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iOS Swift Collections and Control Flow Introduction to Collections Working With Arrays

Christiaan van Bastelaar
Christiaan van Bastelaar
10,063 Points
Posted by Christiaan van Bastelaar
Christiaan van Bastelaar
10,063 Points

concatenating

I can't seem to figure out what I am doing from here when concatenating the Array. Or is concatenating something else then using 'append'? Any help?

array.swift 
// Enter your code below
var arrayOfInts = [1,2,3,4,5,6]
arrayOfInts.append(7)
arrayOfInts.append(8)
arrayOfInts

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

Concatenating is indeed different from using append. Concatenation is when you add two things together using the + operator. In swift two arrays can be concatenated together like this:

arrayOfInts = arrayOfInts + [8] // This adds 8 to the arrayOfInts array.
arrayOfInts += [8] // This is shorthand that performs the same operation as above

Both of the lines above show examples of concatenation a value to an array, the second line shows a shorter way of doing it but they are both valid techniques.