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Jonathan Halbrook
3,853 PointsWhy is the challenge compiler rejecting my code when it compiles on playground?
On challenge task 3 of 4 for inserting and deleting values in Swift Collections and Flows the result of my code below was "Bummer! Your code could not be compiled." Preview gave this error message ( swift_lint.swift:11:12: error: expression resolves to an unused l-value arrayOfInts[4] ).
It compiles properly on Xcode so is there some type of bug in the challenge compiler or am I just not seeing my mistake?
Task 3 of 4 - We also learned about reading values from an array. Retrieve the 5th item (remember array indexes start at 0) and assign the result to a constant named value.)
My code - var arrayOfInts = [2, 4, 6, 8, 10, 12]
arrayOfInts.append(14)
arrayOfInts += [16]
arrayOfInts[4]
let value = arrayOfInts[4]
Thanks for your help!
2 Answers
Moritz Lang
25,909 PointsHi, the following code did work for me:
var arrayOfInts = [0, 34, 57, 54, 89, 456]
arrayOfInts.append(56)
arrayOfInts += [19]
let value = arrayOfInts[4]
// task 4
let discardedValue = arrayOfInts.remove(at: 5)
Your mistake has to be writing arrayOfInts[4] in one line as this isn't valid Swift code. You can use this however in Playgrounds to get immediate results. In a real Xcode project this would be wrong code and you'd get a compiler error.
Jonathan Halbrook
3,853 PointsThanks so much! After I took out the line "arrayOfInts[4]" everything worked.