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yojkim/safe-way-to-access-array-3.swift

Last active January 1, 2021 16:07
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safe-way-to-access-array-3.swift
let arr = ["a", "aa", "aaa", "aaaa", "aaaaa", "aaaaaa"]
func getElementCount(_ index: Int) -> Int {
guard let value = arr[safe: index] else { return 0 }
return value.count
}
(-5..<10).forEach {
print("\($0) : \(getElementCount($0))")
}
/*
[RESULT]
-2 : 0
-1 : 0
0 : 1
1 : 2
2 : 3
3 : 4
4 : 5
5 : 6
6 : 0
7 : 0
*/
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