What's the difference between [String] and [(String)]?
2 answers
[String] is an array of strings and [(String)] is an array of tuples containing 1 string.
let arr1 = [("test")]
arr1[0].0 // contains "test"
let arr2 = ["test"]
arr2[0] // contains "test"
A more useful array of tuples might be something like this:
let arr1: [(id: Int, name: String)] = [(12, "Fred"), (43, "Bob")]
arr1[0].name // contains "Fred"
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There shouldn't be a difference - it's a glitch somewhere in Xcode or Swift if you see [(String)]
. In theory, all variables are singleton tuples - so every variable has a property .0
:
let s = "hello"
print(s.0)
but in practice this should be normalized so that you never see (OneThing)
, only ever OneThing
.
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