Add concept exercise named-resistor-color

[depial]

This is meant to accompany the names-attribute concept. It is based on the resistor-color trio of exercises but is meant to push students down a named vector approach. To this end, the "practices" and "prerequisites" for the practice exercises resistor-color and resistor-color-duo have been set to vector-filtering, which is a prerequisite for this concept.

Notes:

• Tests have been grouped into single testsets. This can be changed to one test per testset for clarity if needed.
• Expected of student: create named vector, use unname, attempt named indexing.

[depial]

A quick note: I used configlet to create the exercise, and it automatically filled in examplar.R instead of exemplar.R, so we should probably track down the source of that typo.

[colinleach]

we should probably track down the source of that typo

Looks like config.json, line 32

Also, lasagna/.meta/config.json

[depial]

Looks like config.json, line 32

Let's merge this first, then I'll correct the config.json entries.

[depial]

Works on the site, but it took a long time to pass again. I'm hoping I just have to restart my computer or something.

[colinleach]

It's also slow for me. Kind of worrying.

Update: it may be a server issue. It timed out, but when I refreshed the page it said I passed.

[depial]

It timed out, but when I refreshed the page it said I passed.

I noticed behavior like this earlier too. For me, I didn't refresh, I just clicked the Run tests button after it timed out, without any code changes, and it immediately returned the results (w/ zero latency).

it may be a server issue.

I can believe this now. It feels like it's been quite inconsistent. I was having trouble earlier today, then it seemed to go back to normal.

[colinleach]

I'm also seeing this on the Julia and Python tracks (Lasagna, in both cases, so nothing challenging)

[colinleach]

I've posted an FYI to the Maintainers channel on Discord. It may be related to Jeremy getting the Jiki stuff together - we also had glitches a year ago when the bootcamp launched.

[depial]

I've posted an FYI to the Maintainers channel on Discord.

On the plus side, I think that's about all we can do.

However, it's very much like the universe to make me nervous after I've been messing about in the test runners 😅