Check if optional array contains element and display view - arrays

Question

In SwiftUI, I'm fetching objects via API into an optional array. In a view, I'm then trying to determine if that array contains a set of possible elements when the view is loaded.
If the array contains that element, I'll show a separate view for it. If it doesn't I won't show it.
How do I check if that optional array contains a specific element?
So for example, I want to check if projectType.landscapes? contains a "mulching" entry. Also, the ProjectType.Landscapes.types array will contain string values that correspond to the present projectType.landscape options, for example, ["mulching", "clearing", "treeCare"] or simply ["mulching"].
Here's my data structure:
// MARK: - ProjectType
struct ProjectType: Codable {
let landscapes: [Landscape]?
let generalConstructions: [GeneralConstruction]?
}
// MARK: - GeneralConstruction
struct GeneralConstruction: Codable {
let id: Int
}
// MARK: - Landscape
struct Landscape: Codable {
let id: Int
let types: [String]
let mulching: Mulching?
let clearing: Clearing?
let planting: Planting?
let treeCare: TreeCare?
let other: Other?
}
// MARK: - Clearing
struct Clearing: Codable {
let id: Int
let clearingArea, removeTrees, treeCount, approxTreeHeight: String
let treeStumps: String
}
// MARK: - Mulching
struct Mulching: Codable {
let id: Int
let mulchingType, currentlyInPlace, currentlyInPlaceCustom, roomLength: String
let roomWidth, color, customColor, length: String
let approximateLength: String
}
// MARK: - Other
struct Other: Codable {
let id: Int
let otherDetails: String
}
// MARK: - Planting
struct Planting: Codable {
let id: Int
let designPlan, treeLargerThanFiveFeet, plantCount: String
}
// MARK: - TreeCare
struct TreeCare: Codable {
let id: Int
let careDescription: String
}
Here's where I'd check to see if the landscape types are present:
import SwiftUI
struct LandscapeSpecificsView: View {
let projectType: ProjectType
var body: some View {
VStack{
Text("Here is the landscape specific project info. I'll show mulching or clearing, or treeCare, etc.")
}
}
}
struct MulchingView: View {
var body: some View {
Text("Here is the mulching info")
}
}
struct ClearingView: View {
var body: some View {
Text("Here is the clearing info")
}
}
struct PlantingView: View {
var body: some View {
Text("Here is the planting info")
}
}
struct TreeCareView: View {
var body: some View {
Text("Here is the treecare info")
}
}
struct LandscapeOtherView: View {
var body: some View {
Text("Here is the landscape other info")
}
}

Answer 1

first, you can use 'optional binding' methods like ' if let' or 'guard let' or simply using array count to make sure your array has a value.
after that you can use several options on Array like 'contains(_:)'
apple document
if let landScapes = project.landscapes {
if landScapes.contains(where: {$0.mulching != nil}) {
}
}