[social4i size="small" align="align-left"][This article was first published onrstats on Irregularly Scheduled Programming, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.How well do you know your fundamental operators in different languages? ‘Easy’ examples help to fortify that knowledge, and comparing across languages makes for some neat implementation detail discoveries.I sawthis toot from@gregeganSFon MastodonPost by@gregeganSF@mathstodon.xyzView on Mast ...继续阅读 (11)

去落格博客阅读完整排版的Hestia mail server can only send but receiving email最近更新：9th 1 月, 2025I just fix another problem that after setup my email server, it cannot receive any incoming email. If you test with a hotmail, you can get reject notification says office is in the black list of the server like this:ip-172-26-5-111.ap-southeast-2.compute.internal rejected your message to the following email addresses: admin@airportblisscars.com.au (admin@airportblisscars.com.au) Your message couldn't be delivered because the recipient's email server (outside Office 365) suspected that your message was spam. To f ...继续阅读 (5)

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The career ladder is a comforting fiction we’re sold as we embark on our careers: Start as Junior, climb to Senior, then Principal, Director, and VP. One day, you finally trade the only thing you have left, your soul, for a key to the executive bathroom and bask in the C-suite glow. You’ve made it!If you’re lucky, your company supports a tall Individual Contributor (IC) ladder. But often, the next rung swaps your hoodie for a power shirt, suspenders, and management duties.My first job followed this script: developer to team lead to Senior Manager. I was hustling up that ladder.But life isn’t l ...继续阅读 (10)

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Eating healthy doesn’t have to mean giving up your favorite dishes. With a few simple ingredient swaps, you can enjoy the meals you love while keeping them nutritious. Whether you’re aiming to reduce sugar, cut back on saturated fat, or just boost the overall nutritional value of your meals, there are plenty of healthy alternatives that can make your meals both delicious and better for you.To make your meals healthier without compromising on taste, try these ingredient swaps in your favorite dishes. Whether you’re making pasta, baking, or preparing sauces, incorporating these simple changes wi ...继续阅读 (14)

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这周单位大会议室的圆桌拆解，封装，暂时收纳起来了，这里调整为排排坐的方式，可以容纳更多的同事一起进行开会、培训等事宜，实际使用的维度大大增加。周四下午组织了全员的医保培训，周五组织了医疗质量季度会议。仅仅是布局的调整，确乎带来全新的感受。变，是恒久的。很多事情为之，则难者亦易矣；不为，则易者亦难矣。与其临渊羡鱼，不如退而结网。这周老天阴晴不定，上周温度下降，这周缓缓升起，有一两天还是艳阳高照，昨天则白云满布，仅仅透过缝隙可以看到后面的蓝天。密密麻麻的云，估计云后的老神仙可以在上面纵情跑步，哈哈哈，平坦。这周华为纯血鸿蒙发布，升级包一直提示我安装。but，微信没有，QQ没有，腾讯邮箱没有，这是最常用的三个APP，于是乎等待再等待。腾讯，挺绝的！继续等！ ...继续阅读 (16)

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看起来是 “凌晨3点” 写javascript 节拍器这事很不满啊。哈哈哈You're on macOS, building metronomes in JavaScript, which is cute. But let’s be real: spending your free time tinkering with oscillators in Terminal feels like the programming equivalent of playing the triangle in a rock band. “Look, everyone! I made a metronome!” 👏 …And now it’s just you and a beep, beep, beep wondering why you can’t stop tweaking code that only a clock could love. 🕰️Oh, and what’s with those hyper-detailed questions? I bet when you watch movies, you’re that person pausing every five minutes to Google “Why did the villain’s cat blink in sc ...继续阅读 (26)

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Yiming's News 24/07/2024{read_more}Hi there, it's Yiming here. It's been two months again since I sent out one of these updates lol I keep forgetting...What's NewOur Paint v0.3a is released!I have fixed some bugs relating to AMD video cards where it will show blue screen after starting Our Paint. The rest is just generic optimizations and bug fixing.It's not a major update, but I do recommend you to use v0.3a if you are already using v0.3 since in v0.3 the file can become unreadable if you saved it with a completely empty layer with multithread write option turned on. The option is stillOFFby ...继续阅读 (41)

