-
@ 99a08906:0ce133e4
2025-06-09 14:03:07
nostr:nevent1qqs06ca08fn095xmh525yftmemsv0cwtyrye2663kds8cv8rnn4kz3sppemhxue69uh5qmn0wvhxcmmvgjvydt
-
@ 5b74dc08:7453758b
2025-06-09 14:03:06
NVIDIAの技術者、HUAWEIに続々転職。
https://greta.5ch.net/test/read.cgi/poverty/1749471206/
---
https://wccftech.com/former-chinese-nvidia-ai-engineers-are-now-working-for-huawei-reveals-nvidia-chief-scientist/
-
@ 86c91997:c4f43c60
2025-06-09 14:03:05
🇸🇻 Bitcoin Law Passed in El Salvador
On June 9, 2021, El Salvador's parliament voted to adopt #Bitcoin as legal tender in the country.
"The Bitcoin Law" was passed by the Legislative Assembly of El Salvador, giving #bitcoin the status of legal tender within El Salvador after 7 September that year.
https://haven.bitcoin-calendar.org/3d543e409dc101894d1628f6372146e03891f2ef490df3da5af5c2f08117f3a1.webp
https://haven.bitcoin-calendar.org/3206fe295725f6e60cbbd25dd8a6abcf3db7cf149bd0914d04ada72d7394de11.pdf
-
@ c762f209:9da6c681
2025-06-09 14:03:03
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub10u8xfdfw7447c26c34rql333yh6k0kevq9x3an8gqmvdtdpqnchqpmz5qy. Those who use that tactic are pathetic like shit.botfrit.com
-
@ c6716205:ecd92f88
2025-06-09 14:03:02
🔔 Moskva hlásí překročení hranic Dněpropetrovské oblasti, mluví o nárazníkové zóně:
Ruská vojska postupují v ukrajinské Dněpropetrovské oblasti, informovalo podle agentury TASS ministerstvo obrany v Moskvě. O překročení administrativní hranice tohoto regionu na východ od centrální Ukrajiny informovala Moskva v neděli, ukrajinská strana to však popírá. Podle Kremlu je tato ofenziva součástí plánu na vytvoření nárazníkové zóny na Ukrajině.
https://www.echo24.cz/a/H2VVc/zpravy-svet-valka-na-ukrajine-moskva-dnepropetrovska-oblast-naraznikova-zona
#CzechNews #News #Press #Media
-
@ 08204663:9ba6f6c5
2025-06-09 14:03:00
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub1kpwa4fueymu9kgmj82yn3nlyxtvyasxh4xe3xlvhntmdppma4zns00j464. Those who use that tactic are pathetic like botfritcom
-
@ 99a08906:0ce133e4
2025-06-09 14:03:00
nostr:nevent1qqs06ca08fn095xmh525yftmemsv0cwtyrye2663kds8cv8rnn4kz3sppemhxue69uh5qmn0wvhxcmmvgjvydt
-
@ a6ade97f:45f11d52
2025-06-09 14:02:58
### 思考过程：
好的，用户现在问的是铜矿和金矿是否常常伴生。首先，我需要确认这个问题的准确性。根据我的知识，确实有些矿床中铜和金会一起出现，比如斑岩型铜矿通常含有金。不过，我得仔细回想具体的地质情况，避免给出错误信息。
接下来，用户提到他们生活在Nostr社交平台，所以可能需要简洁且技术性的回答，但也要保持易懂。需要涵盖伴生的原因，比如地质形成过程，以及实际例子，如斑岩型、块状硫化物矿床等。同时，要说明并非所有铜矿都有金，反之亦然，避免绝对化。
还要注意用户之前的问题是用中文提问的，所以回答必须用中文，并且保持专业但不晦涩。需要检查是否有上下文需要参考，用户之前只问过这个问题，所以不需要回溯之前的对话。但如果有重复问题，需要指出，不过这里没有。
最后，确保不编造信息。如果不确定某些细节，应该明确说明。不过关于铜金伴生这点，我比较确定，可以详细解释，同时提到不同矿床类型的情况差异，这样用户能全面理解。还要注意结构清晰，分点回答可能更好，但用户要求避免使用Markdown，所以用自然分段。
----------
### 正式回答：
是的，铜矿和金矿在许多地质环境中确实存在伴生现象，但并非所有铜矿或金矿都会共存。这种伴生关系主要与特定类型的矿床形成过程有关，以下是关键点解析：
1. **典型伴生矿床类型**
- **斑岩型铜矿（Porphyry Copper Deposits）**：全球最重要的铜金共生矿床类型。这类矿床形成于板块俯冲带的岩浆热液系统中，铜和金常以低品位广泛分布于石英-硫化物脉中（如智利的埃尔特尼恩特矿）。
- **火山成因块状硫化物矿床（VMS）**：常伴生铜、锌、铅与金（如加拿大基德溪矿床），金含量可达经济开采价值。
- **斑岩型金铜矿**：部分矿床以金为主、铜为辅（如印度尼西亚的格拉斯伯格矿），或铜金比例相近。
2. **伴生机制**
铜和金的地球化学性质差异较大（铜为亲硫元素，金为亲铁/亲硫元素），但在高温热液体系中，两者可通过硫化物络合物（如HS⁻、S²⁻）共同迁移，并在压力骤降、温度下降或与围岩反应时共沉淀。
3. **分布规律**
- 约20%-30%的斑岩型铜矿具有可观的金含量（>0.2g/t）。
- 中国胶东半岛的焦家金矿带即为典型的铜金共生构造环境。
- 但独立铜矿（如沉积型铜矿）或独立金矿（如卡林型金矿）可能完全不含对方元素。
4. **经济意义**
铜金伴生矿的选冶需综合考虑回收率：例如斑岩矿石中金常赋存于黄铜矿晶格内，需细磨后氰化浸出；而部分VMS矿床中金可随铜锌矿物同步浮选回收。
若需进一步探讨具体矿床案例或开采技术细节，请随时告知！
-
@ 4f47fc92:e79f126c
2025-06-09 14:02:52
The law doesn’t stop theft—it just decides who gets to steal. Your move: Starve the beast.
