edejong

72 ms·

691.
by edejong 10y ago
Well, the schema is a bit more complicated than that. I'd say the 100M / s query rate is sufficient. Here we search for trajectories (road segments + time) going through certain regions within a certain repeating time-interval (sa
692.
by edejong 10y ago
The following reasons come to mind wrt RDBMS: - When properly normalized, future modifications to the relational model will often be much simpler. Transforming hierarchical data stores or document-based ones often involves changing much of
693.
by edejong 10y ago
Of course, this is an extreme example. Most of our front-end is able to serve quite complicated data within 500 milliseconds. Some queries are over a longer time-span (3 months, 0.7 million truck-movement-legs, +/- 200M links), so a 2
694.
by edejong 10y ago
I actually meant clustered. Replication is of course a good idea, but distributed query processing, esp. in combination with transaction processing is often too complicated to get the job done.
695.
by edejong 10y ago
This is on a AWS RDS instance, everything is in (DBMS) cache, db.m4.large.
696.
by edejong 10y ago
"our idea is that developers should know about details such as schemas and indexes (the Parse engineers strongly agreed in hindsight)." Many engineers I have worked with like to throw around terms like: "CQRS", "Eve
697.
by edejong 10y ago
This is a non-sequitur.
698.
by edejong 10y ago
That's proving my point: the CO2 measurements were 400% besides the mark and shouldn't be categorised as scientific given the time-period. My comment tries to place Arrhenius into perspective.
699.
by edejong 10y ago
Hindsight is 20/20, selection bias is a thing.
700.
by edejong 10y ago
Very surprising! Look at the accuracy of the measurements of speed of light [1]. Even Eratosthenes (2nd century BC) approximations on the distance to and diameter of the sun is more accurate. The accuracy of scientific measurements at the t
701.
by edejong 10y ago
I'm not a climate-change denier, far from it, but it is worth noting that Svante Arrhenius made conclusions based on assumptions which are seriously flawed [1] [2]. The effects he described are at least four times exaggerated when comp
702.
by edejong 10y ago
Technically, you'll have to formalize and assert the correctness of (at least) the following components: - All ICs having direct (unlimited) access to memory and/or computation (CPU/DMA/GPU/BIOS) - Boot loader - Ope
703.
by edejong 10y ago
I am certainly not calling you stubborn, arrogant or aloof, I'm terribly sorry if you got that impression and I definitely did not want to imply this.
704.
by edejong 10y ago
It had nothing to do with reading emotions or preparing expectations and everything to do with being stubborn, arrogant and aloof.
705.
by edejong 10y ago
You're still supporting it, so still selling: https://www.ubuntu.com/info/release-end-of-life
706.
by edejong 10y ago
I'm sorry, but I think I trust Canonicals' privacy policy as a source more than you: "Unless you have opted out, we will also send your keystrokes as a search term to productsearch.ubuntu.com and selected third parties so tha
707.
by edejong 10y ago
Oops, my bad. But at least they did, which was my point to begin with. I said goodbye to Ubuntu and their raking since the notorious community discussion, even before it was implemented. They lost my trust and goodwill with that move.
708.
by edejong 10y ago
Ubuntu unity sells your searches in the desktop environment by default
709.
by edejong 10y ago
Interesting take. 'Too clever' for me is: 'using underlying concepts which have semantics that have a poor mental overhead versus applicability within the domain'.
710.
by edejong 10y ago
I hereby correct you. You are wrong. Dijkstra decided to program using pencil and paper much later, and mostly because he (like most good programmers) already knew the solution before writing it down. I correct you again for implying he wro
711.
by edejong 10y ago
"Programmers prefer loops like Algol": Yes, programmers prefer it, but the general structure: `for (init-statement ; boolean-continuation-expression ; iteration-statement) statement;` is syntactic sugar for a specific imperative p
712.
by edejong 10y ago
Could you explain how exactly this quote is applicable to Dijkstra's quote? Which part do you think is arrogant? Alan seems to make an overly broad statement, which is funny, but also weak.
713.
by edejong 10y ago
I agree with todd8, but would like to add that the next paragraphs were not added for two simple reasons: the quote itself was already too long and I felt it summarizes well enough the gist of the argument: programming languages should not
714.
by edejong 10y ago
This (lengthy) quote comes to mind. If you think it is interesting, please read the whole EWD. EWD 340 (Prof. Edsgar Wybe Dijkstra) [1]: "The competent programmer is fully aware of the strictly limited size of his own skull; therefor
715.
by edejong 10y ago
Wifi and owntracks in combination with calendar events.
716.
by edejong 10y ago
In some of my programming environments, such as Emacs, I choose to prettify keywords to unicode characters such as 'function' (λ), 'lambda' (λ), 'forall' (∀) and others. It takes a bit getting used to, but it b
717.
by edejong 10y ago
Using openhab 2, some scripts and a couple of zwave lightbulbs with adjustable color temperature, I've created something very similar. The lights turn on automatic using presence detection and change temperature using a simulated sunse
718.
by edejong 10y ago
You are right. I'm not from the US and my definition of Midwest was totally off. This map confirms my ignorance: https://bl.ocks.org/mbostock/2522624ada2c1f9e0fafb75cca09442... Thanks for pointing it out.
719.
by edejong 10y ago
I don't really want to quibble over definitions, but most would define the Scientific Method as a series of methods, subject to change and continuous improvement, a complex interplay of various processes. Tools, for me at least, are ap
720.
by edejong 10y ago
Data driven is almost a synonym for 'the scientific method', which can hardly be described as a tool.

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