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  • Entry level engineer question regarding memory mangement

    - by Ealianis
    It has been a few months since I started my position as an entry level software developer. Now that I am past some learning curves (e.g. the language, jargon, syntax of VB and C#) I'm starting to focus on more esoteric topics, as to write better software. A simple question I presented to a fellow coworker was responded with "I'm focusing on the wrong things." While I respect this coworker I do disagree that this is a "wrong thing" to focus upon. Here was the code (in VB) and followed by the question. Note: The Function GenerateAlert() returns an integer. Dim alertID as Integer = GenerateAlert() _errorDictionary.Add(argErrorID, NewErrorInfo(Now(), alertID)) vs... _errorDictionary.Add(argErrorID, New ErrorInfo(Now(), GenerateAlert())) I originally wrote the ladder and rewrote it with the "Dim alertID" so that someone else might find it easier to read. But here was my concern and question. "Should one write this with the Dim AlertID, it would in fact take up more memory; finite but more, and should this method be called many times could it lead to an issue? How will .NET handle this object AlertID. Outside of .NET should one manually dispose of the object after use (near the end of the sub)." I want to ensure I become a knowledgeable programmer that does not just rely upon garbage collection. Am I over thinking this? Am I focusing on the wrong things?

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  • What is a Coding Dojo?

    - by huwyss
    Recently i found out that there is a thing called "coding dojo". The point behind it is that software developers want to have a space to learn new stuff like processes, methods, coding details, languages, and whatnot in an environment without stress. Just for fun. No competition. No results required. No deadlines.Some days ago I joined the Zurich coding dojo. We were three programmers with different backgrounds.We gave ourselves the task to develop a method that takes an input value and returns its prime factors. We did pair programming and every few minutes we switched positions. We used test driven development. The chosen programming language was Ruby.I haven't really done TDD before. It was pretty interesting to see the algorithm develop following the testcases.We started with the first test input=1 then developed the most simple productive program that passed this very first test. Then we added the next test input=2 and implemented the productive code. We kept adding tests and made sure all tests are passed until we had the general solution.When we improved the performance of our code we saw the value of the tests we wrote before. Of course our first performance improvement broke several tests.It was a very interesting experience to see how other developers think and how they work. I will participate at the dojo again and can warmly recommend it to anyone. There are  coding dojos all over the world.Have fun!

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  • Internet unusably slow with Realtek Semiconductor Co., Ltd. RTL8111/8168B card

    - by user42424
    So I have recently installed Ubuntu 11.10 for a dual boot with wind 7. After the install I had like 300 updates, so I installed them. At first I could use the internet, although it was extremely slow. However now I cannot, sometimes it will load and others it will simply time out. When I try to download something it will either take forever or will not at all. This is a wired system. On Windows side my speeds are fine. Any help would be greatly appreciated. Also like I said I am new to Linux/Ubuntu so please be nice. One last thing, I also installed 11.10 for same dual boot on my laptop, and wireless speed is the same as on Windows? Only the wired desktop gives me the problem? Hear is some hardware info.. Hope it helps. Mobo: Gigabyte GA=880GMA- AMD / CPU: AMD Phenom (tm) IIx4 965 / 16 GB Ram / Realtek PCIe GBE Family Controller / Cisco Linksys E2000 / Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) / eth0 Link encap:Ethernet HWaddr 50:e5:49:33:64:cf inet addr:192.168.1.118 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::52e5:49ff:fe33:64cf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:76722 errors:0 dropped:76722 overruns:0 frame:76722 TX packets:49692 errors:0 dropped:65 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:107956638 (107.9 MB) TX bytes:4342553 (4.3 MB) Interrupt:44 Base address:0x2000 thanks to roadmr problem solved! I powered down PC, un plugged power from pc end, waited a few (maybe 3)minutes. plugged power back in, pushed and held power button for 30 + seconds. Let go, powered on PC, and my Internet is fine! downloads and web speed blaze, just like on my Win 7 boot, maybe even faster. Problem Solved, Thanks to all!! **

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  • Few questions on giga tweaker

    - by user23950
    I better consult first the people here before I do anything unnecessary using this app called giga tweaker. I don't really understand what this increase the performance of your CPU thing. It is under Customization-Memory Management-ram & disk cache of giga tweaker. What will happen if I change the level cache size of l2 cache into the highest possible value which is 8Mb. What are the negative effects of doing it? The file system caching memory, still under Customization-Memory Management-ram & disk cache. What effects will it have on my system which has 2Gb of Ram and 2.50 Ghz of Dual Core CPU. Please enlighten me.

