fix: move "interfaces vs types" back to the appropriate section"

Author: mike-north

notes/3-interface-type-basics.ts

@@ -102,4 +102,28 @@ import { HasPhoneNumber, HasEmail } from "./1-basics";
 // phoneDict.office; // definitely present
 // phoneDict.mobile; // MAYBE present
 
+// == TYPE ALIASES vs INTERFACES == //
+
+/**
+ * (7) Type aliases are initialized synchronously, so self-referential stuff is 👎
+ */
+
+// type NumberVal = 1 | 2 | 3 | NumberArr;
+// type NumberArr = NumberVal[];
+
+/**
+ * (8) Interfaces are initialized lazily, so combining it
+ * -   w/ a type alias allows for recursive types!
+ */
+
+// type StringVal = "a" | "b" | "c" | StringArr;
+
+// // type StringArr = StringVal[];
+// interface StringArr {
+//   // arr[0]
+//   [k: number]: "a" | "b" | "c" | StringVal[];
+// }
+
+// const x: StringVal = Math.random() > 0.5 ? "b" : ["a"]; // ✅ ok!
+
 export default {};

notes/4-class-basics.ts

@@ -78,27 +78,3 @@ import { HasPhoneNumber, HasEmail } from "./1-basics";
 //     console.log("sending an email");
 //   }
 // }
-
-// == TYPE ALIASES vs INTERFACES == //
-
-/**
- * (7) Type aliases are initialized synchronously, so self-referential stuff is 👎
- */
-
-// type NumberVal = 1 | 2 | 3 | NumberArr;
-// type NumberArr = NumberVal[];
-
-/**
- * (8) Interfaces are initialized lazily, so combining it
- * -   w/ a type alias allows for recursive types!
- */
-
-// type StringVal = "a" | "b" | "c" | StringArr;
-
-// // type StringArr = StringVal[];
-// interface StringArr {
-//   // arr[0]
-//   [k: number]: "a" | "b" | "c" | StringVal[];
-// }
-
-// const x: StringVal = Math.random() > 0.5 ? "b" : ["a"]; // ✅ ok!