Hacker News: JVerstry

New comment by JVerstry in "When AI Costs More Than the Engineer"

JVerstry — Mon, 06 Jul 2026 08:20:32 +0000

What about productivity gains?

New comment by JVerstry in "Claude: Elevated errors across many models"

JVerstry — Tue, 16 Jun 2026 19:11:05 +0000

I ask Claude to implement non-regression tests. It works like magic. With a couple of modules checking for code quality, more magic. Add some online performance tests if relevant, and it is close to paradise. From time to time, send it to some blog pages and articles with implementation ideas and recommendations. Look for best practices and let it do the analysis and implementation job if it makes sense... T

New comment by JVerstry in "Show HN: Gemini Pro 3 imagines the HN front page 10 years from now"

JVerstry — Wed, 10 Dec 2025 09:51:11 +0000

Hands down the best post in years... Tears, tears...

New comment by JVerstry in "Is technical analysis just stock market astrology?"

JVerstry — Tue, 25 Jul 2023 22:37:46 +0000

Any serious (retail or not) investor must read 'Consequences of fat tails' by Nassim Taleb. Period.

New comment by JVerstry in "Ask HN: As a dev: learn marketing? Or start side project? (startup skills)"

JVerstry — Tue, 18 Apr 2023 09:07:57 +0000

I have a CS degree and pursued a marketing MBA. To make it short: i) a great product with basic marketing trumps a bad product with "fantastic marketing" on the long ii) the product makes the money, not the marketing iii) one can't hold both a CS and a marketing role at the same time as business grows, you will have to choose one or the other. About learning marketing, practice trumps theoretical knowledge. IMHO: build a great product and team-up with a competent marketer.

New comment by JVerstry in "Ask HN: I feel my career is at a dead end. Any advice on what could I do?"

JVerstry — Sun, 11 Apr 2021 12:47:19 +0000

Many times over, I have been working in companies where they had no other option but to call back coders from retirement to ensure migration and operational activities. There are plenty of aging systems requiring coding skills and experience freshmen can't deliver. Tech can be a lifetime career for sure, you only need to figure out where the demand is and navigate it...

New comment by JVerstry in "SARS-CoV-2 was already spreading in France in late December 2019"

JVerstry — Tue, 05 May 2020 08:59:20 +0000

I am was on a mission in south-west France at that time and the local pharmacist told me around February she was convinced Covid was there since November 2019... She saw some of her customers having strong cases flu that would not go...

New comment by JVerstry in "Single-dose propranolol tied to ‘selective erasure’ of anxiety disorders"

JVerstry — Sun, 14 Apr 2019 13:10:53 +0000

I bet this discovery is related to another recent discovery: "Blocking IgSF9b in pathologically anxious mice has an anxiolytic effect and normalises anxiety behaviour in these animals." (see https://www.mpg.de/12620765/anxiety-protein-amygdala)

New comment by JVerstry in "The cloud skills shortage and the unemployed army of the certified"

JVerstry — Sat, 02 Feb 2019 11:49:17 +0000

Not so sure Docker is the only way forward when it comes to cloud scaling or deployment. VM templates are a very good alternative. They are more stable, more flexible/customizable and integrate more smoothly with CI.

New comment by JVerstry in "Ask HN: What technologies did you learn in 2018?"

JVerstry — Sun, 23 Dec 2018 13:48:14 +0000

This year, it has been: R, Azure, Power BI, deep SQL Server, T-SQL, Machine Learning (+ Data Governance, but it is not a tech). I think next year, I'll go deeper with C# and start F#...

Why Are Data Science Leaders Running for the Exit?

JVerstry — Thu, 30 Aug 2018 10:52:03 +0000

Article URL: https://www.datascience.com/blog/why-data-science-leaders-fail

Comments URL: https://news.ycombinator.com/item?id=17875617

Points: 3

# Comments: 0

New comment by JVerstry in "A newcomer’s (angry) guide to R"

JVerstry — Wed, 13 Jun 2018 21:02:37 +0000

I learned R coming from Java, Node, PHP and Python and I love it !!! It is awful as an application development programming language, but it was never designed for that purpose. It was designed for STATISTICS. Try to achieve advanced statistics with your traditional software engineer's preferred language and see which language you hate then. The only tricky R concepts to learn for newbies are: recycling, formulas and vectorized functions. Add RevoScaleR to R and it kicks major ass when dealing with big data manipulation. Oh yes, big time !!!

