Is there a way to remove an element at a specific index from an array?

[fervent otter]

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[earnest briar]

Arrays are fixed size, so you can’t “remove” elements from them. If you have to remove an element, you have to create a new array that is one element smaller than the previous array, and shift all the elements after the deleted one to the left by 1.
So given [1,2,3,4,5], if we want to remove 3, we must create a new array of length 4, and shift 4 and 5 to the left by one, so we get [1,2,4,5]

[rocky cosmos]

i see, so lets say i dont know what the size of the final array is

do i create an array with a length of 100 aka oversized array?

[earnest briar]

More expensive of an operation but you could also convert to/from lists and arrays

[rocky cosmos]

i thought there arent lists in java

[earnest briar]

Well I wouldn’t make an oversized array, your new array will either be the same size or smaller as this previous array

[rocky cosmos]

oh right

[earnest briar]

There are lists, they are like array but a dynamic size, so you can remove items etc. most common list is an ArrayList

[rocky cosmos]

i havent learned that yet so i dont think we are allowed to use it

[earnest briar]

Since it’s a 2D list, you could do it row by row, maybe go through the row, keep track of the indices that need to be removed, then create a new array with those indices gone, and make that the new row

[rocky cosmos]

hm okay let me try that