Pure Ts Tour May 2026

// Custom type guard interface Cat meow(): void;

console.log(fruits, numbers, person, taskStatus); src/features/3-functions.ts

console.log(processValue("hello")); console.log(processValue(3.1415)); src/features/8-utility-types.ts pure ts tour

console.log( $username, $age, active: $isActive );

// Generic constraint function getLength<T extends length: number >(item: T): number return item.length; // Custom type guard interface Cat meow(): void; console

// Generic function function identity<T>(value: T): T return value;

// Rest parameters function sumAll(...nums: number[]): number return nums.reduce((acc, n) => acc + n, 0); src/features/8-utility-types.ts console.log( $username

// Partial: make all properties optional function updateTodo(todo: Todo, fields: Partial<Todo>): Todo return ...todo, ...fields ;