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What is an optional value in Swift?
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var serialNumber:String? = Optional.none
serialNumber = Optional.some("1234")
print("\(serialNumber.debugDescription)")
Setting an optional to nil
You can create an optional with no initial value, or create one with the initial value of nil (both have the same outcome).
var name: String?
var name...
How can you find out which process is listening on a port on Windows?
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edited Jul 14 at 16:05
Alex KeySmith
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How to map atan2() to degrees 0-360
...enerikkallen
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Is well formed without a ?
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<input> without a <form> appears valid, yes (at least for html 4.01, look near the e...
Java: How to set Precision for double value? [duplicate]
...ion where I want to set the precision of a double value say to 6 digits or 4 digits, depending on the value stored in the database.
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How to retry after exception?
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edited May 2 '14 at 17:03
answered Jan 18 '10 at 5:02
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Make: how to continue after a command fails?
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Samuel Harmer
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answered Apr 19 '10 at 19:22
Eli BenderskyEli Bend...
In-App Billing test: android.test.purchased already owned
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Aashutosh SharmaAashutosh Sharma
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How do you redirect HTTPS to HTTP?
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edited Jul 4 '11 at 14:58
Gili
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Delete duplicate records in SQL Server?
... GibbJohn Gibb
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