Builder Design Pattern is a design pattern, which is used to create object from a complex or from a general object.
Finding a complexity for a program is always an important task. It gives us clear indication of how much slower or faster our program will get when you give more data input at it.
Streams are core concept of nodejs. Streams are data (array or object), they do not process all at once rather than piece by piece.
The Intl object provides access to several constructors, each of them allows to do string comparison, number formatting and date and time formatting.
An expression is any valid set of literals, variables, operators that evaluates to a single value.