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Samar Khanna
1,757 PointsUnderstanding nil
So let me get this right. If i pass nil value as the condition in the if statement, the if statement recognises the condition as the BOOL value false?
Caleb Kleveter
Treehouse Moderator 37,862 PointsI'm not really sure, I don't know Swift yet, but it's on the list.
1 Answer
Caleb Kleveter
Treehouse Moderator 37,862 PointsNot quite, nil is when something is equal to nothing, look at the code below:
if text == nil
NSLog(@"Return is nil")
text in the code above has nothing in it, ie. no content; the BOOL (Boolean) value of false means something is not true, like if I said text had a length of 100. Sorry if this doesn't make sense, it's hard to explain
Samar Khanna
1,757 PointsSamar Khanna
1,757 PointsAlso take this code: '''
func findApt (aptNumber : String) -> String? { let aptNumbers = ["101","202","303","404"] for tempAptNumber in aptNumbers { if ( tempAptNumber == aptNumber) { return aptNumber } } return nil }
if let culprit = findApt("202") { println("Apt found: (culprit)") }
let iAmGettingBugged = findApt("101") println(iAmGettingBugged) '''
Now in my console output, I am getting : "Apt found: 202" for my if statement, but "Optional("101")" for the ''' println(iAmGettingBugged) ''' code.
Why am i not getting the Optional("202") for the earlier IF statement?