2023-08-16T09:20:47.833Z

src/020-objects/065.2-no-autocomplete-on-omit.explainer.ts

@@ -0,0 +1,15 @@
+type User = {
+  id: number;
+  name: string;
+  email: string;
+};
+
+// You can omit properties which don't exist!
+type UserWithoutPhoneNumber = Omit<User, "phoneNumber">;
+
+// But you CAN'T pick properties which don't exist
+type UserWithOnlyPhoneNumber = Pick<
+  User,
+  // @ts-expect-error
+  "phoneNumber"
+>;

src/020-objects/065.5-omit-and-pick-cant-discribute.explainer.ts

@@ -0,0 +1,7 @@
+type DistributiveOmit<T, K extends PropertyKey> = T extends any
+  ? Omit<T, K>
+  : never;
+
+type DistributivePick<T, K extends keyof T> = T extends any
+  ? Pick<T, K>
+  : never;