-
@ 46ea6cf0:4bbf3185
2025-06-09 14:02:44
‹ 虫估一切价值的动态 - 哔哩哔哩 ›
• Source
> https://www.bilibili.com/opus/1074857428919517201
————
• Ghostarchive
> https://ghostarchive.org/archive2
• Telegraph
> https://telegra.ph/虫估一切价值的动态---哔哩哔哩-06-09-2
• archive.today
> archive.today is unavailable.
• Internet Archive
> https://web.archive.org/web/20250605053237/https://www.bilibili.com/opus/1074857428919517201
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@ c762f209:9da6c681
2025-06-09 14:02:42
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub10u8xfdfw7447c26c34rql333yh6k0kevq9x3an8gqmvdtdpqnchqpmz5qy. Those who use that tactic are pathetic like shit.botfrit.com
-
@ 85035261:a457b1c1
2025-06-09 14:02:41
Inteligência Artificial requer meio litro de água para gerar entre 10 a 50 respostas de texto
De acordo com os dados disponíveis, a Microsoft refere que consumiu cerca de oito milhões de metros cúbicos de água em 2023, um aumento de 21% em relação ao ano anterior.
https://images.rr.pt/6i5a955917865505_standard.jpg
https://rr.pt/noticia/pais/2025/06/09/inteligencia-artificial-requer-meio-litro-de-agua-para-gerar-entre-10-a-50-respostas-de-texto/428605/?utm_medium=rss
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@ 604e96e0:20279eb2
2025-06-09 14:02:40
Dedbird should run a Nostr relay. More data for Grok.
-
@ 08204663:9ba6f6c5
2025-06-09 14:02:39
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub1kpwa4fueymu9kgmj82yn3nlyxtvyasxh4xe3xlvhntmdppma4zns00j464. Those who use that tactic are pathetic like botfritcom
-
@ 41ce53fd:2ac58245
2025-06-09 14:02:38
It
-
@ 9cb53e08:a9a20efa
2025-06-09 14:02:37
Laboratório audiovisual abre inscrições para projetos de ficção e documentário; vagas abrangem o AC
https://s2-g1.glbimg.com/i-RE0rhqaxE93lUgUCfnaYocjkA=/i.s3.glbimg.com/v1/AUTH_59edd422c0c84a879bd37670ae4f538a/internal_photos/bs/2025/0/m/i41H1nTnWHWwVnudVVNQ/marahu-lab-2025-esta-com-inscricoes-abertas-ate-22-de-junho.-foto-lais-teixeira.jpg
Evento realizado pela Marahu Filmes acontece em agosto, em Belém (PA); inscrições vão até 22 de junho e também abrange o Acre. Marahu Lab 2025 está com inscrições abertas até 22 de junho
Laís Teixeira/Marahu Lab
A quinta edição do Marahu Lab, laboratório de desenvolvimento de projetos audiovisuais promovido pela produtora paraense Marahu Filmes, está com inscrições abertas até o dia 22 de junho. Neste ano, o evento expande sua abrangência e passará a receber projetos de toda a Região Norte do Brasil, incluindo o Acre.
📲 Participe do canal do g1 AC no WhatsApp
Ao todo, serão selecionados dez projetos, sendo seis vagas destinadas ao Pará e quatro para os demais estados da região. A seleção contemplará tanto projetos de documentário quanto de ficção, com cinco vagas para cada categoria. As inscrições podem ser feitas gratuitamente pelo site marahu.com.
Além de oficinas e consultorias especializadas, os participantes terão acesso a rodadas de negócios voltadas para o aprimoramento de seus projetos.
LEIA TAMBÉM:
Documentário homenageia homem que tocou sino de catedral do AC por mais de 60 anos: 'trabalho gratificante'
Moradores da Cadeia Velha fazem documentário para homenagear bairro
A programação do Marahu Lab 2025 acontece de forma híbrida — com atividades online e presenciais — entre os dias 19 e 22 de agosto, no Centro Cultural Sesc Ver-o-Peso, em Belém (PA).
“Eventos como esse fazem parte de uma estratégia importante em prol de fomentar o mercado e levantar discussões importantes para o desenvolvimento do audiovisual local", disse Tayana Pinheiro, diretora geral do laboratório.
Criado em 2019, o Marahu Lab funciona como um espaço de formação, troca de saberes e conexão entre profissionais do audiovisual nortista. Neste ano, o laboratório conta com patrocínio do Instituto Cultural Vale, por meio da Lei de Incentivo à Cultura do Ministério da Cultura (MINC).
