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Change pure functions to functions #27192

Merged
merged 1 commit into from
Jul 15, 2021
Merged

Change pure functions to functions #27192

merged 1 commit into from
Jul 15, 2021

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mastoj
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@mastoj mastoj commented Jul 15, 2021

The right terminology should be used so we don't learn new developers wrong facts.

Using pure function here is plain wrong, the definition of a pure functions is as follows:

The function return values are identical for identical arguments. The function application has no side effects.

What you have here both have side effects, the calls to res.setXXX, and it isn't identical for identical arguments since you have Date.now().

Bug

  • Related issues linked using fixes #number
  • Integration tests added
  • Errors have helpful link attached, see contributing.md

Feature

  • Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
  • Related issues linked using fixes #number
  • Integration tests added
  • Documentation added
  • Telemetry added. In case of a feature if it's used or not.
  • Errors have helpful link attached, see contributing.md

Documentation / Examples

  • Make sure the linting passes

The right terminology should be used so we don't learn new developers wrong facts.

Using pure function here is plain wrong, the definition of a pure functions is as follows:

> The function return values are identical for identical arguments. The function application has no side effects. 

What you have here both have side effects, the calls to `res.setXXX`, and it isn't identical for identical arguments since you have `Date.now()`.
@kodiakhq kodiakhq bot merged commit d29a95a into vercel:canary Jul 15, 2021
flybayer pushed a commit to blitz-js/next.js that referenced this pull request Aug 19, 2021
The right terminology should be used so we don't learn new developers wrong facts.

Using pure function here is plain wrong, the definition of a pure functions is as follows:

> The function return values are identical for identical arguments. The function application has no side effects. 

What you have here both have side effects, the calls to `res.setXXX`, and it isn't identical for identical arguments since you have `Date.now()`.



## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes
@vercel vercel locked as resolved and limited conversation to collaborators Jan 28, 2022
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3 participants