update func

add json

add date and time

add descructuring

add weak map and set, object keys, values, entries, destruction

add set

add map

update arrays

update arrays js

add more array func

array methods

update arrays

add arrays

add new str method

number learn

add number and primitive types by object

add symbol, constructor, this

update object

add object and update func

update

add switch and func

add nullable

update

update