Dapeng Gao dpgao

## pyramid-of-doom-1.swift
infix operator !=> { associativity left precedence 125 }

func !=><T>(lhs: T?, @noescape rhs: () -> Void) -> T? {
    if let lhs = lhs { return lhs }
    rhs()
    return nil
}

## ImageDownloader.swift
final class ImageDownloader {

    typealias CompletionHandler = (UIImage?) -> Void

    private struct ResponseHandler {
        let dataTask: URLSessionDataTask
        var completionHandlers: [CompletionHandler]
    }

    private let lock = NSLock()

## keybase.md

      
        
          
            
              
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                dpgao
                / keybase.md
            
            
              Created
              May 23, 2018 11:22
            
          
        
      
        
  
      
    Keybase proof

I hereby claim:

I am dpgao on github.
I am dpgao (https://keybase.io/dpgao) on keybase.
I have a public key whose fingerprint is 57D4 23CE 922E 0B6E B380  34A5 EE48 8EDD A59E 1E88

To claim this, I am signing this object:
	infix operator !=> { associativity left precedence 125 }

	func !=><T>(lhs: T?, @noescape rhs: () -> Void) -> T? {
	if let lhs = lhs { return lhs }
	rhs()
	return nil
	}
	final class ImageDownloader {

	typealias CompletionHandler = (UIImage?) -> Void

	private struct ResponseHandler {
	let dataTask: URLSessionDataTask
	var completionHandlers: [CompletionHandler]
	}

	private let lock = NSLock()