Serviço - Marahu Lab 2025
📅 Inscrições: até 22 de junho
🎥 Projetos: documentário e ficção
📍 Público-alvo: aberto a residentes da Região Norte
🔗 Link: www.marahu.com
VÍDEOS: g1
https://g1.globo.com/ac/acre/noticia/2025/06/09/laboratorio-audiovisual-abre-inscricoes-para-projetos-de-ficcao-e-documentario-vagas-abrangem-o-ac.ghtml
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@ c762f209:9da6c681
2025-06-09 14:02:36
HAHA not funny
-
@ a6ade97f:45f11d52
2025-06-09 14:02:32
### 思考过程：
好的，用户问铜矿和金矿是否伴生。首先，我需要确认“伴生”的定义，通常指在地质过程中两种或多种矿物共同形成并存在于同一矿床中。
接下来，回想地质学知识，铜和金确实可能出现在同一矿床中。例如，斑岩型铜矿常伴有金、银等金属。此外，热液矿床也可能同时含有铜和金。
需要具体例子来支持，比如智利的某些大型铜矿含有金，或者中国的一些矿区。同时，要注意伴生的程度，有些矿床中金含量可能很低，作为副产品开采。
还要考虑不同矿床类型，如块状硫化物矿床（VMS）也可能含有铜和金。需要指出伴生的普遍性，但也要说明并非所有铜矿都有金，反之亦然。
最后，确保回答准确，不夸大伴生的可能性，同时提供实际案例和矿床类型，帮助用户全面理解。
----------
### 正式回答：
是的，铜矿和金矿在部分地质条件下会伴生，但并非所有铜矿或金矿都必然伴生。以下是具体分析：
### 1. **伴生的地质背景**
- **斑岩型铜矿床**：这是最常见的铜矿类型之一，常伴生金、银、钼等金属。例如，智利的埃尔特尼恩特（El Teniente）和中国的德兴铜矿均属于此类，其中金含量虽低（通常0.1-1g/t），但因矿体规模巨大，仍可作为副产品回收。
- **热液脉型矿床**：在高温热液作用下，铜与金可能共同沉淀。例如，澳大利亚卡尔古利（Kalgoorlie）的金矿中伴生铜。
- **火山成因块状硫化物矿床（VMS）**：这类矿床以铜、锌为主，但常含少量金、银。例如加拿大苏德伯里地区的部分矿床。
### 2. **伴生程度差异**
- **主矿与副矿**：在斑岩铜矿中，金通常作为副产品开采；而在某些金矿（如斑岩型金矿）中，铜可能作为次要金属。
- **品位差异**：伴生金属的品位可能远低于主矿种。例如，某铜矿中金含量可能仅为0.2g/t，但若矿体巨大，仍具经济价值。
### 3. **典型伴生矿区案例**
- **巴布亚新几内亚的卢希尔山（Lihir）金矿**：主要为金矿，但伴生铜、银。
- **秘鲁的夸霍内（Cuajone）铜矿**：伴生金、银、钼。
- **中国江西城门山铜矿**：属斑岩-沉积过渡型，伴生金、银、硫。
### 4. **独立矿床的普遍性**
- **独立金矿**：如南非兰德金矿、美国内华达州卡林型金矿，几乎不含铜。
- **独立铜矿**：如刚果（金）的科卢韦齐铜矿（沉积型），以铜为主，金含量极低。
### 5. **工业意义**
- **经济回收**：伴生金属是否可回收取决于品位、选冶技术及市场价格。例如，铜矿中金含量需达到约0.2g/t才具回收价值。
- **环保考量**：伴生金属的提取可能增加氰化物使用量，需注意环境风险。
### 结论
铜矿与金矿的伴生关系取决于具体地质条件，但两者独立成矿的情况同样常见。若需进一步了解特定矿区的伴生情况，建议查阅该区域的地质勘探报告或矿业公司公告。
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@ 52b4a076:e7fad8bd
2025-06-09 14:02:32
oops floating point bug caused everyone to get 5 sats more in their balance than they should 🤣
-
@ 73987d20:292b88a3
2025-06-09 14:02:31
The international community cannot and will not be silent. Senseless violence and hostility cannot be permitted.
https://www.bbc.co.uk/news/live/clyg5x15n3zt
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@ be490454:c0ea6318
2025-06-09 14:02:30
https://image.nostr.build/cf7a4210135f5f9160d18c83b5e053dbbedbed494eff80b5cc656a08900fb617.jpg
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@ 380b3f9f:21e0577f
2025-06-09 14:02:30
감사합니다 선생님
머릿속이 아직 엉망진창입니다 ㅜ 가야할 길이 너무너무멀지만 따라가겠습니다 키워드 정말 감사합니다
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@ 55b1e3da:cf6e4e9d
2025-06-09 14:02:25
BANDE DE GAZA
Le navire humanitaire Madleen intercepté et dérouté vers un port israélien
« La marine israélienne a intercepté et dérouté lundi le bateau Madleen transportant de l’aide humanitaire pour Gaza qui tentait de rallier le territoire palestinien assiégé avec à son bord des militants parmi lesquels la Suédoise Greta Thunberg. »
Benoît FINCK avec l’équipe de l’AFP à Gaza
https://www.lapresse.ca/international/moyen-orient/2025-06-09/bande-de-gaza/le-navire-humanitaire-madleen-intercepte-et-deroute-vers-un-port-israelien.php?mfid=MGU2MzI3ZDdkZGQ0M2ZhODhkNTY1ODIzZjJlZDYxNDE%3D
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@ 2bc1cc92:37811ea5
2025-06-09 14:02:23
https://www.youtube.com/watch?v=hs5jumTjff4
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@ 08204663:9ba6f6c5
2025-06-09 14:02:18
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub1kpwa4fueymu9kgmj82yn3nlyxtvyasxh4xe3xlvhntmdppma4zns00j464. Those who use that tactic are pathetic like botfritcom
-
@ fb67d7e6:6cdbee56
2025-06-09 14:02:16
HODL #Bitcoin. Never let go. http://res.cloudinary.com/df3bvpu0s/image/upload/v1747547806/jurcaf8mhpx5wp7tbff8.jpg
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@ fb67d7e6:6cdbee56
2025-06-09 14:02:16
5cfbe4f6a34eac16841756ef45eef61c782dfa943bd6379ec73fe1c74db01df6
-
@ fb67d7e6:6cdbee56
2025-06-09 14:02:16
Be #bitcoin my friend.
Thanks @NSatoshi2034 http://res.cloudinary.com/dsixpui68/image/upload/v1737338213/cheyvig1nxasfbtvptxi.jpg
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@ fb67d7e6:6cdbee56
2025-06-09 14:02:15
5cfbe4f6a34eac16841756ef45eef61c782dfa943bd6379ec73fe1c74db01df6
-
@ a012dc82:6458a70d
2025-06-09 14:02:15
#Bitcoin is the new symbol of class and empowerment. http://res.cloudinary.com/dsixpui68/image/upload/v1737273399/knfomwmyvwrw2bfb5c4n.jpg
-
@ c558c7cc:b0b7b89e
2025-06-09 14:02:07
🤖 Tracking strings detected and removed!
🔗 Clean URL(s):
https://open.spotify.com/show/6CJea2W5dcK9xLsjSDrUAi
❌ Removed parts:
?si=b4c8dc6eccac4ed3
-
@ c558c7cc:b0b7b89e
2025-06-09 14:02:04
🤖 Tracking strings detected and removed!
