?? ??? TypeScript? ?? ??? ?? ? ???? ???? ??? ?? ???? ????? ???? ?? ???? ??? ??? ? ????. ??? ??????? ?? ????? ?? ??? ??? ??? ?? ????? ???????. ? ????? ??? ???? TypeScript ?? ??? ??? ??? ?? ??? ???? ?? ??, ???? ??, ???? ??? ??? ? ?? ???? ?? ????.

?? ???? ??????
TypeScript? ?? ??? ?? ????? ?? ????? ?? ??, ?? ?? ?? ???? ??? ??? ? ????. ???? ??? ???? ?? ?? ??? ???? ????? ???, ?? ?? ?? ??? ??? ??? ??? ??????? ??????.

?? ??? ?? ????

1. ?? ???? ? ?? ??
TypeScript? ??? ???? ??? ?? ?? ?? ??? ? ????. ??? ??? ???? ????? ????? ??? ??? ???? ??? ?? ??????.

const multiply = (a: number, b: number) => a * b;
// Return type inferred as number

function wrapInArray<T>(value: T) {
  return [value];
}
// Return type inferred as T[]

2. ???? ??? ??
Generics? ???? ?? ????? ???? ??? ??? ??? ??? ? ????. TypeScript? ???? ?? ??? ??? ? ??? ?????.

function identity<T>(arg: T): T {
  return arg;
}

const result = identity(42);
// T inferred as number

???? ??, ?? ?? ?? ??? ?? ???? ???? ?? ??? ? ?? ???? ? ? ? ?????.

3. ?? ??? ?? ??
?, ?? ?? ??? ?? ??? ?? ?? ??? ?? ??? ?? ??? ?? ?????.

const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
// TypeScript infers num as number

??? ?? ??? ?? ???? ???? ??? ????? ??? ? ????.

function applyToAll<T, R>(items: T[], func: (item: T) => R): R[] {
  return items.map(func);
}

const lengths = applyToAll(["hello", "world"], str => str.length);
// T inferred as string, R inferred as number

4. ??? ??? ??? ??
??? ??? ?? ??? ???? ???? TypeScript? ??? ??? ???? ??? ??? ? ????.

type IsString<T> = T extends string ? true : false;

type Test1 = IsString<string>; // true
type Test2 = IsString<number>; // false

?? ??? ??? ???? ?? ??? ??? ??? ? ?? ?????.

5. ???? ?? ??
?? ?? ?? ?? ??? ??? ? TypeScript? ??? ??? ???? ??? ?????.

const person = { name: "Alice", age: 30 };
const { name } = person;
// TypeScript infers name as string

6. ??? ??? ??
?? ????????? RxJS, Lodash ?? ??? ?? ?????? ?? ?????? ??? ? ?? ??? ?? ????.

const pipeline = [1, 2, 3].map(num => num * 2).filter(num => num > 3);
// Inferred as number[]

? ??? ????? ?? ???? ??? ??? ???? ??? ?? ??? ?????.

function compose<T, R>(f: (arg: T) => R, g: (arg: R) => T) {
  return (x: T) => g(f(x));
}

?? ??? ??? ??

1. ?? ???? ??
??? TypeScript? ??? ??? ?? ?? ???? ???? ???? ?????.

const multiply = (a: number, b: number) => a * b;
// Return type inferred as number

function wrapInArray<T>(value: T) {
  return [value];
}
// Return type inferred as T[]

?: ??? ????? ???? ???? ??? ??? ?????.

function identity<T>(arg: T): T {
  return arg;
}

const result = identity(42);
// T inferred as number

2. ??? ???
??? TypeScript? ??? ???? ?? ???? ???? ??? ??? ? ????.

const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
// TypeScript infers num as number

3. ??? ??
??? ?? ?? ??? ??? ???? ?? ??? ?????.

function applyToAll<T, R>(items: T[], func: (item: T) => R): R[] {
  return items.map(func);
}

const lengths = applyToAll(["hello", "world"], str => str.length);
// T inferred as string, R inferred as number

??: ??? ??? ??? ??

??? ??(MDN) ??? ??(Microsoft Learning) TypeScript? ?? ?? ? ????: https://Shafayet.zya.me ??? Bing? ??? ?????...

? ??? TypeScript? ??? ?????? ?? ?? ?????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!