How to copy end of the Array in swift?

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And another one …

let array = [1, 2, 3, 4, 5]
let fromIndex = 2
let endOfArray = array.dropFirst(fromIndex)
print(endOfArray) // [3, 4, 5]

This gives an ArraySlice which should be good enough for most
purposes. If you need a real Array, use 

let endOfArray = Array(array.dropFirst(fromIndex))

An empty array/slice is created if the start index is larger than (or equal to) the element count.

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