oRenj9 posted:

So, I just finished writing a "file system" as part of my Operating Systems class. This was actually the funnest project I've had in school. I enjoyed working with the bits and bytes so much that I completed it in two days, rather than the allotted two weeks.

tef posted:

You may find the following book useful:

Practical File System Design with the Be File System (is out of print and the author has put a copy online). http://www.nobius.org/~dbg/practical-file-system-design.pdf

Shadaez posted:

I'm a relatively new programmer, and I'm trying to do Perlin noise but I'm having a hard time finding a tutorial or guide on how it works and how to implement it. Every guide or thing I find is just HERES THE CODE AND WHAT YOU CALL TO GET SOME NOISE!
Do I even need to understand how it works, or should I just be basically copying the code?

Jewel posted:

As with most things, you can either find complex algorithms with near-no explanations, or a basic explanation with no code/algorithms.

I tend to prefer the second since it gives me a bit of a logic puzzle in how to code it anyway.

Here's a good one to do with perlin noise, I didn't really use the code here at all, just the ideas behind it.

http://freespace.virgin.net/hugo.elias/models/m_perlin.htm

Shadaez posted:

I found this, too, but some dude on Wikipedia claims it's not really perlin noise?
http://en.wikipedia.org/wiki/Value_noise

etcetera08 posted:

I feel like this is a really dumb question, but how does one release their code for a project without including important credentials? For example, I wanna throw up a web project I working on onto github without my database login information. I'm not sure what the best way to do this is. I can think of a couple solutions but they're kind of ugly.

etcetera08 posted:

I feel like this is a really dumb question, but how does one release their code for a project without including important credentials? For example, I wanna throw up a web project I working on onto github without my database login information. I'm not sure what the best way to do this is. I can think of a couple solutions but they're kind of ugly.

yaoi prophet posted:

How does memory virtualization work with Intel VMX? My understanding is that with EPT the guest can do whatever it wants with CR3, and then the EPT steps in and translates the guest-physical address to a host physical, but what do you do if you don't have EPT available?

Otto Skorzeny posted:

If you're looking at this from a version control angle, a common way to do it is to have an regular config file that is full of default or example values checked into source control and a second 'site' config file that is not checked in which contains any sensitive bits. Your software then looks at both and has the 'site' config file override the real one in the case of differences.

JawnV6 posted:

Trap it and do it in software. There's a VMware whitepaper that compares shadow page tables to EPT.

Otto Skorzeny posted:

If you're looking at this from a version control angle, a common way to do it is to have an regular config file that is full of default or example values checked into source control and a second 'site' config file that is not checked in which contains any sensitive bits. Your software then looks at both and has the 'site' config file override the real one in the case of differences.

etcetera08 posted:

I feel like this is a really dumb question, but how does one release their code for a project without including important credentials? For example, I wanna throw up a web project I working on onto github without my database login information. I'm not sure what the best way to do this is. I can think of a couple solutions but they're kind of ugly.

Goat Bastard posted:

I'm working on a green fields project with developers I respect, who think that the following is a good way to represent reference data in an RDBMS

code:

ID      CODE TITLE    IS_THING_A IS_THING_B IS_THING_C IS_THING_D IS_THING_E
------  ---- -------  ---------- ---------- ---------- ---------- ----------
403934  THA  Thing A  1          0          0          0          0
392933  THB  Thing B  0          1          0          0          0
229304  THC  Thing C  0          0          1          0          0
229390  THD  Thing D  0          0          0          1          0
553323  THE  Thing E  0          0          0          0          1

The benefit as they see it is that we get to use autocomplete when writing SQL queries to find a given type of reference data, and when they need to add more reference data then all they need to do is add another field to the entity in question. Plus it's great when they need to look up a specific one, because all they need to do is generate a query that gos WHERE IS_THING_X = 1.

There are tens of reference data entities, each containing up to hundreds of rows (never into the thousands). They don't feel they can trust the code column to be immutable since it has to match a column that's controlled by another system (even though they're comfortable basing SQL joins on that same column, and it's always unique in the master system) and they're not comfortable collapsing all those IS_THING_* columns into a single field that references an enum or table of known codes or anything else I could think of to suggest, even though we have absolute control all of those columns and no other system cares about them (or knows they exist) at all.

I'm pretty sure this is the second worst idea I've seen in real life, but I can't convince my colleagues. They're not bad developers and they're way better than this, and I'm really not sure why I can't explain to them why this is a really bad design.

So I guess my question is: Am I wrong? And if not then what else should I do to convince these people? Because at the moment I'm pretty sure I'd rather look for another job than have my name attached to this mess.

caiman posted:

This is a strange question. It has to do less with programming and more with your mental state as a result of programming. I'm fairly new to this and lately I've been doing a lot of JavaScript and PHP coding at home in my spare time. When I code, I find myself absolutely immersed in it. We're talking trance-like, full mental attention. I'm sure that's normal. But I also find myself frustrated if I'm struggling with a particular problem and I'm unable to solve it before the day is over or I have to quit for whatever reason. I mean, VERY frustrated, like I can barely get on my with my day/evening, and I can't get my mind off of it to save my life. I'm uncommunicative and pissy with people for at least a couple hours. I just can't shake that relentless nagging feeling that I just HAVE to figure it out, and until I do nothing else matters.

My question: First, do you all experience this? And if so, how do you deal with it? Is this just a symptom of being a coding newbie? Am I just too wrapped up in it? Is smoking pot the solution?

movax posted:

I don't get pissy at people, but unsolved problems will just kinda bounce around in my head for the rest of the day and while I sleep. More than once I've turned the car around leaving from work because the solution (or an idea) finally hits me on the drive home and I want to give it a try before it leaves my head.

Sounds like you just need to move to WA or CO and smoke a bowl after hitting a roadblock, and let the solution come to you

caiman posted:

Sab669 posted:

This isn't programming necessarily, but would it be 'kosher' if I were to use my work laptop for free lance development? There's some pretty handy, pretty expensive tools we use for publishing updates and some packages of more fancy windows forms controls and stuff that I'd love to be able to use. I suppose it depends on my boss and the actual license of the software, but has anyone done it?

Sab669 posted:

This isn't programming necessarily, but would it be 'kosher' if I were to use my work laptop for free lance development? There's some pretty handy, pretty expensive tools we use for publishing updates and some packages of more fancy windows forms controls and stuff that I'd love to be able to use. I suppose it depends on my boss and the actual license of the software, but has anyone done it?

nielsm posted:

I don't see why the root node shouldn't count as an internal node. It's not a leaf, ergo it must be internal.

Hughlander posted:

What do I think? I think that the coding horror thread is over here because that's what you have.

rt4 posted:

Have you configured Apache and PHP to work with Xdebug yet? Does it work at all? Netbeans itself probably isn't the issue.