Scripting

What

• A program, that does some task, which is small and simple. That does not need to be a observed. Automates some task which would take a lot of time.

• Generally some one off script, but could be used often

• Generally intended for the creator.

• tends to be a series of commands that starts, runs, and terminates. It often requires no/little human interaction

• Using written using an interpreted language like bash/python/ruby

• a program that primarily executes linearly, rather than with lots of sequential logic or subroutines

• is rarely sold to a customer

• usually take an initial input state from the user and formulates the output based on that

• A "script" is code that acts upon some system in an external or independent manner and can be removed or disabled without disabling the system itself.

Difference between script and application

• Application

  • is intended to be used by a customer (perhaps an internal one) and thus should include documentation and support

  • tends to be used interactively

  • Larger scale

  • geared toward providing functionality that is more refined and geared toward an end user

  • is planned. It has multiple goals, it has multiple deliverables. There are tasks set aside at design time in advance of coding that the application must meet.

  • An application comprises multiple components and subsystems that work together to accomplish a larger goal for the user. It will likely need to use design patterns and factorization to keep this complexity manageable.

  • generally allows the user to manipulate the state mid-execution through user interaction and reformulates output dynamically based on that.

  • are complex and robust, and designed to interact with user throughout the whole run of the program.

  • A "program" is code that constitutes a system. The program's code may be written in a modular manner, with good separation of concerns, but the code is fundamentally internal to, and a dependency of, the system itself.