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| 2024-09-02 04:27:33 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 04:22:42 +0200 | <geekosaur> | this is the same thing, lambdabot uses a `takeWhile` to limit the output size, so only 28 values are demanded from the technically-"infinite" [1..] |
| 2024-09-02 04:21:54 +0200 | <lambdabot> | [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,... |
| 2024-09-02 04:21:52 +0200 | <geekosaur> | > [1..] |
| 2024-09-02 04:21:30 +0200 | <geekosaur> | so you generally don't need to explicitly "break" out of a loop, you can let laziness do it for you |
| 2024-09-02 04:20:36 +0200 | <geekosaur> | the `undefined` is never reached because `takeWhile` stops demanding values from the list when `map` produces a 5 |
| 2024-09-02 04:19:39 +0200 | <lambdabot> | [3,2] |
| 2024-09-02 04:19:37 +0200 | <geekosaur> | > takeWhile (<5) (map (+1) [2,1,4,undefined]) |
| 2024-09-02 04:17:39 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 260 seconds) |
| 2024-09-02 04:12:37 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 04:09:24 +0200 | <geekosaur> | also, the actual data structure matters a lot here: lists are inherently lazy, Sets and Maps are inherently spine and key strict (Maps can be value-lazy though) |
| 2024-09-02 03:56:05 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 248 seconds) |
| 2024-09-02 03:51:31 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 03:42:14 +0200 | <weary-traveler> | yeah, perhaps the lack of explicitly mentioning laziness was the missing piece |
| 2024-09-02 03:41:06 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 276 seconds) |
| 2024-09-02 03:40:51 +0200 | <geekosaur> | (lists are lazy) |
| 2024-09-02 03:40:42 +0200 | <geekosaur> | you can do it in multiple steps, you know. if you `takeWhile whatever (fmap …)` the fmap will stop automatically when takeWhile does |
| 2024-09-02 03:37:06 +0200 | <albet70> | athan , reduce the list to something is already filter |
| 2024-09-02 03:36:25 +0200 | gabiruh | (~gabiruh@vps19177.publiccloud.com.br) |
| 2024-09-02 03:36:13 +0200 | <weary-traveler> | heh |
| 2024-09-02 03:36:06 +0200 | <geekosaur> | rip your sanity |
| 2024-09-02 03:35:23 +0200 | <yahb2> | 2 ; 4 ; 6 ; 8 ; 10 ; 12 ; 14 ; 16 ; 18 ; 20 ; 22 ; 24 ; 26 ; 28 ; 30 ; 32 ; 34 ; 36 ; 38 ; 40 ; 42 |
| 2024-09-02 03:35:23 +0200 | <probie> | % (`runContT` pure) $ callCC $ \break -> forM_ [1..100] $ \i -> do { when (even i) $ lift $ print i; when (i == 42) $ break() } |
| 2024-09-02 03:35:07 +0200 | L29Ah | (~L29Ah@wikipedia/L29Ah) |
| 2024-09-02 03:32:45 +0200 | <athan> | I forgot about takeWhile, that's a better choice |
| 2024-09-02 03:32:09 +0200 | <athan> | albet70 this is usually done with a fold rather than a uniform mapping or something that's guarateed to affect all cases. If you're "looking" for something, maybe `findIndex` would work. But if you're trying to "do something to everything until a condition is met", I'd reduce the list to something that represents the data you want to manage, then apply your map or what have you. |
| 2024-09-02 03:31:55 +0200 | <albet70> | lets assum filter on a list, filter (> 0) [1..22] when the matching item is above five, stop filter the rest, return immediatly |
| 2024-09-02 03:31:30 +0200 | L29Ah | (~L29Ah@wikipedia/L29Ah) (Excess Flood) |
| 2024-09-02 03:31:29 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 03:30:33 +0200 | <lambdabot> | [0,2,4] |
| 2024-09-02 03:30:31 +0200 | <weary-traveler> | > takeWhile even [0,2,4,5,6,8,10] |
| 2024-09-02 03:30:28 +0200 | <weary-traveler> | albet70: something like takeWhile ? |
| 2024-09-02 03:27:43 +0200 | <probie> | What does it mean to `break` in a functional language? |
| 2024-09-02 03:27:39 +0200 | <probie> | <bad joke>just call `error` and thiings will break</bad joke> |
| 2024-09-02 03:26:08 +0200 | athan | (~athan@syn-098-153-145-140.biz.spectrum.com) |
| 2024-09-02 03:25:44 +0200 | athan | (~athan@syn-098-153-145-140.biz.spectrum.com) (Ping timeout: 272 seconds) |
| 2024-09-02 03:22:25 +0200 | tt123109783243 | (~tt1231@2603:6010:8700:4a81:219f:50d3:618a:a6ee) |
| 2024-09-02 03:21:53 +0200 | tt123109783243 | (~tt1231@2603:6010:8700:4a81:219f:50d3:618a:a6ee) (Quit: The Lounge - https://thelounge.chat) |
| 2024-09-02 03:21:18 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 272 seconds) |
| 2024-09-02 03:19:58 +0200 | Unicorn_Princess | (~Unicorn_P@user/Unicorn-Princess/x-3540542) |
| 2024-09-02 03:16:02 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 03:15:38 +0200 | <albet70> | break can break the for loop in python, is there something can break in fmap or filter? |
| 2024-09-02 03:07:15 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 244 seconds) |
| 2024-09-02 03:02:40 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 02:52:10 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 272 seconds) |
| 2024-09-02 02:47:14 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) |
| 2024-09-02 02:42:28 +0200 | JuanDaugherty | (~juan@user/JuanDaugherty) (Quit: JuanDaugherty) |
| 2024-09-02 02:38:17 +0200 | Mateon2 | Mateon1 |
| 2024-09-02 02:36:44 +0200 | merijn | (~merijn@204-220-045-062.dynamic.caiway.nl) (Ping timeout: 260 seconds) |
| 2024-09-02 02:35:59 +0200 | Mateon2 | (~Thunderbi@user/meow/Mateon1) |