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import Foundation
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Type inference FTW.
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var strings = ["a", "b", "c"]
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Declare the type of contained elements.
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var strings2: [String] = ["d", "e", "f"]
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Declare an empty array.
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var strings3 = [String]()
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Fill an array.
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var strings4 = [String](count: 3, repeatedValue: "hey")
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Arrays must contain values of a single type.
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Appending.
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strings += ["d"]
strings.append("e")
strings += ["f", "g"]
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Joining.
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strings3 = strings + strings2
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Checking length.
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print(strings.count) // 7
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# Accessing elements
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print(strings[0]) // a
print(strings.first!) // a
print(strings[strings.endIndex - 1]) // g
print(strings.last!) // g
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# Assigning elements
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strings[0] = "a"
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# Slices
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strings[0..<1] = ["a"] // Exclusive (basically the same as the prev assignment)
strings[0...1] = ["a", "b"] // Inclusive
strings[0...3] // ["a", "b", "c", "d"]
strings[0..<strings.endIndex] // ["a", "b", "c", "d", "e", "f", "g"]
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# Methods
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if strings.isEmpty {
print("empty")
} else {
print("populated") // populated
}
strings.insert("a", atIndex: 0) // Insert, not replace
print(strings.removeAtIndex(0)) // a
strings.map({
(str: String) -> String in
return str + "0"
}) // ["a0", "b0", "c0", "d0", "e0", "f0", "g0"]
strings.removeLast()
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# Clearing
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strings.removeAll(keepCapacity: false)
strings = []
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# Using a loop to create a multidimensional array
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var rows = 10, cols = 10
var dimensional = Array<Array<Int>>()
for col in 0..<10 {
dimensional.append(Array(count: rows, repeatedValue:Int()))
}
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