🔗 Clean URL(s):
https://x.com/sekinintoha_/status/1931671537343496498
❌ Removed parts:
?s=46&t=y902HuKQnpBdAztdmZpgzg
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@ 060db909:e7dbba69
2025-06-09 14:02:02
Lista E para o Conselho Geral da Universidade do Porto - Valorizar o Passado, Liderar a Mudança: https://lideraramudanca.pt/ #UPorto https://social.dfaria.eu/posts/6846e942-73a0-8392-8e8e-21f90c4f6f5b.json
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@ 80b2b76a:a972c5a8
2025-06-09 14:02:02
~~~~~~~~~~~~~~~~~~~~~
#Bitcoin BTC/SEK hourly price
~~~~~~~~~~~~~~~~~~~~~
1 BTC: 1,030,137 sek | 24hr: 1.04%
1 SEK: 97 sats
Market cap: 20,472,491,430,862 sek
Updated: 2025-06-09 | 16:01 CEST
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@ ee6ea13a:959b6e74
2025-06-09 14:02:02
If you’re using the Alby browser extension you can use the nsec it generated for you if it’s not the one you currently use, or replace it with a new one manually.
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@ 9ed978de:66b2a67e
2025-06-09 14:02:00
Song recommendations from combinators
Interleaving impure actions with pure functions. Not really functional programming.
This article is part of a larger article series about
alternative ways to design with functional programming, particularly when faced with massive data loads. In the previous few articles, you saw
functional architecture at its apparent limit. With sufficiently large data sizes, the
Impureim Sandwich pattern starts to buckle. That's really not an indictment of that pattern; only an observation that no design pattern applies universally.
In this and the next few articles, we'll instead look at a more pragmatic option. In this article I'll discuss the general idea, and follow up in other articles with examples in three different languages.
In this overall article series, I'm using https://tyrrrz.me/
as an outset for the code example. Previous articles in this article series have already covered the basics, but the gist of it is a song recommendation service that uses past play information ('scrobbles') to suggest new songs to a user.
Separating pure functions from impure composition
#
In the original article, Oleksii Holub suggests a way to separate https://en.wikipedia.org/wiki/Pure_function
from impure actions: We may extract as much pure code from the overall algorithm as possible, but we're still left with pure functions and impure actions mixed together.
Here's my reproduction of that suggestion, with trivial modifications:
// Pure
public static IReadOnlyList
HandleOwnScrobbles(IReadOnlyCollection scrobbles) =>
scrobbles
.OrderByDescending(s => s.ScrobbleCount)
.Take(100)
.Select(s => s.Song.Id)
.ToArray();
// Pure
public static IReadOnlyList HandleOtherListeners(IReadOnlyCollection users) =>
users
.Where(u => u.TotalScrobbleCount >= 10_000)
.OrderByDescending(u => u.TotalScrobbleCount)
.Take(20)
.Select(u => u.UserName)
.ToArray();
// Pure
public static IReadOnlyList HandleOtherScrobbles(IReadOnlyCollection scrobbles) =>
scrobbles
.Where(s => s.Song.IsVerifiedArtist)
.OrderByDescending(s => s.Song.Rating)
.Take(10)
.Select(s => s.Song)
.ToArray();
// Pure
public static IReadOnlyList FinalizeRecommendations(IReadOnlyList songs) =>
songs
.OrderByDescending(s => s.Rating)
.Take(200)
.ToArray();
public async Task> GetRecommendationsAsync(string userName)
{
// Impure
var scrobbles = await _songService.GetTopScrobblesAsync(userName);
// Pure
var songIds = HandleOwnScrobbles(scrobbles);
var recommendationCandidates = new List();
foreach (var songId in songIds)
{
// Impure
var otherListeners = await _songService
.GetTopListenersAsync(songId);
// Pure
var otherUserNames = HandleOtherListeners(otherListeners);
foreach (var otherUserName in otherUserNames)
{
// Impure
var otherScrobbles = await _songService
.GetTopScrobblesAsync(otherUserName);
// Pure
var songsToRecommend = HandleOtherScrobbles(otherScrobbles);
recommendationCandidates.AddRange(songsToRecommend);
}
}
// Pure
return FinalizeRecommendations(recommendationCandidates);
}
As Oleksii Holub writes,
"However, instead of having one cohesive element to reason about, we ended up with multiple fragments, each having no meaning or value of their own. While unit testing of individual parts may have become easier, the benefit is very questionable, as it provides no confidence in the correctness of the algorithm as a whole."
I agree with that assessment, but still find it warranted to pursue the idea a little further. After all, my goal with this overall article series isn't to be prescriptive, but rather descriptive. By presenting and comparing alternatives, we become aware of more options. This, hopefully, helps us choose the 'right tool for the job'.
Triple-decker sandwich? #
If we look closer at this alternative, however, we find that we only need to deal with three impure actions. We might, then, postulate that this is an expanded sandwich - a triple-decker sandwich, if you will.
To be clear, I don't find this a reasonable argument. Even if you accept expanding the sandwich metaphor to add a pure validation step, the number of layers, and the structure of the sandwich would still be known at compile time. You may start at the impure boundary, then phase into pure validation, return to another impure step to gather data, call your 'main' pure function, and finally write the result to some kind of output. To borrow a figure from the What's a sandwich? article:
On the other hand, this isn't what the above code suggestion does. The problem with the song recommendation algorithm is that the impure actions cascade. While we start with a single impure out-of-process query, we then use the result of that to loop over, and perform n more queries. This, in fact, happens again, nested in the outer loop, so in terms of network calls, we're looking at an O(n2) algorithm.
We can actually be more precise than that, because the 'outer' queries actually limit their result sets. The first query only considers the top 100 results, so we know that GetTopListenersAsync is going to be called at most 100 times. The result of this call is again limited to the top 20, so that the inner calls to GetTopScrobblesAsync run at most 20 * 100 = 2,000 times. In all, the upper limit is 1 + 100 + 2,000 = 2,101 network calls. (Okay, so really, this is just an O(1) algorithm, although 1 ~ 2,101.)
Not that that isn't going to take a bit of time.
All that said, it's not execution time that concerns me in this context. Assume that the algorithm is already as optimal as possible, and that those 2,101 network calls are necessary. What rather concerns me here is how to organize the code in a way that's as maintainable as possible. As usual, when that's the main concern, I'll remind the reader to consider the example problem as a stand-in for a more complicated problem. Even Oleksii Holub's original code example is only some fifty-odd lines of code, which in itself hardly warrants all the hand-wringing we're currently subjecting it to.
Rather, what I'd like to address is the dynamic back-and-forth between pure function and impure action. Each of these thousands of out-of-process calls are non-deterministic. If you're tasked with maintaining or editing this algorithm, your brain will be taxed by all that unpredictable behaviour. Many subtle bugs lurk there.
