filtering arrays using array contents

Question

i want to print the name in world array which belong to continent: "europe"

    struct countries{
    let name: String
    let continent: String
}

var world: [countries] = [
    countries(name:"japan", continent: "asia"),
    countries(name:"france", continent: "europe"),
    countries(name:"italy", continent: "europe"),
    countries(name:"egypt", continent: "africa")
]

Possible duplicate of How do i use array.filter to filter a class object based on a property? — Joakim Danielson
– Joakim Danielson, Commented May 17, 2019 at 12:28
Naming tips, start your class and struct names with an upper case letter and since each instance contains one country use singulars not plural in the name so countries -> Country — Joakim Danielson
– Joakim Danielson, Commented May 17, 2019 at 12:32

iDevid · Accepted Answer · 2019-05-17 15:12:46Z

1

world.filter { $0.continent == "europe" }.forEach { print($0.name) }

If you want an array of Names:

world.filter { $0.continent == "europe" }.map { $0.name }

edited May 17, 2019 at 15:12

answered May 17, 2019 at 12:29

iDevid

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4 Comments

unknown Over a year ago

what if i wanted the name to be returned as a string instead of printing it.

iDevid Over a year ago

Updated the Answer :)

unknown Over a year ago

is it possible to update the world array to include only the filtered items or create a new array of the same type with the filtered items

koen Over a year ago

let array = world.filter { ... } or: world = world.filter { ... }

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