Swift - Array Filter not removing objects

Question

I have an Array of Strings as shown:

I also have an array of objects that contain:

When I run the following line:

let filterNo = self.responseObjs.filter({!formItemIds.contains(String(describing: $0.formItemId))})

I expect filterNo to be empty as all the formItemIds are contained in the array. It is however not removing any of the items. Am I missing something basic?

Nirav D · Accepted Answer · 2017-01-05 07:17:39Z

1

Remove the describing from the init of String and use Nil-Coalescing Operator with $0.formItemId to unwrapped optional.

let filterNo = self.responseObjs.filter({!formItemIds.contains(String($0.formItemId ?? 0))})

You are not getting filtered data because your formItemId property is optional and using String(describing: $0.formItemId) give you output like Optional(98)

edited Jan 5, 2017 at 7:17

answered Jan 5, 2017 at 6:56

Nirav D

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Nirav D Over a year ago

@Alan Welcome mate :)

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