根据快速的嵌套数组元素搜索显示主数组结果 [英] Show master array results, based on nested array element search in swift

问题描述

我有一组示例数据

public var myResults : [Section] =[:]

public var sectionsData: [Section] = [
     Section(name: "Mac", items: [
        Item(name: "MacBook", detail: "Apple's ultraportable laptop, trading portability for speed and connectivity."),
        Item(name: "MacBook Air", detail: "While the screen could be sharper, the updated 11-inch MacBook Air is a very light ultraportable that offers great performance and battery life for the price."),
        Item(name: "MacBook Pro", detail: "Retina Display The brightest, most colorful Mac notebook display ever. The display in the MacBook Pro is the best ever in a Mac notebook."),

        Item(name: "iMac", detail: "iMac combines enhanced performance with our best ever Retina display for the ultimate desktop experience in two sizes."),

        Item(name: "Mac Pro", detail: "Mac Pro is equipped with pro-level graphics, storage, expansion, processing power, and memory. It's built for creativity on an epic scale."),

        Item(name: "Mac mini", detail: "Mac mini is an affordable powerhouse that packs the entire Mac experience into a 7.7-inch-square frame."),
       Item(name: "OS X El Capitan", detail: "The twelfth major release of OS X (now named macOS)."),

      Item(name: "Accessories", detail: "")
        ],collapsed: false),

Section(name: "iPad",
 items: [
        Item(name: "iPad Pro", detail: "iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size."),

        Item(name: "iPad Air 2", detail: "The second-generation iPad Air tablet computer designed, developed, and marketed by Apple Inc."),
        Item(name: "iPad mini 4", detail: "iPad mini 4 puts uncompromising performance and potential in your hand."),

        Item(name: "Accessories", detail: "")
        ] ,collapsed: false),


Section(name: "iPhone", items: [
        Item(name: "iPhone 6s", detail: "The iPhone 6S has a similar design to the 6 but updated hardware, including a strengthened chassis and upgraded system-on-chip, a 12-megapixel camera, improved fingerprint recognition sensor, and LTE Advanced support."),

        Item(name: "iPhone 6", detail: "The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc."),

        Item(name: "iPhone SE", detail: "The iPhone SE was received positively by critics, who noted its familiar form factor and design, improved hardware over previous 4-inch iPhone models, as well as its overall performance and battery life."),

        Item(name: "Accessories", detail: "")
        ],collapsed: false)
]

如果我基于Item数组内的明细值进行搜索，例如明细包含"iPhone"如何获取主数组结果以及嵌套值

If I search based on detail value inside the Item array for example details contains 'The iPhone' how to get master array results along with nested values

我的结果应该是

myResults = Section(name: "iPhone", items: [
  Item(name: "iPhone 6s", detail: "The iPhone 6S has a similar design to the 6 but updated hardware, including a strengthened chassis and upgraded system-on-chip, a 12-megapixel camera, improved fingerprint recognition sensor, and LTE Advanced support."),
        Item(name: "iPhone 6", detail: "The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc."),
        Item(name: "iPhone SE", detail: "The iPhone SE was received positively by critics, who noted its familiar form factor and design, improved hardware over previous 4-inch iPhone models, as well as its overall performance and battery life.")
],collapsed: false)

推荐答案

这应该可以解决问题:

let text = "The iPhone"
let filteredSections = sectionsData.compactMap({ (aSection) -> Section? in
    let keptItems = aSection.items.filter({ $0.detail.contains(text) })
    if keptItems.isEmpty {
        return nil
    } else {
        return Section(name: aSection.name, items: keptItems, collapsed: aSection.collapsed)
    }
})

我们迭代sectionsData. 我们根据要搜索的文本过滤Section的项目. 如果没有任何项目，我们将其跳过(return nil). 否则，我们将创建一个新部分，保留该部分的其他值，但保留过滤后的项目.

We iterate sectionsData. We filters the items of a Section according to the text to search. If there are no items, we skip it (return nil). Else, we create a new section keeping the other values of the section but with the filtered items.

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