wang
7K posts

wang
@wangzhr4
Creating the computing engine for next era. Cloud | Backend | Frontend | AI Infra
Shanghai, China Katılım Ekim 2022
948 Takip Edilen3.2K Takipçiler

今天在一个育儿群里看到一个爸爸说了句话,群里瞬间炸了。
他说:"我闺女三年级,我已经彻底放弃管她学习了。不报班,不陪写作业,每天放学就让她疯玩。"
群里立刻分成两派。一派说你这是不负责任,三年级正是拉开差距的时候,你现在不管以后她恨你。另一派说终于有个明白人了,现在的孩子被逼得连觉都睡不好,童年都没了。
我想起我自己小时候。我妈从来不管我学习,我照样考上了还不错的大学。但我一个发小,他妈从小盯着他上奥数、学英语、练钢琴,他现在在一个三线城市做销售,月薪六千,钢琴十年没碰过。
说个残酷的事实:你焦虑的那些东西——奥数金牌、英语竞赛、钢琴十级——在孩子25岁以后,没有任何一项能决定他过得好不好。真正决定一个人能不能过好这一生的,是他有没有被好好爱过,有没有学会跟自己相处。那些从小被逼到崩溃的孩子,长大后最大的成就往往是学会了原谅父母
中文

AWS 无比业余和垃圾,简直是令人发指地业务,希望你们不要踩到这个坑
AWS EC2 在八代机准确说是 Nitro V6 中将网卡上的 tcp 链接存活时间从默认的 432000 改成了 350 秒,这导致一旦你购买的EC2 是八代机就会莫名其妙地出现太多的链接失效后丢包——第一宗罪,垃圾,业余,如图
网卡在丢包的时候只丢进来的不丢出去了,还可以理解,但是丢了不给任何反馈,比如释放超过 350 秒的链接业界都会给个 RESET ,他娘的他一声不吭就干了,我他妈掐指一算(这种问题一般我掐指一算能算出来在哪一跳丢掉的),这次我手指掐没了都没掐出来,丢死人了——第二宗罪,垃圾
我不知道 AWS 的技术/产品是怎么考虑的居然做这个修改
只能说云计算这个门槛太低了,钱太好赚了,另外就是忽悠了不懂技术的老板苦了干货的技术人员
必须加个标签以备我以后来罗列 #垃圾云计算

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@schteppe @sasuke___420 C and C++ are 2 distinct and different languages.
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@ptr_to_joel It is slow. HPC only use C/C++/Fortran.
You use JAVA to solve differential equations?
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wang retweetledi

Which programming language should you choose for teaching?
Though many schools use Java, C#, C or C++, many others have adopted Python. The upside of Python is that it is somewhat easier to get going (helps motivation). The downside is that Python makes it harder to think about low-level issues such as data structures since everything is abstracted away.
My own view on the matter, is that students should become polyglots. It is a strategic mistake to focus on a single programming language.
But what about learning outcomes? Hott tells us that it does not matter.
« there was no statistically significant difference in overall outcomes or struggle between students who complete their programming assignments solely in Python, solely in Java, or a combination thereof. Additionally, there was no statistically significant difference in overall scores on programming assignments, written problem sets, or quizzes from the course based on the language students chose when implementing their solutions. From these results, we conclude that providing students with a choice of programming language, including allowing students to program in a language they are more familiar with, does not appear to dramatically improve student outcomes. Additionally, the use of Python over Java (or consequently Java over Python) in an upper-level algorithms course does not improve performance overall, even though it may provide some benefit in isolated assignments. Therefore, educators need not worry about how the programming language chosen for their courses may impact student outcomes. »
Hott, J. R. (2025, August). Student Outcomes When Provided Programming Language Choice in an Algorithms Course. In Proceedings of the 2025 ACM Conference on International Computing Education Research V. 2 (pp. 26-26).
Hott has interesting research...
engineering.virginia.edu/faculty/john-r…
Coming back to what kids should learn, I largely agree with @lzsthw and his essay « AI Didn't Kill Programming, You Did ». Instead of worrying about which programming language we should use, we should turn things around and tell kids how to start a business, how to become independent from tech trends, and so forth.
The very idea that you should standardize on one programming language should be a red flag.
You can learn programming with anything. Start with Logo, Ada... Do it all!
Heck!!! Invent your own programming language.
learncodethehardway.com/blog/39-ai-did…

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