What is a slice in Swift?

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What is a slice in Swift and how does it differ from an array?

From the documentation, the type signature of subscript(Range) is:

subscript(Range<Int>) -> Slice<T>

Why not return another Array<T> rather than a Slice<T>?

It looks like I can concatenate a slice with an array:

var list = ["hello", "world"]
var slice: Array<String> = [] + list[0..list.count]

But this yields the error could not find an overload for 'subscript' that accepts the supplied arguments:

var list = ["hello", "world"]
var slice: Array<String> = list[0..list.count]

What is a slice?

asked 21 secs ago

hjing

1,258