The Locker Room

user11126

1:44 AM

@IvoFlipse that would be cool, post it on the blog!

user11126

sancho commented on my blog post: fitness.blogoverflow.com/2012/03/…

user11126

2:13 AM

@freiheit my sister just tweeted about how bad DC cyclists are

user11126

2:39 AM

Ivo Flipse

12:04 PM

FU rails FU!

user11126

12:15 PM

hahaha what's the problem?

Ivo Flipse

Factory Girl doesn't want to install

Invalid gemspec in [/usr/local/lib/ruby/gems/1.9.1/specifications/factory_girl_rails-1.6.0.gemspec]: Illformed requirement ["#<Syck::DefaultKey:0xb244310> 3.0.7"]

Which I kind of need to get my test coverage up

user11126

install an older version of factory_girl?

user11126

using rails 3?

Ivo Flipse

think so

version 1.6 also gives errors

user11126

it looks like you are, there's factory_girl and then there's factory_girl_rails

Ivo Flipse

12:24 PM

Hmm factory_girl doesn't give problems :S

user11126

strange, if you're on rails 3 then you should be using factory_girl_rails

Ivo Flipse

12:51 PM

@MattChan I'm trying to install 1.2, but I can't get it working :S

Ivo Flipse

1:02 PM

I tried removing them, but I don't think I have 'permission' to delete them from the GUI

Ivo Flipse

1:42 PM

hi @ThomasMcDonald, I officially hate Ruby (sometimes)

user30

hey bro

Ivo Flipse

Are you calling me a brogrammer? ;P

user30

get with the brogram

user11126

1:57 PM

a rockstar developer

user30

transmit <3

Ivo Flipse

2:13 PM

20.87/30 for my latest quiz

not bad, given how clueless I was at certain questions

user30

2:33 PM

I've pretty much given up with the online courses, haha

user30

Not enough hours in the week

user30

I plan on watching the rest of the NLP videos cause they're pretty interesting

Ivo Flipse

@ThomasMcDonald yeah, I'm not sure if I'll be able to do their exercises every week

though saas-class is ending soon I believe

Ruby is killing me though :P

user11126

@IvoFlipse did you check out the perl code i sent you?

Ivo Flipse

@MattChan haven't had the change yet

Omg...

the regular version is easy to follow, but god... that short one

user11126

2:40 PM

hahaha

user11126

a friend of mine pointed me to a technique he used when he did his the previous year

user11126

we didn't know it at the time but it's similar to run-length encoding

user11126

large sequences of characters were "compressed" by substituting it for a single character or a smaller string

user11126

"asdf asdf asdf asdf asdf asdf asdf asdf" will all get replaced by "g"

user11126

the program basically works on using regexes to do that stuff and then it gets evaluated

Ivo Flipse

2:49 PM

I bet such stuff will get covered in the compiler design class too

user11126

@IvoFlipse have you ever programmed in assembly?

Ivo Flipse

hell no, though I did read a bit about it in CODE the hidden language

and I saw youtube video's that showed crazy animations written in assembly

user11126

there was a book i used in a 2-credit class, it was called for C for C++ programmers

user11126

amazon.com/Pointers-C-Kenneth-Reek/dp/0673999866

user11126

that book was written by one of our (retired) professors

Ivo Flipse

2:52 PM

any good?

user11126

what was good about it was how it discussed pointers

user11126

and also the generated assembly code with different examples

user11126

it's not a baisc programming book (assumes you already know for loops, conditionals, etc.) but it's more of a supplement

Ivo Flipse

Hehe, well the stack of books I still have to read is rather thick :P

if I want to read about c++, I think I'll first read the C++ Programming Language

user11126

it's good stuff to know

user11126

2:55 PM

and then afterwards, you just realize that people way smarter than you have already written very good compilers that optimize your code

Ivo Flipse

@MattChan hehe, I already realize that :P

@MattChan P(A) != P(B) <-- Any idea if that isn't mean they are not equal or not the same (as in the same object)

or @freiheit :P

user11126

uh, wait, is that probability?

Ivo Flipse

Btw my answer here is severely underrated

2

Q: Formula to count calories burned during swimming

The swimming calculator site tells you how many calories are burned during swimming based on a formula by the University of Wisconsin. Our swim calorie burned calculation is an estimate using on distance, pace, time, weight and stroke. The calorie formula is based on a study by University of ...