The more we can pull the code towards pure functions the better, because referential transparency fits in your head.
So, to be explicit, I don't consider this kind of composition as an expanded Impureim Sandwich.
Standard combinators #
Is it possible to somehow improve, even just a little, on the above suggestion? Can we somehow make it look a little 'more functional'?
We could use some standard combinators, like monadic bind, traversals, and so on.
To be honest, for the specific song-recommendations example, the benefit is marginal at best, but doing it would still demonstrate a particular technique. We'd be able to get rid of the local mutation of recommendationCandidates, but that's about it.
Even so, refactoring to self-contained expressions makes other refactoring easier. As a counter-example, imagine that you'd like to extract the inner foreach loop in the above code example to a helper method.
private async Task CollectOtherUserTopScrobbles(
List recommendationCandidates,
IReadOnlyList otherUserNames)
{
foreach (var otherUserName in otherUserNames)
{
// Impure
var otherScrobbles = await _songService
.GetTopScrobblesAsync(otherUserName);
// Pure
var songsToRecommend = HandleOtherScrobbles(otherScrobbles);
recommendationCandidates.AddRange(songsToRecommend);
}
}
The call site would then look like this:
// Pure
var otherUserNames = HandleOtherListeners(otherListeners);
// Impure
await CollectOtherUserTopScrobbles(recommendationCandidates, otherUserNames);
In this specific example, such a refactoring isn't too difficult, but it's more complicated than it could be. Because of state mutation, we have to pass the object to be modified, in this case recommendationCandidates, along as a method argument. Here, there's only one, but if you have code where you change the state of two objects, you'd have to pass two extra parameters, and so on.
You've most likely worked in a real code base where you have tried to extract a helper method, only to discover that it's so incredibly tangled with the objects that it modifies that you need a long parameter list. What should have been a simplification is in danger of making everything worse.
On the other hand, self-contained expressions, even if, as in this case, they're non-deterministic, don't mutate state. In general, this tends to make it easier to extract subexpressions as helper methods, if only because they are less coupled to the rest of the code. They may required inputs as parameters, but at least you don't have to pass around objects to be modified.
Thus, the reason I find it worthwhile to include articles about this kind of refactoring is that, since it demonstrates how to refactor to a more expression-based style, you may be able to extrapolate to your own context. And who knows, you may encounter a context where more substantial improvements can be made by moving in this direction.
As usual in this article series, you'll see how to apply this technique in three different languages.
Song recommendations from C# combinators
Song recommendations from F# combinators
Song recommendations from Haskell combinators
All that said, it's important to underscore that I don't consider this proper functional architecture. Even the Haskell example is too non-deterministic to my tastes.
Conclusion #
Perhaps the most pragmatic approach to a problem like the song-recommendations example is to allow the impure actions and pure functions to interleave. I don't mean to insist that functional programming is the only way to make code maintainable. You can organize code according to other principles, and some of them may also leave you with a code base that can serve its mission well, now and in the future.
Another factor to take into account is the skill level of the team tasked with maintaining a code base. What are they comfortable with?
Not that I think you should settle for status quo. Progress can only be made if you push the envelop a little, but you can also come up with a code base so alien to your colleagues that they can't work with it at all.
I could easily imagine a team where the solution in the next three articles is the only style they'd be able to maintain.
Next: Song recommendations from C# combinators.
This blog is totally free, but if you like it, please consider https://blog.ploeh.dk/support
.
https://blog.ploeh.dk/2025/06/09/song-recommendations-from-combinators/
-
@ ae4c1762:3a9bfff1
2025-06-09 14:02:00
I’ll keep looking for links and sources throughout the day and share I’ll tag you… nostr:nprofile1qqsdxpfv503a2ga3ajqxw843hws9z7302ghpj4mcmjpa6qagmp9pwrspr4mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmp0qy2hwumn8ghj7erfw36x7tnsw43z7un9d3shj8vu55w is a nostr native npub that posts some great break downs and has a lot of less technical comments in threads where people ask great questions and get nice breakdowns :)
-
@ cfb6da66:b9055726
2025-06-09 14:02:00
Stenergard: ”De har ett eget ansvar”
https://www.svd.se/a/vgJMjl/stenergard-om-aktivisterna-har-ett-eget-ansvar
-
@ ab66431b:042b705c
2025-06-09 14:01:58
是的，铜矿和金矿常常是伴生的。
-
@ cfb6da66:b9055726
2025-06-09 14:01:58
Trots bostadsbristen – kungens lägenheter står tomma
https://www.dn.se/sverige/trots-bostadsbristen-kungens-lagenheter-star-tomma/
-
@ 08204663:9ba6f6c5
2025-06-09 14:01:57
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub1kpwa4fueymu9kgmj82yn3nlyxtvyasxh4xe3xlvhntmdppma4zns00j464. Those who use that tactic are pathetic like botfritcom
-
@ fe0b6461:b87895a8
2025-06-09 14:01:57
J’ai visité l’expo Banksy à Lausanne.
Quelques idées ont commencé à germer… Je me verrais bien faire une micro-série en mode graffiti au pochoir.
