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iOS Swift Basics (retired) Collections Modifying an Array

Patricia Duffy
Patricia Duffy
511 Points
Posted by Patricia Duffy
Patricia Duffy
511 Points

Challenge Task 2 ofModifying Array - Why is this wrong: todo.removeAtIndex(2) let item = todo.removeAtIndex(2)

What is the correct answer?

arrays.swift 
var todo = ["Learn Swift", "Build App", "Deploy App"]
todo.append ("Debug App")
todo.append ("Fix Bugs")

todo.removeAtIndex(2)
let item = todo.removeAtIndex(2)
Matthew Panton
Matthew Panton
15,228 Points
Matthew Panton
Matthew Panton
15,228 Points

Is there any reason you are removing two items from the array? try removing the first 'todo.removeAtIndex(2)'

2 Answers

Patricia Duffy
Patricia Duffy
511 Points
Patricia Duffy
Patricia Duffy
511 Points

Thanks for responding. I finally got through the challenge by switching the two lines: 4 let item = todo.removeAtIndex(2) 5 todo.removeAtIndex(2) I don't know why I had to reverse the order. Could you clarify your response. I thought that when I wrote todo.removeAtIndex(2), I was removing item in position 3, and then assigning it a constant. Does assigning it a constant also automatically remove it to? (ie that's why I should delete "todo.removeAtIndex(2)

Matthew Panton
Matthew Panton
15,228 Points
Matthew Panton
Matthew Panton
15,228 Points

Yes, when you write "let item = todo.removeAtIndex(2)", this removes the item from the array and assigns it to a constant all in one. To just get the third item without removing it you would write "let item = todo[2]" Hope this helps :)

Patricia Duffy
Patricia Duffy
511 Points
Patricia Duffy
Patricia Duffy
511 Points

Thanks so much...this does help a lot!!!