davidjohnstone

7 ms·

31.
by davidjohnstone 6y ago
I also made an Australian version: https://www.thenewseachday.com/facebook-phone-numbers-austra...
32.
Show HN: Test if your (US) phone number is in the leaked Facebook data(thenewseachday.com)
44 points by davidjohnstone 6y ago|65 comments
33.
by davidjohnstone 6y ago
I created https://www.thenewseachday.com/facebook-phone-numbers-us and https://www.thenewseachday.com/facebook-phone-numbers-austra... to check if phone numbers are in the data. So far I've only made t
34.
by davidjohnstone 6y ago
I created https://www.thenewseachday.com/facebook-phone-numbers-us and https://www.thenewseachday.com/facebook-phone-numbers-austra... to check if phone numbers are in the data. (The data is split by countr
35.
by davidjohnstone 8y ago
The results aren't as exciting as some, but Cycling Analytics pays my bills https://www.cyclinganalytics.com/ https://news.ycombinator.com/item?id=4453967
36.
by davidjohnstone 11y ago
The missing colour in the #a00 to #000 interpolation is because HCL is trying to create a colour outside of sRGB (the green component is less than zero). As for the hue change, one difficulty of making a gradient to black in HCL is that bla
37.
by davidjohnstone 11y ago
It depends what properties you want. That is a much nicer looking rainbow, but it drops the perceptual uniformity that often makes HCL useful.
38.
by davidjohnstone 11y ago
This is a fun topic. Here's a Lab and Lch colour picker I once made: http://davidjohnstone.net/pages/lch-lab-colour-gradient-pick... A keyword not mentioned in this article is "perceptual uniformity". It
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An introduction to OpenGL(open.gl)
3 points by davidjohnstone 11y ago|0 comments
40.
by davidjohnstone 12y ago
Here's the quote in a bit more context: > The internet, while a tool which has revolutionised the way we live, work and operate, has also revolutionised the way sinister and criminal behaviour is orchestrated and undertaken across t
41.
by davidjohnstone 12y ago
This is the thing that I was wishing existed a couple of months ago when I read "Into Thin Air". It's a fantastic read about the 1996 Mount Everest disaster where eight climbers died, but I often had difficulty visualising wh
42.
by davidjohnstone 12y ago
One extra factor is that the YIQ method is presumably based on sRGB colours, whereas the neural network is using colours as the screen is actually displaying them (or, as they're being perceived), and most of us aren't using calib
43.
by davidjohnstone 12y ago
The paper was only an algorithm for part of this — I can't remember the paper, but it gave an algorithm to find all of the closest points to a line. How my algorithm worked was to break the search space into a 2D array of much smaller
44.
by davidjohnstone 12y ago
A few years ago I had to create a nearest neighbour lookup algorithm that had to perform 2D searches in a microsecond with 16 million points (k-d trees and the like didn't cut it). I spent a lot of time reading books and papers on comp
45.
by davidjohnstone 12y ago
First sentence of http://en.wikipedia.org/wiki/SQLite#Features : "SQLite implements most of the SQL-92 standard for SQL but it lacks some features."
46.
by davidjohnstone 12y ago
There are good reasons why work has stopped on the WebSQL specification — everybody was using SQLite, and the specification can't be tied so closely to a single implementation of SQL. The specification even has the line "User agen
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by davidjohnstone 13y ago
Here's the comparison for movies, using the IMDB top 250 and a couple of other lists to try to get a more comprehensive picture. It's from nine months ago, so things may have changed a little since then. http://davidjoh
48.
Show HN: Real estate data visualisation for Victoria, Australia(davidjohnstone.net)
1 points by davidjohnstone 13y ago|0 comments
49.
by davidjohnstone 13y ago
Tip: Round the x and y values of grid lines to the nearest pixel so that you don't have the effect where most of them are drawn over two rows/columns of pixels. It makes it look much sharper.
50.
by davidjohnstone 13y ago
From looking at the source, there's just the regular jQuery and Underscore libraries, and a bunch of custom JS, including the jQuery Waypoints library http://imakewebthings.com/jquery-waypoints/ The animated graph
51.
by davidjohnstone 13y ago
To clarify, this result means that there are infinitely many pairs of primes separated by at most 600. This doesn't mean that the gap between subsequent primes must always be less than 600.
52.
by davidjohnstone 13y ago
"it would not surprise me if bitcoin, or some other digital currency" This is what makes me pessimistic about Bitcoin as long term value store. If a new digital currency that was a significant improvement on Bitcoin was developed
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YouTube Feather beta(youtube.com)
2 points by davidjohnstone 13y ago|1 comments
54.
SwatchMate Cube — Capture the color of any surface(swatchmate.com)
1 points by davidjohnstone 13y ago|0 comments
55.
by davidjohnstone 13y ago
You may have gotten a false positive (as the bottom of that page explains). Try http://lucb1e.com/credgrep/ instead.
56.
by davidjohnstone 13y ago
This is one of the items being auctioned for (RED) in a month. Jony Ive and Marc Newson have had a hand in designing them. Here is a list of (almost) all of the items: http://www.sothebys.com/en/auctions/2013/
57.
by davidjohnstone 13y ago
One of the criticisms being leveled at the DSM-V here is that "normal" is being negatively defined as the absence of disorder: > DSM-5 seems to have no definition of happiness other than the absence of suffering. The normal ind
58.
by davidjohnstone 13y ago
We also do our best to be critical. It makes us look smarter. "Negative reviewers were perceived as more intelligent, competent, and expert than positive reviewers, even when the content of the positive review was independently judged
59.
by davidjohnstone 13y ago
I mentioned that on Twitter. It turns out that those are the limits according to the laws in US (20 mph) and EU (25 km/h), so it's top speed is limited accordingly depending on the country it's in. It's also an amazingly
60.
by davidjohnstone 13y ago
I have a feeling that "imprecise models and simulations" is exactly how actual science is done much of the time these days. The trick is to answer those questions of what data is used and how things are weighted etc. well, and tha

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