Typescript examples

README.md

@@ -1,12 +1,22 @@
 # Minesweeper
 
-## Lecture 1 Minesweeper presentation
 
-## Lecture 2 Github repository overview
+## Secture 1 Introduction
+
+### Minesweeper presentation
+
+### Github repository overview
 [Creating a new repository](https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/creating-a-repository-on-github/creating-a-new-repository)
 
-## Lecture 3 Project init
+### Project init
 [Pull request](https://github.com/nickovchinnikov/minesweeper/pull/1)
 
-## Lecture 4 Code-style tools Eslint and Prettier
+### Code-style tools Eslint and Prettier
 [Pull request](https://github.com/nickovchinnikov/minesweeper/pull/2)
+
+### Typescript basic
+### Parametric typing with generics
+### Interfaces, Types and Union
+### Unknown, never and Tuple
+### UtilityTypes
+[Pull request](https://github.com/nickovchinnikov/minesweeper/pull/3)

examples/Types/examples.ts

@@ -0,0 +1,76 @@
+type UserPermissions = 'admin' | 'user' | 'manager';
+
+type PermissionsWithoutAdmin = Exclude<UserPermissions, 'admin'>;
+
+interface DepartmentsForPermission {
+  depName: string;
+  lvl: number;
+}
+
+const DepsForPerms: Record<UserPermissions, DepartmentsForPermission> = {
+  admin: {
+    depName: 'security',
+    lvl: 10,
+  },
+  user: {
+    depName: 'sales',
+    lvl: 5,
+  },
+  manager: {
+    depName: 'sales',
+    lvl: 10,
+  },
+};
+
+type TuplePermissinons = [UserPermissions, UserPermissions];
+
+type BasicUser<A = boolean, P = TuplePermissinons> = {
+  name: string;
+  surname: string;
+  age: number;
+  isAdmin: A;
+  permissions?: P;
+};
+
+type BasicUserWithoutPermissions = Omit<BasicUser, 'permissions'>;
+
+type AdvancedUser = {
+  account: number;
+};
+
+type FullUser<A = boolean, P = string[]> = BasicUser<A, P> & AdvancedUser;
+
+type BasicUserReadonly = Readonly<BasicUser>;
+type BasicUserRequired = Required<BasicUser>;
+type BasicUserPartial = Partial<BasicUser>;
+
+type BasicUserReadonlyRequired = Readonly<Required<BasicUser>>;
+
+const user: FullUser<boolean> = {
+  name: 'Nick',
+  surname: 'Ovchinnikov',
+  age: 30,
+  isAdmin: true,
+  account: 100,
+  permissions: ['admin', 'user'],
+};
+
+user.name = 'Test';
+
+const usersArray: FullUser[] = [user, user];
+
+function getFirst<T>(arr: T[]): T {
+  return arr[0];
+}
+
+type BasicFunction = () => FullUser[];
+
+type getFirstReturnType = ReturnType<BasicFunction>;
+
+getFirst<FullUser>(usersArray);
+
+type MathFunc<T = number> = (a: T, b: T) => T;
+
+const mul: MathFunc = (a, b) => a * b;
+
+const add: MathFunc = (a, b) => a + b;