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  • How to slave a 3.5" 500gb sata external hdd(Western Digital) to my dell Inspiron laptop

    - by AJ HDD
    i have a 3.5" western digital my book 500gb external hdd....i gave it to a friend of mine and he broke the usb port in it...i went to a nearby comp repair shop and had him solder the thing...it didnt detect when i plugged it in my dell inspiron laptop........i recently saw about the 3.5" sata to usb enclosure, so i went to check it....strangely when its placed in the enclosure, its not detecting in windows...also when it was put as secondary(im guessing slave) to the shop fellow's desktop it shows up in the bios and starting, but then again doesnt show in windows 7, and the guy told me i need to data recovery to get teh data back p.s.the wd hdd doesnt have os, just data, soo my question is: can i slave the drive to my dell laptop and try to recover the data....if so how? please i would really appreciate it...thanks in advance

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  • X200 Tablet notebook won't start after BIOS Update

    - by THEn
    I have LENOVO X200 Tablet and I ran the BIOS Update and the computer won't start after the BIOS update. When I ran the BIOS update utility it ran everything fine and asked to restart the computer but it wont start screen is blank. I unplugged the power and took of the battery and put them back and still not starting. Now it has [Power On] indicator light on and screen is not starting. I tried pressing F1 button while trying to start the computer but it doesn't do react to anything. Please help how I can start my Tablet. The update utility is http://support.lenovo.com/en_US/downloads/detail.page?LegacyDocID=MIGR-70651 Does any body know if X200 have any kind of hardware switch to reset the BIOS or any thing? What would be the best way to fix my BIOS? Thank you.

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  • How to pin NetBeans to Windows 7 taskbar?

    - by Vilx-
    I've googled around and it seems that I'm not the only one with the problem, however I couldn't find the solution. Maybe someone around here has figured it out. The problem is that netbeans.exe is actually a stub which is calling javaw.exe. When I try to pin the NetBeans process to the taskbar I actually pin "Java(TM) Platform SE Binary". That changes the icon and the pin doesn't work. The funny thing is that it works on another machine. I don't know whether it's because it's a different version of NetBeans, or a different version of Java. Has anyone figured this out? Added: I know this is sort of not programming related; on the other hand there are plenty of topics around here about how to better your programming environment, and this one is no worse than those. Oh, and btw - Windows 7 Enterprise x64; Java JDK 1.6.17; Netbeans 6.8

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  • Debugger for file I/O development?

    - by datenwolf
    Okay, the question title may be a bit cryptic. But it aptly describes what I'm looking for: I think every experienced coder went through this numerous times: You get a binary file format specification, you implement the reader for it, and… nothing works like expected. So you run your code in the debugger, go execute through the code line by line, every header field is read in seemingly correct, but when it comes to the bulk data, offset and indices no longer match up. What would really help in this situation was a binary file viewer, that shows you the progress of your file pointer, as you step through the code, and ideally would also highlight all memory maps. Then you could see the context of the current I/O operations, most notably those darn "off-by-one" mistakes, which are even more annoying when reading a file. Implementing such a debugger should not be too hard. traces on the process' file descriptors/handles and triggers on the I/O functions, to update the display. Only: I don't know of such a kind of debugger to exist. Do I just lack knowledge about the existance of such a tool, or is there really no such thing?

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  • What individual needs to be aware when signing a NDA with client?

