Parallel extensions for Swift

Parallel.swift

//
//  Parallel.swift
//

import Dispatch

extension DispatchQueue {
    
    public func parallel(_ blocks: Array<() -> Void>) {
        
        self.parallel(blocks.map { (block) in DispatchWorkItem(block: block) })
    }
    
    public func parallel(_ blocks: Array<DispatchWorkItem>) {
        
        let group = DispatchGroup()
        
        blocks.forEach { [weak self, weak group] (block) in
            
            guard let group = group else {
                
                return
            }
            
            self?.async(group: group, execute: block)
        }
        
        _ = group.wait(timeout: .distantFuture)
    }
}