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iOS Swift Basics (retired) Collections Modifying an Array

Ling Cheng
Ling Cheng
3,168 Points

what happen?

Am I doing anything wrong? I could get the result on Xcode but not here, it says my 'todo' variable has the wrong value in it

arrays.swift
var todo = ["Learn Swift", "Build App", "Deploy App"]
todo.append("Debug App")
todo.append("Fix Bugs")
todo.removeLast()
let item = todo.removeAtIndex(2)
todo.insert("Learn IOS", atIndex:1)

1 Answer

William Li
PLUS
William Li
Courses Plus Student 26,868 Points

Hi, Ling

Looks like there's one extra line there in your code

todo.removeLast()

Remove it and things should be good to go. It's important that when copying the codes over from Xcode, DO NOT copy all the lines over all at once!! That'd guarantee to fail because the list elements mismatch; only copy over the lines necessary to get pass each part of the challenge.

Also, I'd like to point out is that when you're testing the code on Xcode in your local machine, it may run fine without generating any errors, but that doesn't mean it'd pass the Code Challenge's check, the grader can be very strict sometimes, the code may fail the grader unless it does exactly what the Challenge asks.

Ling Cheng
Ling Cheng
3,168 Points

Got it, thanks very much!!

William Li
William Li
Courses Plus Student 26,868 Points

no problem, let me know if you have further questions.