add day 6, 7 and 8

Author: zyhou

2024/06/index.ts

@@ -0,0 +1,37 @@
+import type { Expect, Equal } from "type-testing";
+
+const createRoute = <Route extends string | number>(
+  author: string,
+  route: Route,
+) => {
+  console.log(
+    `[createRoute] route created by ${author} at ${Date.now().toLocaleString()}`,
+  );
+  return route;
+};
+
+// ------------------- Test section ---------------------
+
+const oneMill = createRoute("🌩️Donner", 100_000_000);
+type t0_actual = typeof oneMill; // =>
+type t0_expected = 100_000_000; // =>
+type t0 = Expect<Equal<t0_actual, t0_expected>>;
+
+const two = createRoute("🔴Rudolph", 2);
+type t1_actual = typeof two; // =>
+type t1_expected = 2; // =>
+type t1 = Expect<Equal<t1_actual, t1_expected>>;
+
+const three = createRoute("💨Dasher", "3");
+type t2_actual = typeof three; // =>
+type t2_expected = "3"; // =>
+type t2 = Expect<Equal<t2_actual, t2_expected>>;
+
+// @ts-expect-error
+createRoute("🌟Vixen", true);
+
+// @ts-expect-error
+createRoute("💃Dancer", [1]);
+
+// @ts-expect-error
+createRoute("☄️Comet", { 1: 1 });

2024/07/index.ts

@@ -0,0 +1,36 @@
+import type { Expect, Equal } from "type-testing";
+
+const createRoute = <const Route extends string[]>(
+  author: string,
+  route: Route,
+) => ({
+  author,
+  route,
+  createdAt: Date.now(),
+});
+
+// ------------------- Test section ---------------------
+
+const oneMill = createRoute("💨Dasher", [
+  "Atherton",
+  "Scarsdale",
+  "Cherry Hills Village",
+]).route;
+type t0_actual = typeof oneMill; // =>
+type t0_expected = [
+  // =>
+  "Atherton",
+  "Scarsdale",
+  "Cherry Hills Village",
+];
+type t0 = Expect<Equal<t0_actual, t0_expected>>;
+
+const two = createRoute("🌟Vixen", ["Detroit", "Cleveland", "Dayton"]).route;
+type t1_actual = typeof two; // =>
+type t1_expected = [
+  // =>
+  "Detroit",
+  "Cleveland",
+  "Dayton",
+];
+type t1 = Expect<Equal<t1_actual, t1_expected>>;

2024/08/index.d.ts

@@ -0,0 +1,39 @@
+import type { Expect, Equal } from "type-testing";
+
+// use d.ts file
+declare global {
+  interface ProcessEnv {
+    MOOD_LIGHTS: "true";
+    BATH_TEMPERATURE: "327.59";
+    STRAWBERRIES: "chocolate";
+  }
+}
+
+// Solution in advent of ts website:
+// declare global {
+//   namespace NodeJS {
+//     interface ProcessEnv {
+//       MOOD_LIGHTS: "true";
+//       BATH_TEMPERATURE: "327.59";
+//       STRAWBERRIES: "chocolate";
+//     }
+//   }
+// }
+// export {};
+
+// ------------------- Test section ---------------------
+
+const { MOOD_LIGHTS } = process.env;
+type t0_actual = typeof MOOD_LIGHTS; // =>
+type t0_expected = "true"; // =>
+type t0 = Expect<Equal<t0_actual, t0_expected>>;
+
+const { BATH_TEMPERATURE } = process.env;
+type t1_actual = typeof BATH_TEMPERATURE; // =>
+type t1_expected = "327.59"; // =>
+type t1 = Expect<Equal<t1_actual, t1_expected>>;
+
+const { STRAWBERRIES } = process.env;
+type t2_actual = typeof STRAWBERRIES; // =>
+type t2_expected = "chocolate"; // =>
+type t2 = Expect<Equal<t2_actual, t2_expected>>;