addition in response to twlkyao's comment: Here is my implementation of the absoluteValue property of a Double

extension Double {
    var absoluteValue: Double {
        if self >= 0 {
            return self
        } else {
            return -self
        }
    }
}

// Simple test -> BOTH println() should get called.
var a = -10.0
if (a < 0) {
    println("Smaller than Zero")
}
if (a.absoluteValue > 5) {
    println("Absolute is > 5")
}