[GUIDE] How to create a new formula for HyperFormula engine

[scarletfog]

Description

For the contributors that would want to help finish the long "missing formulas" list.

Brainstorming:

• [ ] How a formula is build
• [ ] How they are grouped, which file should it be added to
• [ ] Where tests are located and how they are organized
• [ ] Checklist for completeness:
  • [ ] formula
  • [ ] tests
  • [ ] translations
  • [ ] meta data
• [ ] Where to find the spec (Open Document Format Formula spec)
• [ ] How to deal with incompatibilities with other spreadsheets if any
• [ ] CLA requirement
• [ ] Where to find the missing formulas list

Links

Might be a part of the readme https://github.com/handsontable/hyperformula/issues/8 "contributing" section. Location for formulas, they are stored and grouped as plugins https://github.com/handsontable/hyperformula/tree/master/src/interpreter/plugin

This issue was transferred, the original author: @wojciechczerniak