Post B32mYkfisvvKB6s90C by jonathanhogg@mastodon.social
(DIR) More posts by jonathanhogg@mastodon.social
(DIR) Post #B32boBiHWtBqtRE8rg by futurebird@sauropods.win
2026-02-06T10:02:21Z
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CS people what do you call // ?As in 16//5=3* integer divide* double divide* floor* floor divide
(DIR) Post #B32c7pGOhsbF3fY4VE by ehproque@neopaquita.es
2026-02-06T10:05:51Z
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@futurebird are you telling me that all these years I didn't need to do floor(16/5) ??
(DIR) Post #B32cAYqkBn5f1Kqz7Q by RogerBW@discordian.social
2026-02-06T10:06:22Z
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@futurebird Integer division, truncating division, Euclidean division.
(DIR) Post #B32cCHFCcJdczt70xU by futurebird@sauropods.win
2026-02-06T10:06:42Z
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@ehproque % is mod and // is floor and they make the world go round.
(DIR) Post #B32cIhxcCPeHasx6RM by sleet01@fosstodon.org
2026-02-06T10:07:49Z
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@futurebird I've been calling it "integer division" but apparently it's actually "floor division" and I've just been lucky enough to never use it on a negative number?
(DIR) Post #B32cL6HwifqncnbQg4 by ehproque@neopaquita.es
2026-02-06T10:08:17Z
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@futurebird % I knew how to use before I knew what a derivative was, but // has always been a comment to me
(DIR) Post #B32cU1ZnbliLcJCzmS by joelvanderwerf@mastodon.social
2026-02-06T10:09:52Z
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@futurebird Two thirds of an Apple ///?
(DIR) Post #B32cVy6vSrVxRnd94i by futurebird@sauropods.win
2026-02-06T10:10:16Z
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@ehproque I program in flavors of java every day and use // for comment, but somehow forgot that. I guess floorDiv() is fine. Seems wordy IDK.
(DIR) Post #B32cZL04onDhJ527uq by iris@neuromatch.social
2026-02-06T10:10:50Z
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@futurebird I think integer division or quotient.
(DIR) Post #B32caHEyHZb3w4RqBU by ehproque@neopaquita.es
2026-02-06T10:11:01Z
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@futurebird do you know how to get pi in c++?
(DIR) Post #B32cdx733ijUfWUjUO by llewelly@sauropods.win
2026-02-06T10:11:41Z
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@futurebird a comment
(DIR) Post #B32cgmTn37uEYjTrjU by futurebird@sauropods.win
2026-02-06T10:12:13Z
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@ehproque um... not really. What do you do? load a math library?I mean, how much pi do we need? Just type out ten decimal places and make it a global.
(DIR) Post #B32d2om7CADY38Ymwa by bencurthoys@mastodon.social
2026-02-06T10:16:10Z
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@futurebird DIV and MOD. 16 DIV 5 = 316 MOD 5 = 1
(DIR) Post #B32d9UJjefVYd0SyBc by martok@mstdn.social
2026-02-06T10:17:21Z
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@futurebird I used to call it integer division until I learned that at least in Python it doesn't actually return an int.Now I just call it The Thing That Looks Like It Dooes What I Need But Better Stay Away From.
(DIR) Post #B32dFcaBpySY055Tai by ehproque@neopaquita.es
2026-02-06T10:18:29Z
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@futurebird nobody knows! There's like a zillion ways to do it because there isn't something like a "include <maths>maths::pi"
(DIR) Post #B32dGbleLys5lHuzQG by bencurthoys@mastodon.social
2026-02-06T10:17:36Z
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@futurebird a = (a DIV b) * b + (a MOD b)
(DIR) Post #B32dGd0viegjcy4hsW by futurebird@sauropods.win
2026-02-06T10:18:38Z
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@bencurthoys Would you say "a div b" if explaining it to a fifth grader?
(DIR) Post #B32dHp40P97NHw5Cwi by amenonsen@mastodon.social
2026-02-06T10:18:55Z
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@futurebird A comment 🏃♂️➡️
(DIR) Post #B32dJJTioCLxuKp2no by ehproque@neopaquita.es
2026-02-06T10:19:09Z
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@futurebird I mean, I'm an engineer, int pi=3
(DIR) Post #B32dK9wviqcAdyt6Y4 by futurebird@sauropods.win
2026-02-06T10:19:16Z
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@amenonsen GET OUT
(DIR) Post #B32dMf3L3Gq5gk4uYa by futurebird@sauropods.win
2026-02-06T10:19:47Z
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@ehproque Making it an int is EXTRA offensive. I could forgive float pi=3
(DIR) Post #B32dSZAlpKFrBmN0xE by ehproque@neopaquita.es
2026-02-06T10:20:49Z
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@futurebird but then I can't just divide an int by it and get the result into an int!
(DIR) Post #B32eWlN4W0cU8NgmuG by darkling@mstdn.social
2026-02-06T10:32:45Z
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@futurebird I'd call it an integer divide, I think.
(DIR) Post #B32fCQKD9e6Z1VDTYe by bencurthoys@mastodon.social
2026-02-06T10:40:19Z
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@futurebird I'd say "division with remainder" if explaining it to a child. "Sixteen divided by five is three remainder one". But my first computer - a BBC Model B - had DIV and MOD operatorshttps://www.bbcbasic.co.uk/bbcwin/tutorial/chapter05.htmland I was comfortable using them towards the tail end of primary school.