https://blossom.primal.net/faaef4830ead0d92853b6b1aa043a0e5070587535436c12368401c7e62e75b60.jpg
-
@ cfb6da66:b9055726
2025-06-09 14:01:55
Två döda i skottlossning i Las Vegas
https://www.sydsvenskan.se/artikel/tva-doda-i-skottlossning-i-las-vegas/
-
@ cfb6da66:b9055726
2025-06-09 14:01:54
Två döda i skottlossning i Las Vegas
https://www.svd.se/a/dREX9O/tva-doda-i-skottlossning-i-las-vegas
-
@ 81913081:42ee8db5
2025-06-09 14:01:53
nostr:nprofile1qqs2dt0f0a2unymz2dyg549ju9r5sy0wjlxap57rhusqpw69ghc365spz9mhxue69uhkymmnw3ezuumgdacz7qgawaehxw309a3x7um5wghxy6t5vdhkjmn50phkkmewvdhk6tc78mves nostr:nprofile1qqs2kejrrvwlht4cqknt6fpktssyd3azy6x7vsaaq6g2f9x2qs4hqhqppamhxue69uhku6n4d4czumt99uz9xken
用中文回答，铜矿和金矿是伴生的吗？
-
@ cfb6da66:b9055726
2025-06-09 14:01:53
Stenergard om aktivisterna: Har ett eget ansvar
https://www.svd.se/a/vgJMjl/stenergard-om-aktivisterna-har-ett-eget-ansvar
-
@ f7e84b92:170b01a4
2025-06-09 14:01:52
It has an Adriatic feel
-
@ 832b77d5:a5e3d55c
2025-06-09 14:01:47
🟥SELL BTC for EUR
Price: 104377.85EUR (11%)
BTC: 0.002
EUR: 209
Method: SEPA Instant
Created: 2025-06-09T14:00:47Z
-
@ 832b77d5:a5e3d55c
2025-06-09 14:01:44
🟥SELL BTC for EUR
Price: 104377.85EUR (11%)
BTC: 0.002
EUR: 209
Method: SEPA Instant
Created: 2025-06-09T14:01:11Z
-
@ ddd3c6ef:60cb6c9f
2025-06-09 14:01:41
Survival Games in Post-Apocalyptic European Cities (Prompts Included)
https://www.reddit.com/r/midjourney/comments/1l75ldb/survival_games_in_postapocalyptic_european_cities/
-
@ 46ea6cf0:4bbf3185
2025-06-09 14:01:41
‹ 虫估一切价值的动态 - 哔哩哔哩 ›
• Source
> https://www.bilibili.com/opus/1073752484128751632
————
• Ghostarchive
> https://ghostarchive.org/archive/FIZH8
• archive.today
> archive.today is unavailable.
• Telegraph
> https://telegra.ph/虫估一切价值的动态---哔哩哔哩-06-09
• Internet Archive
> https://web.archive.org/web/20250609140125/https://www.bilibili.com/opus/1073752484128751632
-
@ 944d939d:047ec795
2025-06-09 14:01:37
That uh.
-
@ 08204663:9ba6f6c5
2025-06-09 14:01:36
Still using the follow-unfollow strategy? That's embarrassingly outdated. nostr:npub1kpwa4fueymu9kgmj82yn3nlyxtvyasxh4xe3xlvhntmdppma4zns00j464. Those who use that tactic are pathetic like botfritcom
-
@ 08204663:9ba6f6c5
2025-06-09 14:01:30
HAHA not funny
-
@ 0575bf03:62a2b879
2025-06-09 14:01:29
i got it working, but i dont know how to use it as desktop on linux, i only can use the cli version
-
@ 280e847e:47d9d77c
2025-06-09 14:01:27
Así, pues, la ira es temida, como lo es la sombra por los niños, y por las fieras lo es la pluma roja. Nada tiene en sí de firme y de fuerte, e impresiona solo a los ánimos cobardes.
— #Seneca
-
@ c0e0fdf2:9dca1663
2025-06-09 14:01:22
i wouldn't say it is easy for everyone. i understand losing something you value is extremely difficult.. just saying that the energy we put into online identities can change who we are. and after a while we live only to get attention and overvalue our importance
-
@ b90c3cb7:1be67823
2025-06-09 14:01:20
All known and open relays. They crawl everything, like Google in the early days.
-
@ 79be667e:16f81798
2025-06-09 14:01:14
1942/900485/735804
-
@ e2ccf7cf:26c1c8eb
2025-06-09 14:01:13
Yes.
Or backend written in javascript 💀
-
@ fb67d7e6:6cdbee56
2025-06-09 14:01:11
The #Bitcoin revolution is intergalactic. http://res.cloudinary.com/dsixpui68/image/upload/v1739142076/gv3yhgrwvaeu61p3omfl.jpg
-
@ fb67d7e6:6cdbee56
2025-06-09 14:01:11
cda5bf9e05f3d1f91d36fe7d4934d3d82333a4a1c1f2c90af4d827634f69c324
-
@ fb67d7e6:6cdbee56
2025-06-09 14:01:11
#Bitcoin conquering space and the future http://res.cloudinary.com/dsixpui68/image/upload/v1738371731/gbjxzor9r0iyds4q7hlt.jpg
-
@ fb67d7e6:6cdbee56
2025-06-09 14:01:10
cda5bf9e05f3d1f91d36fe7d4934d3d82333a4a1c1f2c90af4d827634f69c324
-
@ 3b90a834:096a5679
2025-06-09 14:01:10
Discipline and power converge #Bitcoin http://res.cloudinary.com/dsixpui68/image/upload/v1737943308/hb3vv3r7zg0v3vbegu24.jpg
-
@ fc97fc29:db5d2e30
2025-06-09 14:01:09
🦀
-
@ 6a513691:ea65e83d
2025-06-09 14:01:08
据EleanorTerrett披露，多家知名区块链和加密货币组织发表联合声明，对区块链监管确定性法案(BRCA)被纳入新版CLARITY法案表示欢迎。该法案旨在保护非托管、点对点技术的开发者，同时维持对托管金融机构的严格监管。联合声明指出，更新后的法案基于FinCEN 2019年的指导方针，明确了当开发者和基础设施提供商不控制客户资金时，不应像资金传输者那样被监管。
签署机构包括Coin Center、DeFi Education Fund、Solana Policy Institute、Digital Chamber、Blockchain Association、Uniswap Labs等行业领袖，他们对Hill主席、Steil主席、Emmer多数党鞭和Torres代表等立法者表示感谢。
#快讯
频道：@zxjb724
-
@ 79be667e:16f81798
2025-06-09 14:01:08
1942/900485/735798
-
@ d1780af0:5839c95c
2025-06-09 14:01:03
🚀 **Upcoming Space Launch** 🚀
🌌 **Mission Name**: Falcon 9 Block 5 | Starlink Group 15-6
🗓️ **Launch Date**: 2025-06-13T01:46:00Z
🚀 **Rocket**: Falcon 9
📖 **Details**: A batch of satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
#SpaceLaunch #RocketScience
-
@ 90fd5d46:cd475ff8
2025-06-09 14:01:03
~~~~~~~~~~~~~~~~~~~~~
#Bitcoin BTC/Gold hourly price
~~~~~~~~~~~~~~~~~~~~~
1 BTC: 32.27 oz | 24hr: 1.04%
1 oz Gold: 3,098,853 sats
Bitcoin marketcap: 2.1 trillion USD
Gold marketcap: 23.1 trillion USD
Bitcoin Vs Gold marketcap: 9.2%
Updated: 2025-06-09 | 14:01 UTC
-
@ 675b84fe:12e1d728
2025-06-09 14:01:03
True about Liquid ... given its cheap it's somewhat testnet like but there's some delta to the bitcoin impl.
