Comparing two arrays in swift and removing elements with specific fields that don't match

Question

I have two arrays:

var packages = [SAPackage]()
var inappProducts = [SKProduct]()

The SAPackage object in the packages array has a String var titled sku. TheSKProduct object in the inappProducts array has a String var titled productIdentifier. What I want to do is remove any object in the packages array that doesn't have a sku String that matches any objects productIdentifier String in the inappProducts array. Is there anyway to go about this? Thought about using sets to find an intersection however I cannot examine individual object fields doing this just whole objects. Any pointers on this would be greatly appreciated!

Answer 1

You can use this code to filter those packages whose "sku" exist in inappProducts, SKProducts,

let filteredPackages = packages.filter { package in
    return inappProducts.contains { product in
        product.productIdentifier == package.sku
    }
}