it works well!

Array Like Perl in Swift

class ArrayLikePerl {
    var value: [Any] = []

    init(_ array :[Any] = []){
        value = array
    }

    func count()->Int {
        return self.value.count
    }
    
    func pop() -> Any? {
        if self.count() == 0 { return nil }
        let removed: Any? = self.value.removeAtIndex(self.value.endIndex.predecessor())
        return removed
    }
    
    func push(value: Any?...) -> Any? {
        for v in value {
            self.value.insert(v, atIndex: self.value.endIndex)
        }
        return value
    }
    
    func shift() -> Any? {
        if self.count() == 0 { return nil }
        let removed: Any? = self.value.removeAtIndex(self.value.startIndex)
        return removed
    }
    
    func unshift(value: Any?...) -> Any? {
        for v in value.reverse() {
            self.value.insert(v, atIndex: self.value.startIndex)
        }
        return value
    }
}