How to filter array of objects swift 4 then remove after

Question

I want to avoid getting this error image of error

which is INDEX out of range. Im trying to loop through an array but when I find something I want to remove , I delete it yet the .count of the array remains the same for that iteration of the for loop , how can I fix this?

here is console when run

test i:0  count: 3
test i:1  count: 3
test i:2  count: 2

yet the to: in

    for i in stride(from: 0, to: count, by: 1)

still seems to be 3...

Can Someone show me how to filter this array or loop through and remove? as long as it works i dont care what it is

Iterate in reverse to avoid this problem. Or filter the array instead of using a for loop. — rmaddy
– rmaddy, Commented May 1, 2018 at 16:08
Use filter: stackoverflow.com/q/35101099/1187415, stackoverflow.com/q/28323848/1187415 — Martin R
– Martin R, Commented May 1, 2018 at 16:08
@rmaddy how can I filter my array to get out all the objects that have a .isSquadPlaylist = true — Zack117
– Zack117, Commented May 1, 2018 at 16:15
Update your question with relevant code fully demonstrating your issue. — rmaddy
– rmaddy, Commented May 1, 2018 at 16:18
@Zack The expression in the right side of a for loop is evaluated only once, prior to the first iteration. Your expression stride(from: 0, to: count, by: 1) will be evaluated to produce a StrideTo instance (which is a kind of Sequence). Further changes to count won't effect the for loop, because it's iterating this existing sequence. — Alexander
– Alexander, Commented May 1, 2018 at 18:15

Lucas van Dongen · Accepted Answer · 2018-05-01 16:30:43Z

1

Use filter:

let filteredImages = images.filter { $0.someproperty == whatYouWant }

Mutating for-loops are something you want to avoid. Filtering is much safer.

answered May 1, 2018 at 16:30

Lucas van Dongen

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1 Comment

koen Over a year ago

See also the answer by @Krunal here: stackoverflow.com/questions/39974838/…

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