(DIR) Post #B32hvFqNAc8hSJlSN6 by khleedril@cyberplace.social
2026-02-06T11:10:47Z
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@futurebird I have no idea what this even means, but I call it "Slash, slash."
(DIR) Post #B32hxcmuppidCAHGtM by khleedril@cyberplace.social
2026-02-06T11:08:46Z
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@ehproque @futurebird I'm an astronomer. Let's call it ten for now...
(DIR) Post #B32hxdyePghSsqm9p2 by futurebird@sauropods.win
2026-02-06T11:11:16Z
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@khleedril @ehproque **muffled whimpering**stoooop
(DIR) Post #B32i1R0uYN8npudmTI by futurebird@sauropods.win
2026-02-06T11:11:58Z
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@khleedril You and the whole fifth grade.
(DIR) Post #B32kLbGYLSSLKihTl2 by david_chisnall@infosec.exchange
2026-02-06T11:38:00Z
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@futurebird I can't read this and not interpret // as a start-of-line-comment marker. So this line is just 16. And I call 16 an integer.
(DIR) Post #B32mYkfisvvKB6s90C by jonathanhogg@mastodon.social
2026-02-06T12:02:47Z
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@futurebird Years ago I got offered "show your Python skills" quiz on LinkedIn and the answer to this question was given as "integer division". I was so furious I put in a complaint. It is, of course, "floor division". And Python-style modulus is the One True '%' operator –C's remainder can get in the bin.
(DIR) Post #B32nJ0fXjxtZ74qUts by yonder@spacey.space
2026-02-06T11:52:37Z
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@ehproque I still like to...#define PI 3.14159265358979it feels artisan. bespoke. handwoven@futurebird
(DIR) Post #B32nJ26WP94NZ2TYae by futurebird@sauropods.win
2026-02-06T12:11:07Z
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@yonder @ehproque no no no THIS is "hand crafted" ... only the finest pi made of the most dubious loops. import randomimport mathinside=0.0resolution=60000for i in range(resolution): x,y = random.random(),random.random() if math.sqrt(x*x+y*y)<1: inside+=1 pi=4*inside/resolutionprint(pi)
(DIR) Post #B32nSFDL20ngpX3YzQ by futurebird@sauropods.win
2026-02-06T12:12:51Z
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@yonder @ehproque importing math feels very goofy. I should write a square root finder to avoid that. How do those go? It's like newton's method I think.
(DIR) Post #B32nXgl03SxxhWOhkG by futurebird@sauropods.win
2026-02-06T12:13:50Z
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@yonder @ehproque And now that I think about it, we don't need random either, just make it an grid, if it's fine enough it should be OK, right?
(DIR) Post #B32nwwLzCjRnJQjqAi by darkling@mstdn.social
2026-02-06T12:18:22Z
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@futurebird @yonder @ehproque Newton's method converges wonderfully quickly, so it's often a good place to start. I believe that CORDIC algorithms can also do square roots (although I haven't seen or derived one myself) -- those can be nicer for implementation if you don't have an FPU (or are building one), because they tend to be all about adds and bit-shifts and not much else.CORDIC only generates one digit per iteration, though, whereas Newton doubles the precision each time.
(DIR) Post #B32o1DZd7eorsU9yjI by burnitdown@beige.party
2026-02-06T12:19:07Z
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@ehproque @futurebird i need more pi
(DIR) Post #B32oK1TaKCnhrOIcBk by gbargoud@masto.nyc
2026-02-06T12:22:32Z
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@yonder @ehproque @futurebird Can random.random() be stuck in a constexpr to do that at compile time or did someone rightfully shoot down the idea of compile time nonsererminism?
(DIR) Post #B32pXZznORiWdhOThI by futurebird@sauropods.win
2026-02-06T12:36:13Z
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We don't need any random numbers to be THIS terrible. def root(n, tolerance=0.00001): if n==0: return 0 g = n/2 while 1==1: save = g g = 0.5 * (save + n / save) if abs(g - save) < tolerance: break return ginside=0.0resolution=100for x in range(resolution): x=x/resolution for y in range(resolution): y=y/resolution if root(x*x+y*y)<1: inside+=1pi=4*inside/(resolution*resolution)print(pi)
(DIR) Post #B32smPHhnbD3cqX5kG by futurebird@sauropods.win
2026-02-06T13:12:25Z
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@daniel OMG You know, when I started writing this I had that in mind and just forgot about it... LMAO.
(DIR) Post #B32wxjRXacLL9GmyGG by llewelly@sauropods.win
2026-02-06T13:58:54Z
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@c0dec0dec0de @futurebird imagine you descended to the basement of a strange building, and suddenly found yourself stuck to the ceiling. Such is the world of programming when not everyone agrees on the meaning of floor() ... *sigh*
(DIR) Post #B32xq1Ol368STNNHF2 by oblomov@sociale.network
2026-02-06T14:09:03Z
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@futurebird integer divide. Floor divide may or may not be appropriate for negative operands depending on how it is defined.
(DIR) Post #B3378hLohyBTO0ymYa by knord@mastodon.social
2026-02-06T15:53:22Z
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@futurebird @yonder @ehproque the pi of monte carlo
(DIR) Post #B33OsKW3dcxL6h78MK by mansr@society.oftrolls.com
2026-02-06T19:12:05Z
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@futurebird C programmers call that a comment.