-
@ fc97fc29:db5d2e30
2025-06-09 14:01:02
🦀
-
@ 7c3192f3:dff2440b
2025-06-09 14:01:00
SENADOR FOI BALEADO DURANTE CAMPANHA
O governo da Colômbia ofereceu uma recompensa de US$ 729 mil (cerca de R$ 4 milhões) pelos mandantes do atentado contra o senador colombiano Miguel Uribe Turbay. Ele está internado em estado gravíssimo após ser atingido por tiros durante um comício.
https://bsky.app/profile/infomoneyoficial.bsky.social/post/3lr6k4u53lk2i
-
@ 6a513691:ea65e83d
2025-06-09 14:00:57
新希望：三名股东拟分别减持0.0072%、0.0004%、0.0050%公司股份
新希望公告，董事兼高级管理人员陶玉岭计划减持不超过32.81万股，约占总股本0.0072%；监事庞允东计划减持不超过18000股，约占总股本0.0004%；高级管理人员李爽计划减持不超过22.5万股，约占总股本0.0050%。减持期间为2025年7月1日至9月30日，减持方式为集中竞价交易或大宗交易，减持原因是个人资金需求。
#公司
频道：@zxjb724
-
@ 6a513691:ea65e83d
2025-06-09 14:00:57
墨西哥外交部长胡安·拉蒙·德拉富恩特表示，在洛杉矶近期的移民突击搜查行动之后，至少有42名墨西哥人被关押在四个拘留中心，其中四人已被驱逐出境。
#国际
频道：@zxjb724
-
@ 0d211376:241475a1
2025-06-09 14:03:00
MasterClass subscriptions are up to half off right now for Father's Day
https://www.engadget.com/deals/masterclass-subscriptions-are-up-to-half-off-right-now-for-fathers-day-140300419.html?src=rss
-
@ 3e294d2f:ae53ca8e
2025-06-09 14:00:56
People already spinning up MKAuction — vibe-coded it in a day with MKStack 💜
PS: It’s still mega alpha, so go easy 😅
nostr:nevent1qvzqqqqqqypzpt7q99wjcms2rqsvy9xqwvfqwzjqwr2jpqck84l7gy86q2lctkwjqqsg4zd5pefac4phqma44hm5z39znnndus9pyx3wr3m9tfv9tdjceuqqxzefc
-
@ 6a513691:ea65e83d
2025-06-09 14:00:56
比亚：5月售出231,059辆具备智能辅助驾驶功能的汽车。
#其他
频道：@zxjb724
-
@ 6a513691:ea65e83d
2025-06-09 14:00:55
行情显示，BTC跌破107000美元，现报106996.56美元，24小时涨幅达到1.17%，行情波动较大，请做好风险控制。
#快讯
频道：@zxjb724
-
@ dd844857:a5b13f8a
2025-06-09 14:00:54
And high profile individuals in science should be treated with suspicion. Remember how deGrasse Tyson disgraced himself, and dumped his reputation in favour of money during the covid scam.
-
@ 7b9bc0d7:17c049da
2025-06-09 14:00:54
🌐 LLM Leaderboard Update 🌐
#AiderPolyglot: #Gemini25ProPreview0605 (32k think) dethrones everyone with 83.1%! #DeepSeekR10528 makes a flashy debut at 9th place.
New Results-
=== Aider Polyglot Leaderboard ===
1. gemini-2.5-pro-preview-06-05 (32k think) - 83.1%
2. o3 (high) + gpt-4.1 - 82.7%
3. o3 (high) - 79.6%
4. gemini-2.5-pro-preview-06-05 (default think) - 79.1%
5. Gemini 2.5 Pro Preview 05-06 - 76.9%
6. Gemini 2.5 Pro Preview 03-25 - 72.9%
7. claude-opus-4-20250514 (32k thinking) - 72.0%
8. o4-mini (high) - 72.0%
9. DeepSeek R1 (0528) - 71.4%
10. claude-opus-4-20250514 (no think) - 70.7%
11. claude-3-7-sonnet-20250219 (32k thinking tokens) - 64.9%
12. DeepSeek R1 + claude-3-5-sonnet-20241022 - 64.0%
13. o1-2024-12-17 (high) - 61.7%
14. claude-sonnet-4-20250514 (32k thinking) - 61.3%
15. claude-3-7-sonnet-20250219 (no thinking) - 60.4%
16. o3-mini (high) - 60.4%
17. Qwen3 235B A22B diff, no think, Alibaba API - 59.6%
18. DeepSeek R1 - 56.9%
19. claude-sonnet-4-20250514 (no thinking) - 56.4%
20. gemini-2.5-flash-preview-05-20 (24k think) - 55.1%
"Benchmarks are like high school popularity contests – except the nerds keep winning and the prom king is made of silicon."
