Generics from practice

First<T> - Gets type of the first element of the array

Last<T> - Gets type of the last element of the array

Flatten<T> - Flats your object

Original Object Structure               | Flattened Object Structure
--------------------------------------- | ---------------------------------
{                                       | {
  a: 1,                                 |   'a': number,
  b: {                                  |   'b.c': number
    c: 2                                | }
  }                                     |
}                                       |

NestedKeys<T> - Returns all keys of object

NestedValues<T> - Returns types of all object properties

Zip<T, U> - [a, b], [c, d] -> [[a, c], [b,d]]

DeepWritable<T> - Removes a readonly modifier from properties

DeepReadonly<T> - Returns a readonly object

FunctionArguments<T> - Returns type of the function's arguments

Concat<T, U> - Return concatenated array

Guards

• IsString<T>
• IsNumber<T>
• IsBoolean<T>
• IsFunction<T>
• IsObject<T>