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| 2024-04-30 20:16:41 +0200 | peterbecich | (~Thunderbi@47.229.123.186) |
| 2024-04-30 20:13:01 +0200 | <int-e> | join (fmap (return . f) xs) = join (fmap return (fmap f xs)) = fmap f xs |
| 2024-04-30 20:12:54 +0200 | <c_wraith> | I'm pretty sure that law is free if the other laws are followed. |
| 2024-04-30 20:12:45 +0200 | <geekosaur> | the monad laws document the relationship that makes this work |
| 2024-04-30 20:12:17 +0200 | <yin> | something something lawful instances |
| 2024-04-30 20:11:46 +0200 | <geekosaur> | (well, in CT >>= doesn't exist; more correctly, that's how you would define it in CT) |
| 2024-04-30 20:11:04 +0200 | <geekosaur> | in category theory >>= is join + fmap. by applying an identity to one of those operations, you can reconstruct the other; so `return`/`pure` lets you recover `fmap` and `id` lets you recover `join` |
| 2024-04-30 20:10:49 +0200 | <monochrom> | But if the question is why it is correct, then the answer is it is one of the monad laws. |
| 2024-04-30 20:10:22 +0200 | <monochrom> | I don't understand the question. You already have an implementation right there. :) |
| 2024-04-30 20:09:39 +0200 | <justsomeguy> | Can someone help me understand how fmap can be implemented in terms of (\f xs -> xs >>= return . f)? |
| 2024-04-30 20:02:33 +0200 | justsomeguy | (~justsomeg@user/justsomeguy) |
| 2024-04-30 19:59:02 +0200 | mzschr | (~mzschr@2a07-a880-4603-1035-18b5-1e9f-f698-63a6.pool6.ovpn.com) (Quit: Client closed) |
| 2024-04-30 19:59:02 +0200 | euleritian | (~euleritia@77.22.252.56) |
| 2024-04-30 19:58:17 +0200 | euleritian | (~euleritia@ip4d16fc38.dynamic.kabel-deutschland.de) (Read error: Connection reset by peer) |
| 2024-04-30 19:57:35 +0200 | peterbecich | (~Thunderbi@47.229.123.186) (Ping timeout: 264 seconds) |
| 2024-04-30 19:56:13 +0200 | destituion | (~destituio@2a02:2121:340:2456:fffe:d0f:7737:dd1) |
| 2024-04-30 19:55:37 +0200 | rvalue | (~rvalue@user/rvalue) |
| 2024-04-30 19:55:07 +0200 | rvalue | (~rvalue@user/rvalue) (Read error: Connection reset by peer) |
| 2024-04-30 19:52:49 +0200 | glguy | (g@libera/staff/glguy) |
| 2024-04-30 19:51:34 +0200 | glguy | (g@libera/staff/glguy) (Quit: Quit) |
| 2024-04-30 19:48:33 +0200 | raym | (~ray@user/raym) (Ping timeout: 268 seconds) |
| 2024-04-30 19:48:28 +0200 | destituion | (~destituio@85.221.111.174) (Ping timeout: 260 seconds) |
| 2024-04-30 19:45:50 +0200 | euleritian | (~euleritia@ip4d16fc38.dynamic.kabel-deutschland.de) |
| 2024-04-30 19:45:24 +0200 | euleritian | (~euleritia@77.22.252.56) (Read error: Connection reset by peer) |
| 2024-04-30 19:45:24 +0200 | demon-cat | (~demon-cat@dund-15-b2-v4wan-169642-cust1347.vm6.cable.virginm.net) |
| 2024-04-30 19:43:35 +0200 | euleritian | (~euleritia@77.22.252.56) |
| 2024-04-30 19:42:13 +0200 | euleritian | (~euleritia@ip4d16fc38.dynamic.kabel-deutschland.de) (Read error: Connection reset by peer) |
| 2024-04-30 19:35:52 +0200 | todi | (~todi@p57803331.dip0.t-ipconnect.de) |
| 2024-04-30 19:32:25 +0200 | demon-cat | (~demon-cat@dund-15-b2-v4wan-169642-cust1347.vm6.cable.virginm.net) (Ping timeout: 245 seconds) |
| 2024-04-30 19:31:14 +0200 | pavonia | (~user@user/siracusa) (Quit: Bye!) |
| 2024-04-30 19:28:05 +0200 | tri | (~tri@ool-18bbef1a.static.optonline.net) (Ping timeout: 240 seconds) |
| 2024-04-30 19:24:35 +0200 | danza | (~francesco@151.43.202.238) (Ping timeout: 264 seconds) |
| 2024-04-30 19:23:58 +0200 | tri | (~tri@ool-18bbef1a.static.optonline.net) |
| 2024-04-30 19:20:35 +0200 | <yin> | or maybe i'm misunderstanding |
| 2024-04-30 19:15:26 +0200 | <yin> | multiline signatures i'm guessing |
| 2024-04-30 19:15:13 +0200 | <yin> | ah i see |
| 2024-04-30 19:10:21 +0200 | yin | (~yin@user/zero) |
| 2024-04-30 19:08:49 +0200 | yin | (~yin@user/zero) (Ping timeout: 256 seconds) |
| 2024-04-30 19:02:50 +0200 | euleritian | (~euleritia@ip4d16fc38.dynamic.kabel-deutschland.de) |
| 2024-04-30 19:02:42 +0200 | euleritian | (~euleritia@77.22.252.56) (Read error: Connection reset by peer) |
| 2024-04-30 19:02:42 +0200 | ft | (~ft@p3e9bc1bf.dip0.t-ipconnect.de) |
| 2024-04-30 19:00:08 +0200 | tromp | (~textual@92-110-219-57.cable.dynamic.v4.ziggo.nl) |
| 2024-04-30 18:57:52 +0200 | rosco | (~rosco@yp-146-6.tm.net.my) (Quit: Lost terminal) |
| 2024-04-30 18:57:35 +0200 | tromp | (~textual@92-110-219-57.cable.dynamic.v4.ziggo.nl) (Quit: My iMac has gone to sleep. ZZZzzz…) |
| 2024-04-30 18:57:24 +0200 | Square | (~Square@user/square) |
| 2024-04-30 18:51:40 +0200 | euleritian | (~euleritia@77.22.252.56) |
| 2024-04-30 18:51:33 +0200 | raehik | (~raehik@rdng-25-b2-v4wan-169990-cust1344.vm39.cable.virginm.net) (Ping timeout: 272 seconds) |
| 2024-04-30 18:50:41 +0200 | <dminuoso> | Or `t -> t` even, stuff of that shape |
| 2024-04-30 18:50:19 +0200 | euleritian | (~euleritia@77.22.252.56) (Read error: Connection reset by peer) |
| 2024-04-30 18:50:19 +0200 | <dminuoso> | Though its conceivable that bindings of type `(t -> t) -> t -> t` (without an explicit type signature) could fall into this trap as well |