@MattChan yeah, its that dashed out = sign

Its asking whether A and B are independent random variables

surely they can have the same probability at some point, but that doesn't mean they are referring to the probability of the same thing

user11126

right

user11126

it's like..... planetary alignment?

user11126

3:07 PM

i don't have a good analogy

user11126

also super bad at stats and probability

Ivo Flipse

hehe, so am I, which is why I'm working on it :P

well first time for a hair cut, it'll have to wait :P

user11126

3:42 PM

@IvoFlipse factory_girl 3.0 is out now robots.thoughtbot.com/post/19412394597/factory-girl-hits-3-0

freiheit

4:00 PM

@IvoFlipse what? P(A) != P(B) requires some context. :)

@IvoFlipse I upvoted, but am highly tempted to convert the one formula to two separate gender formulas and use fixed-width to make it easier to compare them. :)

user30

4:23 PM

@IvoFlipse ooh what compiler design class?

user30

oh, on Udacity. damn.

Ivo Flipse

4:48 PM

@freiheit Go ahead, I thought about that as well, given its a bit silly like this

freiheit

4:59 PM

@IvoFlipse ok, fine, I did. hopefully I got that right. :)

Ivo Flipse

looks good to me @freiheit

freiheit

The sorta weirdly arbitrary precision really jumps out at me. Especially having the, uh, "gender constant" having 6 digits of precision and everything else only having 3

Ivo Flipse

@freiheit That might be a nice comment to add

user30

github.com/styleguide

user30

interesting read

Ivo Flipse

5:22 PM

@ThomasMcDonald It is indeed interesting, though I don't program enough Ruby for it to be really useful (yet)

freiheit

5:43 PM

@IvoFlipse so, should I post questions asking how my Garmin bicycle computer and Strava calculate Calories burned?

Ivo Flipse

@freiheit Only if you have a formula :P

And I hope it was clear from my answer that I don't think calculations are particularly useful

though those computers track them, so you can compare the values over time, which is useful

@freiheit Garmin does make nice maps though

freiheit

strava.zendesk.com/entries/…

Ivo Flipse

strava.zendesk.com/entries/20959332-power-calculations

does it measure the power you used? like measuring the force on the cranks?

because that's what is requires for the rolling resistance

the wind speeds and your frontal surface

the gravity fluctuations (ok, those won't matter), but riding up a hill will

Actually if they simplify it to estimate your speed + acceleration and know the altitude differences, I think they might do an ok job, simply assuming all else is equal

freiheit

6:07 PM

@IvoFlipse No, I do not have a garmin with any kind of power meter. Rolling resistance of bicycle tires on pavement is reasonably well-known and low enough to not be a huge factor.

air resistance is the big factor that they'd have no way to know unless I had a power meter of some kind

Ivo Flipse

@freiheit especially the latter, because the width of your wheel, your body weight + the weight of your bike certainly will matter

however, the speeds at which you cycle, the quadratic component of the air resistance and the required energy to move your mass vastly outweigh it

freiheit

@IvoFlipse you do tell strava your weight and the bike's weight. Sure, there's a couple percentage point variance from day to day...

Ivo Flipse

@freiheit Well that already narrows it down, so I agree you can neglect the other details

Damn I have to calculate: P(Accident = 1 | Traffic = 1) and P(Accident = 1 | Traffic = 1, President = 1).

freiheit

Also, power meters are really expensive. :) A HR monitor would be cool, but more for trying to hit target HRs, which is probably mostly only useful after a stress test at the cardiologist's office.

user11126

7:03 PM

sweet got my pax east badge!

Ivo Flipse

ah you going there?

user11126

yup

user11126

just saturday though

user11126

i have some friends coming in from out of town too

user11126

not sunday

user11126

7:05 PM

anime boston also coincidentally is the same weekend, but i'm not going to that

Ivo Flipse

10:27 PM

shop.oreilly.com/product/…

Darn the book isn't out yet :(

freiheit

11:00 PM

@IvoFlipse Release date of April 2012? I'll bet it's possible to get a review copy of some sort if you wanted to do a review for the blog...

(either electronic or the sort of thing that looks like it came out of a regular laser printer)

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