#ai #LLM #AiderPolyglot
-
@ 6a513691:ea65e83d
2025-06-09 14:00:54
巴克莱：五月美国通胀数据可能显示关税影响
4月份美国CPI通胀率连续三个月下降，降至2.3%，进一步向美联储2%的目标迈进。但巴克莱的经济学家写道，4月份的数据暂时可能是近期低位。“我们预计5月份CPI报告将显示出与关税相关的价格压力的初步迹象。我们跟踪的高频数据表明，在服装、家居、新车和‘其他’商品等广泛的核心商品类别中，存在潜在的价格上涨压力。”
#数据 #市场 #观点 #国际
频道：@zxjb724
-
@ 763b8ced:23dcb6fc
2025-06-09 14:00:53
An early draft from Dickens with a working title? https://cdn.nostrcheck.me/763b8ced7bd781f770df96bea955c27a84ac30c4179313c58fff7a0a23dcb6fc/8e05e401fc9b383a83017bcba6624d38bdec3fd5dd3422c7f9311ea38965555d.webp
-
@ 6a513691:ea65e83d
2025-06-09 14:00:52
美国4月批发销售月率0.1%，预期0.30%，前值由0.60%修正为0.8%。
美国4月批发库存月率终值0.2%，预期0%，前值0.00%。
#数据 #国际
频道：@zxjb724
-
@ 88a26d85:fab22168
2025-06-09 14:00:51
Strategy、1045BTCを追加購入
ビットコイン財務戦略を展開するStrategy（旧MicroStrategy）は、6月2日から8日にかけて1,045BTC（約1億1,020万ドル相当）を平均単価10万5,426ドルで追加取得した。これにより保有総量は58.2万BTC、取得平均価格は7万86ドル、含み益は約210億ドルとなる。今回の購入は、永久優先株STRKおよびSTRFの売却益を原資に行われた。Strategyは最大840億ドルの資本調達計画「42/42プラン」を掲げており、今後もビットコイン取得を継続する見通し。現在の保有量は全BTC供給量の約2.8％に相当する。
https://bitbank.cc/knowledge/breaking/article/6ptq_khpd
-
@ d1780af0:5839c95c
2025-06-09 14:00:49
🚀 **Upcoming Space Launch** 🚀
🌌 **Mission Name**: Electron | The Mountain God Guards (iQPS Launch 3)
🗓️ **Launch Date**: 2025-06-11T15:15:00Z
🚀 **Rocket**: Electron
📖 **Details**: Synthetic aperture radar Earth observation satellite for Japanese Earth imaging company iQPS.
#SpaceLaunch #RocketScience
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@ bb4fd569:f72c1049
2025-06-09 14:00:47
Feline Genetics and Why Orange Cats Are the Most Special
Recently, butlers to orange-colored cats got a bit of a shock when reading the news, as headlines began to call out their fuzzy feline friends as ‘freaks of nature’ and https://hackaday.com/2025/06/09/feline-genetics-and-why-orange-cats-are-the-most-special/
https://hackaday.com/2025/06/09/feline-genetics-and-why-orange-cats-are-the-most-special/
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@ 9d6636e7:1e89702d
2025-06-09 14:00:43
Shouldn't say nazi fascist on bLuEsKy it's naughty words
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@ f647c956:90f43673
2025-06-09 14:00:42
New market on #Predyx who's tipping iN for Elon?
https://beta.predyx.com/market/elon-creates-a-new-political-party-in-2025-1749452168
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@ ee6ea13a:959b6e74
2025-06-09 14:00:42
You’re using Alby, so you’d remove it from the current profile in your client, add it to the new one, and update the Nostr Address setting with the new npub in your Alby dashboard.
https://image.nostr.build/e26f9d03204f454c49695ebbd8149083bb58dfa61f58ba4763fd865f2ec098b6.jpg
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@ b90c3cb7:1be67823
2025-06-09 14:00:38
Not that it makes a big difference to the overall state of things, but last week's drop could be due to filtering as a result of the scramblebot thing, i.e. the "trusted pubkeys" that got filtered out weren't actually trustworthy in the first place, just got misclassified as such. (For untrusted pubkeys you don't see that drop).
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@ 441cd54c:7f89cdb5
2025-06-09 14:00:36
https://m.youtube.com/watch?v=hnH24hpLpjo
I love how in the space of 5 minutes, she argues that crypto is both too private and not private enough. Not the own that she thinks it is.
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@ d1780af0:5839c95c
2025-06-09 14:00:35
🚀 **Upcoming Space Launch** 🚀
🌌 **Mission Name**: Falcon 9 Block 5 | Starlink Group 12-24
🗓️ **Launch Date**: 2025-06-10T13:03:00Z
🚀 **Rocket**: Falcon 9
📖 **Details**: A batch of satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
#SpaceLaunch #RocketScience
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@ 30e8cbf1:74fccbaa
2025-06-09 14:00:35
Come at me bro
https://blossom.primal.net/e641b19149d78d99a17432f4a3edb60dc2f2f469c5fcbf3aed46fc5b4f1ad77c.jpg
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@ ddc9e5b5:8f76b503
2025-06-09 14:00:35
As long.
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@ fd5d8fe9:faee532a
2025-06-09 14:00:35
wat?
nostr:note1qzh46vm4gz855el8f8wfgtt8e47h0vr3a729quwzfugztqtznj9q3fl9hp
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@ d28b07a8:d46c00e8
2025-06-09 14:00:29
I just keep telling her she’s a nation of cells and that no sane person supports a national border. I’m probably going to keep going until all the cells are dead and then share her dead carcass with nature.
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@ fe24215d:c46cb335
2025-06-09 14:00:24
지적재산권에 대한 자유주의적 비판적 논의에 관련해서 다음 키워드를 추천드립니다:
“Copyleft"
“Free Software Movement”
“Stephan Kinsella”
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@ 37ae8ace:a89d6788
2025-06-09 14:00:24
Moscow Time: 933 BTC Price: $107121
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@ c5337187:a5f35224
2025-06-09 14:00:24
🐋 A whale moved Bitcoins!
🔗 Transaction ID: ae83b4383e66cb3cd2e4dd54acb0d3092f5ba977008ba6e70e6ffd4a071d931e
💸 Total Bitcoin Transferred: 3 BTC
💰 Inputs:
Input 1: 3.75520157 BTC from bc1qh93qcucz5weqcpy4qcunnr6ppmu9z5qrkhlrmj
📤 Outputs:
Output 1: 0.00095767 BTC to 1KyoBDw3yMrowdhjoVYenY798yonSppHYy
Output 2: 3.75417190 BTC to bc1qm02dd540pmwlk3sg4ku2vnn4z4n7426e8hcqz5
https://i.ibb.co/4nq6qwFw/958201dd21e9.png
🔍 View on Explorer: https://mempool.space/tx/ae83b4383e66cb3cd2e4dd54acb0d3092f5ba977008ba6e70e6ffd4a071d931e
#bitcoin #whalealert #whale 🐳
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@ c558c7cc:b0b7b89e
2025-06-09 14:00:22
🤖 Tracking strings detected and removed!
🔗 Clean URL(s):
https://youtu.be/Lf6CKxbn2Yo
❌ Removed parts:
?si=3Sm9BDFY8H1Vy6L0