【メモ】配列に指定した要素からindexとその要素を返す機能を追加してみた【Swift】

import Foundation

extension Array {
    func findAll(includeElement: Element -> Bool) -> [(Int, Element)] {
        let seq = zip(0..<self.count, self)
        return seq.filter() { includeElement($0.1) }
    }
}

var array = ["おこめ","ごはん","ごはん","はくまい"]
var searchArray = array.findAll({$0 as! String == "ごはん"})
print(searchArray)

extension Array {
    func findIndex(includeElement: Element -> Bool) -> [Int] {
        var indexArray:[Int] = []
        for (index, element) in enumerate() {
            if includeElement(element) {
                indexArray.append(index)
            }
        }
        return indexArray
    }
}

var array = ["おこめ","ごはん","ごはん","はくまい"]
let searchIndex = array.findIndex({$0 as! String == "ごはん"})
print(searchIndex)