hisui · April 11, 2016 12:17
diff --git a/a.swift b/a.swift
 let a = [["a","b"],["x","y"]]
 let b = a.enumerate().flatMap { (i, a) in a.enumerate().map { (i, $0.0, $0.1) } }
 b.forEach { (i, j, e) in
    print("a[\(i)][\(j)] = \(e)")
 }
	let a = [["a","b"],["x","y"]]
	let b = a.enumerate().flatMap { (i, a) in a.enumerate().map { (i, $0.0, $0.1) } }
	b.forEach { (i, j, e) in
	print("a[\(i)][\(j)] = \(e)")
	}