    - by doNotCheckMyBlog
    I am very new to IT industry and have no prior experience. However I came into contact with a party who is gear to build a mobile application. But, they want me to sign NDA (No Disclosure Agreement). The definition seems vague, The following definitions apply in this Agreement: Confidential Information means information relating to the online and mobile application concepts discussed and that: (a) is disclosed to the Recipient by or on behalf of XYZ; (b) is acquired by the Recipient directly or indirectly from XYZ; (c) is generated by the Recipient (whether alone or with others); or (d) otherwise comes to the knowledge of the Recipient, When they say otherwise comes to the knowledge of the recipient. Does it mean if I think of any idea from my own creative mind and which is similar to their idea then it would be a breach of this agreement? and also is it okay to tell to include application name in definition as currently to me it sounds like any online of mobile application concept they think I should not disclose it to anybody. "Confidential Information means information relating to the online and mobile application concepts discussed and that:" I am more concerned about this part, Without limiting XYZ’s rights at law, the Recipient agrees to indemnify XYZ in respect of all claims, losses, liabilities, costs or expenses of any kind incurred directly or indirectly as a result of or in connection with a breach by it or any of its officers, employees, or consultants of this Agreement. Is it really common in IT industry to sign this agreement between client and developer? Any particular thing I should be concerned about?

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  • Dynamic Jump spot

    - by Pasquale Sada
    I have an initial velocity V(Vx,Vy,VZ) and a spot where he stands still at S(Sx,Sy,Sz). What I'm trying to achieve is a jump on a spot E(Ex,Ey,Ez) where you have clicked on(only lower or higher spot, because I've in place a simple steering behavior for even terrains). There are no obstacle around. I've implemented a formula that can make him jump in a precise way on a spot but you need to declare an angle: the problem arise when the selected spot is straight above your head. It' pretty lame that the char hang there and can reach a thing that is 1cm above is head. I'll share the code I'm using: Vector3 dir = target - transform.position; // get target direction float h = dir.y; // get height difference dir.y = 0; // retain only the horizontal direction float dist = dir.magnitude ; // get horizontal distance float a = angle * Mathf.Deg2Rad; // convert angle to radians dir.y = dist * Mathf.Tan(a); // set dir to the elevation angle dist += h / Mathf.Tan(a); // correct for small height differences // calculate the velocity magnitude float vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 *a)); return vel * dir.normalized;

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  • Windows 8.1 backlight turns off

    - by tenhouse
    This is one of the strangest things I have ever seen. I have an HP Elitebook 8460p and recently updated my Windows 8 to Windows 8.1. Now when I have certain windows open and focused (it's always different, sometimes it's chrome, sometimes it's the control-panel and so on, there is no clear pattern) the backlight of the screen is completely turned off - when I take a torch and point it to the screen or hold it to a bright-light source I can see there is still a picture there you can even work (or better said you cuold if you'd see anything). When I tab to certain other windows the screen goes back to normal back light - I can then tab back to the other window and the backlight will be turned off again. I have no idea what's going on and also no idea what information you need. The display-adapter I got is the AMD Radeon HD 6400M - I tried updating to the newest driver but that didn't help. Here's a video of the whole thing: http://www.youtube.com/watch?v=kIV_Q8uayUA

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  • Sound card doesn't work and yet does.

    - by Xeoncross
    I have a really weird one tonight. Today we had a LAN party and all of a sudden the sound on a couple PC's stopped working for programs like the games, windows media player, etc. However, when errors would popup (like trying to change the volume settings) you would here the default error chime. Restarting the computers you would here the logoff-login sounds and after a restart the sound would work for a bit in both games and apps and then suddenly stop. Restarting also didn't always fix the problem. I can't figure this out. If the sound card/driver didn't work then how could we hear sounds from the windows sound scheme? No sound with VLC, windows media player, youtube, games, nothing. The only thing I can figure out is that this is a bad game crashing the primary driver or some kind of weird virus these PC's might have picked up.

