joelvh

9 ms·

1.
by joelvh 13y ago
I've created some command aliases in my bash profile. There are also tools to create shortcuts for git commands. Other than that, I have created shell scripts that I copy to projects, and also some Rake commands. I haven't spent enough time
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How to Weather the Ups and Downs of the Startup World: Spam Comments(joelvanhorn.com)
2 points by joelvh 14y ago|0 comments
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by joelvh 15y ago
I wonder how many companies are currently running tests like this in the enterprise. Anyone have an idea of what people currently use?
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How to Rid the World of "New User" Email Activation Links(joelvanhorn.com)
1 points by joelvh 15y ago|0 comments
5.
by joelvh 16y ago
You might be able to signup for a new account and get another free year.... if the deal is still on by then.
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by joelvh 16y ago
Great job! I wrote up that post about WolframAlpha and wonder if there's an API so you could integrate WA to make it more robust?
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by joelvh 16y ago
Interestingly enough, WolframAlpha can generate a CAPTCHA image of each of these text questions, as to make it harder for a bot to decode AND answer the question! Check it out: http://www.wolframalpha.com/input/?i=CAPTCHA+What+is+seven+h
8.
by joelvh 16y ago
Exactly. The whole discussion here points to the major flaws in using text as CAPTCHA. Maybe if questions were more metaphorical they would be harder to guess, but then there is no absolute answer. I think a combination of text, image, a
9.
by joelvh 16y ago
Exactly!
10.
by joelvh 16y ago
Haha.
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by joelvh 16y ago
If you were able to analyze the sentence structure of all 180 million questions, how many different sentence structures would there be? This all points to the fact that you can build algorithms to guess the answers eventually.
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by joelvh 16y ago
Ha! Valid point!
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by joelvh 16y ago
Also think about the way algorithms (like WolframAlpha) interpret the structure of the questions. Like some of the other commenters, switching some words around makes WolframAlpha fail. It might be interesting to come up with a methodology
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by joelvh 16y ago
Right. And as a little experiment, it was surprising the results I got. It also implies that it is not hard to structure the sentences in a way that makes it harder for WolframAlpha's algorithms to get the right answer. But doing that fo
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by joelvh 16y ago
Good point. That gives a good indicator as to how the algorithm works. Not necessarily based on colors, but rather words in a list...? Maybe the construction of Text CAPTCHA sentences needs to be chosen carefully when thinking like an al
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by joelvh 16y ago
I played around with the demo page and used WolframAlpha to answer the questions for me.... With a little massaging, WolframAlpha would get you pretty far in hacking it. http://news.ycombinator.com/item?id=1891375
17.
Using WolframAlpha to Hack Text CAPTCHA(joelvanhorn.com)
104 points by joelvh 16y ago|46 comments