Emoji hash

[hadley]

To quickly compare whether or not two session infos are the same, it would be useful to generate an emoji hash (i.e. hash package names and versions, then display by indexing into emoji)

e.g. https://www.npmjs.com/package/hash-emoji

[gaborcsardi]

See comment in #6. I am actually not sure if emojis are better than sg like ssh randomart:

+--[ RSA 2048]----+
|       o=.       |
|    o  o++E      |
|   + . Ooo.      |
|    + O B..      |
|     = *S.       |
|      o          |
|                 |
|                 |
|                 |
+-----------------+

[hadley]

Emojis are clearly better!!

[gaborcsardi]

With emojis you'll have a lot of collisions, because their space is small.

Anyway, whatever the hash function is, I think the crucial part is figuring out what to hash, e.g. you probably don't want to has installation dates, etc.

[hadley]

I was thinking of like 5 emoji, and 2823 ^ 5 is quite large 😉

[gaborcsardi]

OK, we still need to think about what to hash. Also, it probably makes sense to hash the session info and the package info separately, so that we can at least see which one is different. So maybe we can have 2 and 3 (or 1 and 4?) emojis for both.

[gaborcsardi]

I added this, and it is cool and useful, but it does have the usual cons wrt emojis. Font might not have them, display width could be wrong, etc. It is using 2280 hand-picked emojis now that looked good in RStudio. Some of them have very long names, that's not ideal, either, because of platforms without emoji support we show that names.

It looks like this:

❯ session_info()
─ Session info  📜  🌈  🧚   ──────────────────────────────────────────────────────────────
 setting        value
 version        R version 4.1.1 (2021-08-10)
 os             macOS Mojave 10.14.6
 system         x86_64, darwin17.0
 ui             X11
 language       (EN)
 collate        en_US.UTF-8
...

and without emojis like this:

❯ session_info()
─ Session info  ───────────────────────────────────────────────────────────────────────────
 hash: scroll, rainbow, fairy

 setting        value
 version        R version 4.1.1 (2021-08-10)
 os             macOS Mojave 10.14.6
 system         x86_64, darwin17.0
 ui             X11
 language       (EN)
 collate        en_US.UTF-8

An alternative would be to use the adjective-animals data for hashing:

❯ cli::hash_animal("foobar")$hash
[1] "unevolving degrading harrier"