In this episode we dive deep into some specific refactors from Refactoring 's Chapter 1. We talk about renaming things, extracting functions, functions, replacing a temp with query and some other hot tips and tricks you can put into your code today.
This episode walks through specific code examples from Chapter 1 of Martin Fowler's Refactoring...
Some of the refactors
Change Function Declaration
- Rename things
- Names are hard
- A few general categories of things you can name
- predicate? - Should only return true / false - Javascript start with is - ruby question mark - so isValidPhone(number)
- In Ruby - ! For destructive / dangerous actions - update_recent_activity! - name destructive actions or actions with side effects really well.
- Formatting? - use - as - number_as_phone(number) or to to_bmi(user.weight, user.height)
Extract Function
Replace temp w/ query
- Extending this example:
Instead of:
accounts = get_accounts(user)
transactions = get_transactions(accounts)
we can just do:
transactions = get_transactions(get_accounts(user))
Replace conditional with polymorphism
Notification.deliver! example
Picks
- JP: Thanos JS - https://thanosjs.org/
- John: Loom https://www.loom.com/ - and http://www.telestream.net/screenflow/overview.htm