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  • Read ahead buffering while playing video file from optical disc

    - by Saxtus
    I was wondering if there is a program for Windows 7 (64-bit), that reads ahead the file to be played back (usually MKV files in my case) to the RAM, so the disc that the video file resides in, won't spin for the entire duration of the playback, but only every time the cache is almost empty (with big enough cache so it won't need the drive for long periods). A program that I've used in the past (called DVDIdle), was doing that universally for every video player I wanted, but they've stopped updating it 6 years ago and now it doesn't seem to work with Windows 7 (tried using compatibility mode too). The method I am using now, is to either have the drive wearing down and buzzing all the time or manually copy the entire file to HDD, SSD or RamDisk and play it from there. The closest thing I've found, is a software that slows down the drive's spin speed, but I was looking for something more convenient, automated, without waiting for an entire file to be copied before starting playback or needing any HDD space, like I've used to in the past. Thanks in advance.

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  • CentOS send mail with external SMTP server and without local daemons

    - by Vilx-
    I've got a little old server with CentOS 6.5 on it. The hardware is old and crappy, but enough for what it has to do. Which consists of SSH (+SFTP), Apache, PHP and MySQL. Still, I'm trying to cut away all that I can. One thing that it does not need to do is to be an SMTP server. There are no mailboxes on it and nobody will ever route mail through it. However I do want it to send me an email when something goes wrong. Also, the webpages will send emails from PHP. So that brings me to the question - can I set up the mail system in such a way that there isn't an expensive mailer daemon sitting in the background with queues and whatnotelse, but rather every email is directly and immediately delivered to an external SMTP server? And how do I go about it?

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  • Why is my ftp connection timing out?

    - by NEPatriot
    This is the log info: Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is your current location Command: TYPE I Response: 200 TYPE is now 8-bit binary Command: PASV Response: 227 Entering Passive Mode (173,201,145,1,199,43) Command: MLSD Error: Connection timed out Error: Failed to retrieve directory listing The strange thing is that I've set the transfer mode to active... I've called my hosting company support and they're able to connect to this server using my ftp credentials. I've also tried to connect on another machine on my network and have the same issue. Could it be the firewall? My ISP?

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  • filtering dates in a data view webpart when using webservices datasource

    - by Patrick Olurotimi Ige
    I was working on a data view web part recently and i had  to filter the data based on dates.Since the data source was web services i couldn't use  the Offset which i blogged about earlier.When using web services to pull data in sharepoint designer you would have to use xpath.So for example this is the soap that populates the rows<xsl:variable name="Rows" select="/soap:Envelope/soap:Body/ddw1:GetListItemsResponse/ddw1:GetListItemsResult/ddw1:listitems/rs:data/z:row/>But you would need to add some predicate [] and filter the date nodes.So you can do something like this (marked in red)<xsl:variable name="Rows" select="/soap:Envelope/soap:Body/ddw1:GetListItemsResponse/ddw1:GetListItemsResult/ddw1:listitems/rs:data/z:row[ddwrt:FormatDateTime(string(@ows_Created),1033,'yyyyMMdd') &gt;= ddwrt:FormatDateTime(string(substring-after($fd,'#')),1033,'yyyyMMdd')]"/>For the filtering to work you need to have the date formatted  above as yyyyMMdd.One more thing you must have noticed is the $fd variable.This variable is created by me creating a calculated column in the list so something like this [Created]-2So basically that the xpath is doing is get me data only when the Created date  is greater than or equal to the Created date -2 which is 2 date less than the created date.Also not that when using web services in sharepoint designer and try to use the default filtering you won't get to see greater tha or less than in the option list comparison.:(Hope this helps.

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  • Link to a folder in the top Ubuntu panel

    - by Seamus
    Hi. I like the little top panel thing in Ubuntu. I have links to all my most used programs on there. (Which is why I don't see the point of docky or any of those things: they seem to do the same job, but they're messier). What I'd like is to have a little icon for my documents folder up there too. But I don't seem to be able to do it. It's not one of the options listed when you go to "add to panel...". Am I missing something ridiculously easy?