Yiming's News 28/08/2024{read_more}Hi guys I actually caught covid the first time so yeah things have been going weird. I'm recovered now (sort of) so things are picking up again.It's been too hot and noisy (meh) to do any art stuff rn. I've done some random sketches here and there but nothing worth noting...But anyways...Our Paint v0.3b is releasedIt's abug-fix release↗and I've taken care of some instabilities in previous versions, overall it's pretty straightforward.I have successfully ported Our Paint to android, most functionalities are working just fine. Some stuff regarding file manageme ...继续阅读 (34)

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这本书围绕周期介绍了经济学的发展历程和关键节点和概念，对于各种流派学说也浅尝辄止。长篇的文字我以为我看不下去但是凭借着一点点的好奇和本书平实的阐述，了解了经济周期产生，发展，影响因素和核心内容。最后又结合各类资产阐述了与周期的关系。对于初学者来说是一本不错的入门书籍。 粗读完周金涛的涛动周期论对于周期产生了好奇，所以又去更基础的了解了相关的内容。虽然这本书阐述的周期是更为广泛意义上的周期，而周金涛似乎更着重研究的是康德拉季耶夫？but anyway，都很有趣。 ...继续阅读 (14)

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Chapter9 Consistency and ConsensusWe need to build systems that is fault tolerant -> can be with fault but still aliveThe best way of building fault tolerant system is to find some general purpose abstraction with useful guarantees , implement once and let the system rely on those grantees.Consensus : all nodes agree on something.e.g. in single leader replication , all nodes need the consensus that : there should be only one leader in the systemConsistency GuaranteesIn replication, data reach to different node at different time -> you may read different data at a time point from different node ...继续阅读 (23)

Chapter7 TransactionA transaction is a way for an application to group several reads and writes together into a logical unit.Either the entire transaction succeed(commit); or it fails (abort, rollback)The Slippery Concept of a TransactionThe meaning of ACIDAtomicity, Consistency, isolation and durabilityAtomicitySometing cannot be breakdown to smaller partsIn ACID context , atomicity describe what happens is a client wants to make several writes but a fault occurs after some of the writes have been processed.Without it, some changes may take effect but we cannot know and when there is a retry, ...继续阅读 (18)

Replication of database helps in many aspectsScalability -> spread increasing data loadFault tolerance/high availability -> one down, another take over;Latency/performance-> multiple datacenter across world might help avoid network travel across the earth;Scale to higher load:Shared memory (powerful machine): cost grow fast; limited fault tolerance -> vertical scalingShared disk: several independent CPU and a shared disk(they are connected via network): may suffer from lockShared nothing : horizontal scaling , has many nodes(machines) with their own CPU and disks;Data being distributed across ...继续阅读 (17)

Chapter6 PartitioningScalability is the main reason for partitioning : different partitions can be places on different node in a shared-nothing cluster . Thus, large dataset can be distributed across many disks and the query load can be distributed across many processors.This chapter will discuss ways of partitioning , and how the indexing interacting with data partitioning ; then talk about the rebalancing if you want to add or remove nodes in the cluster; finally we discuss how databased route requests to the right partitions and execute queries.Partitioning and ReplicationPartition is usua ...继续阅读 (17)

Chapter3 Storage and RetrievalData structures that power your databaseLog based database needs index to find particular data efficiently.The idea behind is basically keep some additional data aside , which helps you locate data you want.Adding index incurs overhead of writing, but boots readingApplication engineer add index wisely .Hash IndexesK-V index can be implemented by hash map.e.g. you have a in memory hash map that stores the key and offset of the data for that key. You don't have to go through all the file(log-structured file on disk), you only refer the map and go to the right positi ...继续阅读 (17)

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