For example, I have array let candidates=["1","0","a","b","c"]
, and I want to return ["a","b","c"]
Here's the code:
if let head = candidates.firstIndex(of: "0") {
return candidates[head..<candidates.count]
}
But got error: No 'subscript' candidates produce the expected contextual result type '[String]'
Does your function expect to return type [String]
?
candidates[head..<candidates.count]
will return type ArraySlice
so if you want to convert that to an array
, you might need to do
return Array(candidates[head..<candidates.count])
One more small addition for completeness, since you want to return ["a","b","c"]
, you will need to start from the index after "0" so I would do:
return Array(candidates[head+1..<candidates.count])
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