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  • Problems dualbooting Ubuntu because of UEFI

    - by Koffeehaus
    I have an X-series Asus laptop which I just bough about a month ago. I want to dualboot Ubuntu - Windows. I can easily access LiveUSB with both UEFI enabled and disabled. I heard that there were problems with UEFI, so I disabled it. After I've installed the system I couldn't access it. It just boots to Windows straight. Another unusual thing, that never happened to me before was that the partition editor wanted me to create a BIOS reserved area, which I did, but not at the beginning of the table. Any ideas how to access the Ubuntu partition? As far as I can guess both Windows and Ubuntu have to be both of the same type of boot, either Legacy or EFI. This is not the case of what I have now. So, if I reinstall Ubuntu in UEFI mode that correlates with my Windows type, will I then be able to boot into it? I have a constraint, my laptop doesn't have a CD ROM, so I cannot reinstall WIndows, nor can I move around the Windows recovery partition. This is the boot-repair report : http://paste.ubuntu.com/1354254/

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  • Will you choose JavaFX for Development?

    - by javafx4you
    A few weeks ago, a poll on the home page of java.net caught my eyes, because it was related to JavaFX. Its title: Will you use JavaFX for development once it's fully ported to Mac and Linux platforms? Usually, the results for this type of polls are published on the editor's Daily Blog soon after the poll closes. For some reason, this didn't happen for the JavaFX poll, so I'll take a shot at interpreting the results.  The results found on java.net look pretty close to the following: Although this way to look at the results already gives us an idea of how much traction JavaFX is getting, there are just too many type of answers that make it hard to read. The answers "maybe" and "I don't know" are awfully similar, so I'm tempted to collapse these together. Then there is "No, I don't do that type of development" that just doesn't belong here, as obviously developers who ave chosen this answer don't develop Rich Internet Apps, and therefore I will adapt the % results accordingly. Finally, I've been tempted to combine the top three categories just t simplify the results. This gives me the following chart:  Whether you prefer the original graph, or my simplified take on it, one thing is sure:  less than 10% of developers who have taken this poll plan to stick to another toolkit (presumably Swing or SWT), while the vast majority is inclined to use JavaFX. When you take into account that JavaFX 2.0 is pretty much a "new" API (no more JavaFX Script), I think these are some pretty good results, 6 months after the official release of JavaFX 2.0.

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  • Web Site Monitoring/Tracking Freeware

    - by jsmith
    I need to be able to track Web Sites visited on a computer and send them to an email address on a daily basis. Keylogger software seems like too much, I want something lightweight that simply monitors websites visited and forwards them on. I was hoping for freeware, but if it's cheap/simple and easy to use I'm willing to pay. I know similar questions have been asked about website traffic monitoring, but it's not quite the same thing, and I can't seem to find an answer to this question anywhere. Thank you ahead of time.

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  • How to sync client and server at the first frame

    - by wheelinlight
    I'm making a game where an authoritative server sends information to all clients about states and positions for objects in a 3d world. The player can control his character by clicking on the screen to set a destination for the character, much like in the Diablo series. I've read most information I can find online about interpolation, reconciliation, and general networking architecture (Valve's for instance). I think I understand everything but one thing seems to be missing in every article I read. Let say we have an interpolation delay of 100ms, server tickrate=50ms, latency=200ms; How do I know when 100ms has past on the client? If the server sends the first update on t=0, can I assume it arrives at t=200, therefore assuming that all packets takes the same amount of time to reach the client? What if the first packet arrives a little quick, for instance at t=150. I would then be starting the client with t=150 and at t=250 it will think it has past 100ms since its connect to the server when it in fact only 50ms has past. Hopefully the above paragraph is understandable. The summarized question would be: How do I know at what tick to start simulating the client? EDIT: This is how I ended up doing it: The client keeps a clock (approximately) in sync with the server. The client then simulates the world at simulationTime = syncedTime - avg(RTT)/2 - interpolationTime The round-trip time can fluctuate so therefore I average it out over time. By only keeping the most recent values when calculating the average I hope to adapt to more permanent changes in latency. It's still to early to draw any conclusion. I'm currently simulating bad network connections, but it's looking good so far. Anyone see any possible problems?

