Netlogo olympic logo

Just a little olympic netlogo-ing to de-stress
:P

to setup

clear-all

ask patches[

set pcolor white

]

create-turtles 5[

set ycor 0

]

ask turtle 0[

set xcor -12

set ycor 3

set heading 180

set color blue

]

ask turtle 1[

set xcor 0

set ycor 0

set heading 0

set color yellow

]

ask turtle 2[

set xcor -3

set ycor 3

set heading 180

set color black

]

ask turtle 3[

set xcor 9

set ycor 0

set heading 0

set color green

]

ask turtle 4[

set xcor 6

set ycor 3

set heading 180

set color red

]

ask turtles [set pen-mode "down"]

end

to move-turtles

;call forever

ask turtles[

lt 16

fd 1

]

end

trying to bake on windows, but unseralize being wierd?

Notice (8): unserialize() [function.unserialize]: Error at offset 0 of 1519 bytes [CORE\cake\libs\cache\file.php, line 178]

Notice (8): unserialize() [function.unserialize]: Error at offset 0 of 28 bytes [CORE\cake\libs\cache\file.php, line 178]

Notice (8): unserialize() [function.unserialize]: Error at offset 0 of 5 bytes [CORE\cake\libs\cache\file.php, line 178]

modify cake\libs\cache\file.php, trim $data before serialize and unserialize functions:

$data = trim($data);

at line 177 and line 135

ref: http://cakephp.lighthouseapp.com/projects/42648/tickets/769-unserialize-error-cakephp-131-unusable-on-windows

Study:Money

I recently spoke to a very good friend of mine, who introduced a concept i found difficult to grasp: the study to money ratio. He more or less justified his academic pursuits on the potential monetary return for the particular field/subject/course. This approach does indeed make alot of sense, particularly in an environment which nurtures the "money making" side of life. Without a doubt, money is important, and more of it implies a more comfortable life, however I am never in agreement whenever someone makes an academic decision based on profitability.

The do what you love vs do what makes money discussion is one i've often made a fuss about

. essentially, everyone has a decision to either do primarily what they love, or to primarily do what makes money.

Recently I was looking at a Harvard CPL video (http://www.youtube.com/watch?v=y5I_cnpP99U), in which Michael Porter provided some interesting insights on the nature of profitability. Apparently, it has nothing to do which field you decide to compete in. He went on to say what does make a region competitive and profitable is not what it does, but how productive it is. He noted that if a region is highly productive, it is prosperous, and it does not matter what field it competes in. Productivity breeds expertize! if a region produces large amounts of a product, chances are it would have come across and solved alot of problems related to producing that particular product. (a good example is Trinidad carnival, truuust me, the guys in charge know how to organize an event)

I've learned that with some concepts, the macro level can be applied to the micro level. Let's say the macro level in this case is a region as Michael Porter is speaking about it in the video. The micro level might be each individual. He does indeed mention that if your employees are highly productive, and provide greater value on the dollar, you can obviously afford to pay them better. going just a little further, it only makes sense that if you spend every day of your life knitting sweaters, after 10 years you'll be one hell of a skilled sweater knitter. but what kind of nut would spend 10 years knitting sweaters?? the nut that likes it! that particular nut will have to have some deep passion for knitting sweaters that allows them to do so continuously for this length of time. very few other persons will be as good as they are when it comes to knitting sweaters, and they would have a high-quality product which is hard to reproduce, meaning they can sell their sweater for big $$ (if they wanted to)

so let's re-examine what we know so far, being profitable is directly linked to being productive, regardless of the field; if you're going to be very productive in a particular field, it helps if you have some passion for the field.

In summary, do what you love, and profit will follow. :-)

idea!!

some new kind of tag that tells you what questions are answered on a specific webpage, at what points in a video etc..

people are always asking questions, so if tags are formed in that way it might be easier for people to find answers

c++ to java

you know, every time I tell someone that I'm converting a c++ application into java, I usually get lectured about java being invented to solve all of the shortcomings of c++, yet i still find great difficulty in expressing certain c++ concepts in java. For example, I can't make an unsigned int in java, and when i see code like this:

typedef unsigned int a

typedef unsigned char c;

unsigned char *B;

B=(c*)calloc(a, 1);

I practically soil myself. not only do i not have unsigned ints in java, so in order to match the max value i have to use a long. So instead of a 32-bit variable, i'm using a 64-bit variable. The code above presents another problem; i can't exactly give a java array a long index.

Not kool! Just thought I'd vent about that for a bit. If anyone has any ideas about how to convert this to java, let me know!

....salty ):

so if we store user passwords as a streight hash of the password in the user database, and said database is somehow compromised, an attacker could make use of rainbow tables to find the password. If we salt the password before storing, like:

SHA-1(uppercase(username)+password)

then that makes for a stronger hash, but then an attacker might know this and will adjust his attacks to include passwords prefixed with some other field (if it's that important to him)

i spose what we can do is store passwords like this:

un=uppercase(username)

split un into x parts, depending on length : u1,u2...ux
plit password into x parts: p1,p2....px

then we can store passwords like this:

SHA-1(u1,px,u2,px-1.....p1,ux)

or something slick like that, i dunno. the kool thing is that if the attacker evenfinds the reverse of the hash, and knows the username and tries to remove it from the string, the password is still mixed up!

adventure!

The first thing I did was open up notepad, and entered the following test text:
i've created
a text file!

Next, I saved this as file.txt, then went to the command line, typed in 'debug file.txt' and did this:
-d
1794:0100 69 27 76 65 20 63 72 65-61 74 65 64 0D 0A 20 61 i've created.. a
1794:0110 20 74 65 78 74 20 66 69-6C 65 21 0D 0A 00 83 17 text file!.....
1794:0120 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0130 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0140 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0150 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0160 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0170 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
-e110
1794:0110 20.00 74.83 65.17
-rcx
CX 001D
:010
-rcx
CX 0010
:
-w
Writing 00010 bytes
-q


Then when I open file with notepad, the contents are:

i've created
a

so then:

I delete all the contents of file.txt, the size reads as 0 KB

Then:

-d
1794:0100 69 27 76 65 20 63 72 65-61 74 65 64 0D 0A 20 61 i've created.. a
1794:0110 00 83 17 78 74 20 66 69-6C 65 21 0D 34 00 83 17 ...xt file!.4...
1794:0120 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0130 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0140 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0150 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0160 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
1794:0170 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................

0_o ….. hey all that data is still there, and where did that 4 come from?

-rcx
CX 0000
:

So then I do this:
-rcx
CX 0000
:01f
-w
Writing 0001f bytes
-

Then when I open the file in notepad, I get this:
i've created
a ƒxt file!
4 ƒ

so then I tried:
-rcx
CX 001F
:11
-w
Writing 00011 bytes

Which gave me this:
i've created
a

to be continued!…..