Unwrap value and verify it's content on the same line with swift

Question

pushIsActivated is an optional bool variable. I use this code to check it's value

if let pushOn = pushIsActivated {
    if pushOn {
        // Do some stuff...
    }
}

is it possible to do something like

if let pushOn = pushIsActivated, pushOn {
    // Do some stuff ...
}

Or

if let pushOn = pushIsActivated && pushOn {
    // Do some stuff ...
}

Yes, exactly as you wrote it in the second code block (Swift 3)... Did you try it? — Martin R, Nov 28 '16 at 14:16
@vadian: It could be the result of a dictionary lookup or optional chaining. — Martin R, Nov 28 '16 at 14:20
Related: [Evaluate Bool property of optional object in if statement](http://stackoverflow.com/questions/26910229/evaluate-bool-property-of-optional-object-in-if-statement) — Martin R, Nov 28 '16 at 14:22

score 2 · Answer 1 · answered Nov 28 '16 at 14:17

2

Sure! Check this simple example:

var testBool: Bool?
    testBool = true
    if let unwrappedTestBool = testBool, unwrappedTestBool {
        print("Success")
    }

answered Nov 28 '16 at 14:17

Artem Novichkov

score 2 · Answer 2 · answered Nov 28 '16 at 14:18

2

Yes, it is!

var aVal: Bool?

aVal = true
if let aVal = aVal, aVal {
    print(aVal)
}

answered Nov 28 '16 at 14:18

J. Koush

score 0 · Answer 3 · answered Nov 28 '16 at 14:16

0

Yes, you can check both the values in a single if condition like this

if let pushOn = pushIsActivated, let pushOn1 = anotherCondition {
// Do some stuff ...
}

answered Nov 28 '16 at 14:16

Rajat

score 0 · Accepted Answer · answered Nov 28 '16 at 14:18

0

The line should be:

if let pushOn = pushIsActivated where pushOn {

}

answered Nov 28 '16 at 14:18

aramusss

You''re using deprecated Swift 2 syntax, while the question gives an example with a newer Swift 3 syntax. – Cœur Nov 28 '16 at 16:42
1

I am using swift 2 and not 3, the syntax in the question was not working for me that's why I asked it. This syntax is working perfectly for me. – user567 Nov 30 '16 at 16:51

score -2 · Answer 5 · answered Nov 28 '16 at 14:22

-2

I usually compare to true in these cases

if pushIsActive == true {
    // Run when pushIsActive is true
} else {
    // Run when pushIsActive is nil or false
}

answered Nov 28 '16 at 14:22

Key

It would be nice to get comments on why this is being down voted. This will give the exact result at the accepted answer, but with less code. – Key Dec 01 '16 at 07:04

5 Answers5