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  • SQUID Transparent SSL proxy (no intercept)

    - by user974896
    I know how to have squid work as a transparent proxy. You put it into transparent mode then use your router or IPTABLES to forward port 80 to the squid port. I would like to do the same for SSL. Every guide I see mentions setting up keys on the squid server. I do not want squid to actually decrypt the SSL traffic then establish a connection with the server, rather I would like squid to simply forward the SSL traffic as is. The only thing I would like to do is be able to check the SSL request for any offending IPs and drop the packets if the destination is one of them.

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  • What's Excel formats are (most) compatible with LibreOffice and Google Docs?

    - by iconoclast
    I use Excel (and occasionally Numbers), but I want to be able to share with users of Google Docs and LibreOffice (and I may want to switch in the future). What's the most compatible format to save my Excel spreadsheets in? I'm asking as a question here rather than merely Googling for a list of formats that LibreOffice and GoogleDocs support (although I'm doing that too, and will post the answer if no one else does) because there are likely to be hidden "gotchas" that only someone who has experience using all of the above applications is going to know about. Answers that include personal experience will be preferred over those that only post a link to the relevant facts on google.com and libreoffice.com. Oh, and of course the other reason I'm asking the question is because it's good to have this info readily available on SuperUser.com for anyone else who wants to know the same thing.

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  • Prefer class members or passing arguments between internal methods?

    - by geoffjentry
    Suppose within the private portion of a class there is a value which is utilized by multiple private methods. Do people prefer having this defined as a member variable for the class or passing it as an argument to each of the methods - and why? On one hand I could see an argument to be made that reducing state (ie member variables) in a class is generally a good thing, although if the same value is being repeatedly used throughout a class' methods it seems like that would be an ideal candidate for representation as state for the class to make the code visibly cleaner if nothing else. Edit: To clarify some of the comments/questions that were raised, I'm not talking about constants and this isn't relating to any particular case rather just a hypothetical that I was talking to some other people about. Ignoring the OOP angle for a moment, the particular use case that I had in mind was the following (assume pass by reference just to make the pseudocode cleaner) int x doSomething(x) doAnotherThing(x) doYetAnotherThing(x) doSomethingElse(x) So what I mean is that there's some variable that is common between multiple functions - in the case I had in mind it was due to chaining of smaller functions. In an OOP system, if these were all methods of a class (say due to refactoring via extracting methods from a large method), that variable could be passed around them all or it could be a class member.

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  • Software Manager who makes developers do Project Management

    - by hdman
    I'm a software developer working in an embedded systems company. We have a Project Manager, who takes care of the overall project schedule (including electrical, quality, software and manufacturing) hence his software schedule is very brief. We also have a Software Manager, who's my boss. He makes me write and maintain the software schedule, design documents (high and low level design), SRS, change management, verification plans and reports, release management, reviews, and ofcourse the software. We only have one Test Engineer for the whole software team (10 members), and at any given time, there are a couple of projects going on. I'm spending 80% of my time making these documents. My boss comes from a Process background, and believes what we need is better documentation to improve software: (1) He considers the design to be paramount, coding is "just writing the design down", it shouldn't take too long, and "all the code should be written before the hardware is ready". (2) Doesn't understand the difference between a Central & Distributed Version control, even after we told him its easier to collaborate with a distributed model. (3) Doesn't understand code, and wants to understand every bug and its proposed solution. (4) Believes verification should be done by developer, and validation by the Tester. Thing is though, our verification only checks if implementation is correct (we don't write unit tests, its never considered in the schedule), and validation is black box testing, so the units tests are missing. I'm really confused. (1) Am I responsible for maintaining all these documents? It makes me feel like I'm doing the Software Project Management, in essence. (2) I don't really like creating documents, I want to solve problems and write code. In my experience, creating design documents only helps to an extent, its never the solution to better or faster code. (3) I feel the boss doesn't really care about making better products, but only about being a good manager in the eyes of the management. What can I do?

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