Threw this together real quick. I'll refactor for more performant code and structure. Performance profiling coming soon.

zipmap.swift

import Foundation

extension Array {
    
    func zipmap(key key: String, value: String, container: [AnyObject]) -> [[String:AnyObject]] {
        var result = [[String:AnyObject]]()
        let count = min(self.count, container.count)
        for i in 0..<count {
            var mapping = [String:AnyObject]()
            let k = self[i] as! String
            let v = container[i]
            mapping[key] = k
            mapping[value] = v
            result.append(mapping)
        }
        return result
    }
}

let students = ["Joe", "Charlie", "Benjamin", "Peyton", "Alicia"]
let grades = [91, 82, 97, 99, 100]

let map = students.zipmap(key: "name", value: "grade", container: grades)