New comment by JVerstry in "Breaking the trillion-rows-per-second barrier with MemSQL"

JVerstry — Mon, 19 Mar 2018 14:47:54 +0000

I wouldn't be so sure. If data is partitioned on stock symbols, then there is already a grouping by subset happening at the partition level, which may considerably ease the job of aggregation (it depends on the number of symbols and it seems you have about 1500-1600). Considering there is a clustered index, it means values are saved "in order". Then, a page could easily have a min value = max value situation, and the saved count in meta-data would be valid (no need to scan all values in the page again). Should the index use a dictionary, then one only has to count the number of items in the corresponding entry without scanning the rows. Such information is stored in the index, not in the rows. I have no doubt about one's intention. It's just that I think we could do better to support the claim. If your where clause contained something like (shares mod 3) = 0, then I would be pretty sure all rows would be scanned, because such information is not aggregated at the page level. If possible, I would also check the execution plan for any incongruent values.

New comment by JVerstry in "Breaking the trillion-rows-per-second barrier with MemSQL"

JVerstry — Mon, 19 Mar 2018 11:41:05 +0000

I have doubts about the "We’re actually spending some time on every row" claim. Saving data using columnstore often comes with meta-data saved at the page level, such as min, max and count values for the data in that page. These values are used to filter and optimize the flow of data processed for a query (I mean 'skipped' here). If you run a 'count' query 10 times, it's very unlikely the DB will count rows 10 times. It will rely on the page's existing meta-data when available (i.e., already computed). The tests described in the post are misleading IMHO.

EDIT: This comes on top of the fact that DBs can store queries results too. Moreover the post does not tell whether they have implemented clustered or filtered indexes on the considered columns. It does not explain how partition has been performed too. All this has a big impact on execution time.

New comment by JVerstry in "Bitcoin: Evidence of spoofing, wash trading, and a scheme known as ‘Tether’"

JVerstry — Sat, 05 Aug 2017 15:28:41 +0000

Yup, that's the big deal here... not the spoofing...

New comment by JVerstry in "Ask HN: Competitor is successful with black hat SEO"

JVerstry — Mon, 20 Mar 2017 17:41:38 +0000

Don't engage in such tactics, because once Google hits, it hits hard... Report this black hat SEO and be patient. Keep doing the right thing. SEO is a marathon. But most important, make sure you meet your visitors' intent over and over, again and again. Google focuses on customer satisfaction, not on promotion of good SEO.

Explain React concepts, coz I am not a UI specialist

JVerstry — Sat, 26 Sep 2015 10:42:57 +0000

Article URL: http://www.mytechnotes.biz/2015/09/explain-react-concepts-principles.html

Comments URL: https://news.ycombinator.com/item?id=10282729

Points: 1

# Comments: 0

Proper SEO with Angular.js? Just forget about it

JVerstry — Thu, 16 Jul 2015 09:37:52 +0000

Article URL: https://seosummaries.com/expertise/seo-angular-js.html

Comments URL: https://news.ycombinator.com/item?id=9896190

Points: 1

# Comments: 0

Show HN: An advanced and transparent SEO platform and library

JVerstry — Wed, 22 Apr 2015 11:39:52 +0000

Article URL: https://ligatures.net/about.html

Comments URL: https://news.ycombinator.com/item?id=9419682

Points: 1

# Comments: 0

New comment by JVerstry in "Ask HN: What do you do when your website seems to be penalised by Google?"

JVerstry — Mon, 12 Jan 2015 11:43:29 +0000

First, make sure your sitemap.xml is exhaustive. Then, check the number of indexed pages in Google Webmaster Tool (after a couple of days if you had to update you sitemap). If few pages are indexed, go through this checklist at https://ligatures.net/content/expertise/site-not-indexing-ch... to fix possible issues. If your pages are still not displayed in search results, then you are likely another victim of a well-known chicken-and-egg problem for content based sites: you need links for ranking and you need ranking to attract links. Yet, most niche are saturated and you are likely crushed by competition. The only efficient way out is to obtain dofollow backlinks from sites/blogs which are: i) Not under your control (i.e., a forum profile link is under your control...) ii) Editorially reviewed iii) Have relevant topics to yours iv) Which are already trusted by Google v) Which are popular Other links won't make much of a difference.