Swift Define Array with more than one Integer Range one liner

Question

I have an Array which I have defined

  var array: [Int] = Array(1...24)

I then add

   array.insert(9999, atIndex: 0)

I would like to do something like

  var array: [Int] = Array(9999...9999,1...24)

Is this possible ?

What exactly do you mean via `9999...9999`? From 9999 to 9999 there is only 9999, so the result of your code is `[9999, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]` what is same as this what you want (as far as I understand the question). — Nat, Mar 01 '16 at 08:29
You can simply concatenate arrays, e.g. `Array(100 ... 110) + Array(1 ... 24)`, if that is what you are looking for. — Martin R, Mar 01 '16 at 08:35
Possible duplicate of http://stackoverflow.com/questions/25146382/how-do-i-concatenate-or-merge-arrays-in-swift. — Martin R, Mar 01 '16 at 08:44
@MartinR , Do not see why it is a duplicate :" How do I concatenate or merge arrays in Swift" — Ryan Heitner, Mar 01 '16 at 10:37
@RyanHeitner Oh man that's hilarious! btw, I didn't down vote your question. — hola, Mar 01 '16 at 11:48
Sorry I thought it was you you gave the comment, above and then I saw I was downvoted put 1 and 1 together and got 3 — Ryan Heitner, Mar 01 '16 at 11:53

Martin R · Answer 1 · 2016-03-01T09:11:42.573

2

You could simply concatenate the arrays created from each range:

let array = Array(10 ... 14) + Array(1 ... 24)

Alternatively:

let array = [10 ... 14, 1 ... 4].flatMap { $0 }

which has the small advantage of not creating intermediate arrays (as you can see in the open source implementation https://github.com/apple/swift/blob/master/stdlib/public/core/SequenceAlgorithms.swift.gyb).

edited Mar 01 '16 at 09:11

answered Mar 01 '16 at 09:00

Martin R

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score 1 · Answer 2 · answered Mar 01 '16 at 08:30

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For an array of ranges you define the array as

let array: [Range<Int>] = [0...1, 5...100]

and so on and so forth.

answered Mar 01 '16 at 08:30

hola

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@dfri Post that as an answer! – hola Mar 01 '16 at 08:49

score 1 · Accepted Answer · edited May 23 '17 at 11:59

As MartinR mentioned, you could simply concenate arrays using the + operator; and if this method is an answer for you, than this thread is a duplicate (see MartinR:s link), and should be closed.

If you explicitly wants to initialize an Int array using several ranges at once (see e.g. hola:s answer regarding array of ranges), you can make use of reduce as follows

let arr = [1...5, 11...15].reduce([]) { $0.0 + Array($0.1) }

Or, alternatively, flatten

var arr = Array([1...5, 11...15].flatten())

Both the above yields the following result

print(arr.dynamicType) // Array<Int>
print(arr)             // [1, 2, 3, 4, 5, 11, 12, 13, 14, 15]

Swift Define Array with more than one Integer Range one liner

3 Answers3