mikeash/nil-ptr.swift

Created January 20, 2018 02:46

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mikeash created this gist Jan 20, 2018.

nil-ptr.swift

-Original file line number
+Diff line change
@@ -0,0 +1,11 @@
+    let ptr = {}
+    func -<T>(lhs: T?, rhs: () -> Void) -> T? {
+        return nil
+    }
+    var d: [String: String] = [:]
+    d["one"] = "won"
+    d["two"] = "too"
+    d["one"] = nil-ptr
+    d["two"] = nil-ptr
+    print(d) // [:]