johnaspden

15 ms·

121.
by johnaspden 17y ago
There's a second half being written which will do symbolic differentiation, and maybe a few small macros. This is supposed to be a gentle introduction for non-lispers and I seriously think this will be enough for two hours. But I'm writing
122.
Introduction to Lisp: Heron's method(learnclojure.blogspot.com)
31 points by johnaspden 17y ago|8 comments
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Sergey Brin Profile (Independent)(independent.co.uk)
2 points by johnaspden 17y ago|0 comments
124.
by johnaspden 17y ago
Cool, thanks!
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by johnaspden 17y ago
Because 'don't be evil' is one thing (a good thing). But here they seem to be going for 'do the right thing', which is a whole different plan. This will cost them, at least short term. That's part of what 'the right thing' means. Originally
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by johnaspden 17y ago
Firefox, same problem on that page, changing encoding solves it.
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by johnaspden 17y ago
I stopped reading this half way down. Is there anything in the article except blether? The first half seemed to be saying 'Drugs companies do tests against placebos. Merck is short of drugs.' Can someone who took the trouble to plough throu
128.
by johnaspden 17y ago
The slacker view: http://johnlawrenceaspden.blogspot.com/2009/11/horror-of-pro... I wrote this article after people had a go at me for teaching kids to program. The first half doesn't sound like you, so skim it, but the second half might
129.
by johnaspden 17y ago
Upvoted for "The Machine Stops". What vision from 1908! I notice that it's copyright EMF 1947. Any idea what that means? There's something about 'dying in France' that made me think of the Great War.
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by johnaspden 17y ago
Thank you so much for that and for your previous post. Exactly what I wanted.
131.
by johnaspden 17y ago
That makes me feel really sad. My epiphany was your iron curtain coming down. I can see how. In fact I had the same reaction initially (and my parents are graduates, but they don't know the first thing about maths, so they were no help to m
132.
by johnaspden 17y ago
Well, actually, sudo apt-get ipython sudo apt-get install ipython ipython -pylab sudo apt-get install pylab sudo synaptic (<--used it to find pylab packages) sudo apt-get install python-matplotlib sudo apt-get install python-matplotlib
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Why kids don't program(johnlawrenceaspden.blogspot.com)
94 points by johnaspden 17y ago|89 comments
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by johnaspden 17y ago
And that will mean that we've got good darknets for real criminals to use, whilst people doing nothing wrong cover for them.
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by johnaspden 17y ago
OK, to rephrase the question, what will the people accepting the jacuzzis full of money use as arguments?
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by johnaspden 17y ago
So the freedom of the world now depends on the European Union, which we know is corrupt. Is there any way to buy shares in whatever method media giants use to bribe European politicians?
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by johnaspden 17y ago
And China put the brakes on all innovation.
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by johnaspden 17y ago
I've been going down this list, voting up things that seem interesting. And suddenly I thought "Bloody hell, I'm using my real name to criticise the government on the internet". And obviously, I've decided that I have no problem with that.
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Diax's Rake(johnlawrenceaspden.blogspot.com)
21 points by johnaspden 17y ago|2 comments
140.
by johnaspden 17y ago
I was in Paris for a week in Spring, and rode velibs everywhere every day. No problems at all. Occasionally you found a knackered one, but it looked like wear and tear rather than vandalism. It's a superb idea.
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by johnaspden 17y ago
As a circle expands, its area grows proportional to its circumference. The circumference is proportional to the radius. So you're getting the area by integrating a linear thing.
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by johnaspden 17y ago
Thanks! Yes, when you grow in a direction at right angles to yourself, you don't increase in magnitude. So the turning arrow is the same length at the end as it was at the beginning. This is actually a slightly tricky point, because it requ
143.
by johnaspden 17y ago
The complex plane is the fundamental thing. It's the only way to get to the complexes without doing anything spooky! Defining i to be "the square root of minus one" is about as sane as defining it to be the square root of the colour blue.
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by johnaspden 17y ago
Thanks! No, I worked it out for myself while I was thinking about what the exponential of a linear operator is. The explanation at my school was the one with Taylor Series. By the time I got to university it was just taken as a given, so no
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by johnaspden 17y ago
Imagine you're a complex number, which is just a type of 2-vector. Exponentiation is to do with growth at a speed which is a multiple of how big you are already. i is the multiplication which turns you through ninety degrees. If you grow in