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yusuf Dibswazit
1,522 Pointswhat is wrong here
Challenge Task 4 of 4
Great job so far! Clearly you know how to add and read items from the array so in this challenge let's try getting rid of a value.
For this task, remove the 6th item from the array and assign the result to a constant named discardedValue.
To remove an item, use the method removeAtIndex() and put the index number in between parentheses that you want to remove.
var arrayOfInts = [1,2,3,4,5,6] arrayOfInts.append(55) arrayOfInts += [67] let value = arrayOfInts[4] let discardedValue = arrayOfInts[55] discardedValue.removeAtIndex(55)
as of Challenge 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.
when i pass this code: var arrayOfInts = [1,2,3,4,5,6] arrayOfInts.append(55) arrayOfInts += [67] let value = arrayOfInts[6] ITS WRONG ! BUT when i pass this code its becomes right : var arrayOfInts = [1,2,3,4,5,6] arrayOfInts.append(55) arrayOfInts += [67] let value = arrayOfInts[4]
how its the number 4 the 5th item, when it CLEARLY states that the indexes start with 0. so to my mind the number 6 should be the 5th item ! correct ??
also why is it when im writing a question its all stacked up neatly, but when its posted, its all in lines with No individual lines for every ENTER key i assign it to. ugggggru this is so time consuming and frustrating.
5 Answers
Marina Alenskaja
9,320 PointsHey :-)
So, let's look at this together, step by step. The challenge says to retrieve the 5th value in the array and assign it to a constant named "value". Here are the index numbers for our 6 items and below the actual numbers for the items:
0 1 2 3 4 5
1 2 3 4 5 6
As you can see, the fifth item in the array corresponds with the index number 4.
I hope this helps you.
Alan Chen
64 PointsFor challenge task 4 of 4, you should keep in mind:
- To use the method removeAtIndex(), you need to put a dot after the array name, followed by the method name
- To remove the 6th item from the array, you need to put the index number 5 in between the parentheses
Putting these together, you will get:
let discardedValue = arrayOfInts.removeAtIndex(5)
Hope this clears it up!
Joshua Hardy
17,317 Pointslet discardedValue = arrayOfInts.remove(at: 5)
That's the correct answer. Just worked for me.
Alan Chen
64 PointsIf I understand you correctly, you're asking for clarifications on the array indexing.
- array[0] is the 1st item
- array[1] is the 2nd item
- ...
- array[n] is the (n+1)th item
So, when you use arrayOfInts[6], you are asking for the 7th item.
Hope this helps!
Kellington Chidza
866 Pointslet discardedValue = arrayOfInts.remove(at: 5)
yusuf Dibswazit
1,522 Pointsyusuf Dibswazit
1,522 Pointshi, thank you very much, do you know what im doing wrong in task 4 of 4 ??