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• What's your favorite programmable calculator?

  - by Pat Notz

  The HP-32S still holds a soft spot in my heart, even though it only had 4 registers. I have fond memories of writing a nonlinear solver for finding an azeotrope curve during a Thermodynamics final. Despite the increase in power, memory, pixels and features the HP-32G that followed never could steal my heart away. Here's to you, HP-32S. Let's hear it, what's your favorite programmable calculator? As with all poll type questions, do NOT submit a new answer unless your answer is not represented. Vote up your answer instead of adding yet another TI-85 or HP-49 to the list, and add comments to that answer if you want to relate specifics. EDIT: I moved my photo into an answer for polling.

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• When is it ever ok to write your own development tools? (editor into IDE)

  - by mario

  So I'm foremost using a text editor for coding. It's a very bare bones editor; provides mostly just syntax highlighting. But on rare occasions I also need to debug something. And that's when I have to resort to an IDE (mostly Netbeans, but got fiddly Eclipse/Aptana working as second fallback). For general use however IDEs feel not workable to me. It's a visual thing, being used to console UIs etc. And switching back and forth between a text editor and an IDE is slightly cumbersome too. That's why I'm considering extending the editor, not really into a full-fledged IDE - but at the very least integrate a debug feature. Since I'm working on PHP, it seems not that much effort. The DBGp allows to externalize a debug handler from the editor, so it's just minor integration work and figuring out how to shoehorn a breakpoint feature into the editor (joe btw). And while I've also got time to do that, I'm wondering if this is really worthwhile. In this case it's not a needed development tool. It's just for convenience. And the cause for doing it is basically just not liking the existing solution. While over time I might extend and adapt this debugger thing, it initially will be as circumstantial as Eclipse. It inevitably starts out as poor development tool. Furthermore there is likely not much reuse. (Okay, this is not an important point. Most such software exists sans much of a use case. And also obviously, similar extensions already exist for emacs and vim, so it cannot be completely pointless.) But what's a general guideline on attempting to conoct custom development tools, particularily if they are not really needed but satisfy personal preferences? (Usability enhancement not certain.)

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• Task vs. process, is there really any difference?

  - by DASKAjA

  Hi there, I'm studying for my final exams in my CS major on the subject distributed systems and operating systems. I'm in the need for a good definition for the terms task, process and threads. So far I'm confident that a process is the representation of running (or suspended, but initiated) program with its own memory, program counter, registers, stack, etc (process control block). Processes can run threads which share memory, so that communication via shared memory is possible in contrast to processes which have to communicate via IPC. But what's the difference between tasks and process. I often read that they're interchangable and that the term task isn't used anymore. Is that really true?

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• Unique serial number in a java web application.

  - by Zenzen

  I've been wondering what's the correct practice for generating unique ids? The thing is in my web app I'll have a plugin system, when a user registers a plugin I want to generate a unique serial ID for it. I've been thinking about storing all numbers in a DB or a file on the server, generating a random number and checking whether it already exists in the DB/file, but that doesn't seem that good. Are there other ways to do it? Would using the UUID be the preferred way to go?

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• Manually force touch points to reset in Windows 8?

  - by loyalpenguin

  Hi I developed a HTML5/JAVASCRIPT app that is supported using advertisement for the Win8 store. I just by chance happened to notice that if you touch the screen, drag your finger over the advertisement, and release your finger on top of the advertisement that the specific touch is not released and instead when you touch again it registers as a separate touch. This has caused my app to behave expectantly when the user interacts with the app using touch. I wanted to know if it was possible to force the touches to reset so that when the user touches the screen again it is always using "Touch(0)".

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• Nvidia GeForce Gt-520M-cn on intel dh61ww Ubuntu 12.04

  - by j goseeped

  hi people i hope you can help a little bit , i appreciate your time look: i have a this desktop i7 2600, 8gb ram ddr3, board intel dh61ww, Geforce Nvidia GT520-cn 2Gb ddr3, i just install ubuntu 64bits 12.04 kernel 3.2.0-23-generic , i want to setup two monitors samsung led 22" and get start mi video card 1) i download and installed nvidia driver 295.59 and also try with 302.17 to apt-update and upgrade, apt-get install build-essential linux-headers-$(uname -r), apt-get remove --purge nvidia*, apt-get remove --purge xserver-xorg-video-nouveau, vim /etc/modprobe.d/blacklist.conf blacklist vga16fb blacklist nouveau blacklist rivafb blacklist nvidiafb blacklist rivatv sh NVIDIA.run, sudo service lightdm start, reboot, nvidia-xorgconf 2)after reboot i get 800x600 and nvidia-settings say this. You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run nvidia-xconfig as root), and restart the X server. 3) i change a little bit xorg.conf to set up a resolution to work property 4) i dont have any image in the monito and i dont have any option on Nvidia X server settings lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 520] (rev a1) egrep -i 'glx|nvidia' /var/log/Xorg.0.log [ 12.005] (II) LoadModule: "glx" [ 12.005] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so [ 12.575] (II) Module glx: vendor="NVIDIA Corporation" [ 12.585] (II) NVIDIA GLX Module 302.17 Tue Jun 12 16:22:45 PDT 2012 [ 12.585] (II) Loading extension GLX [ 13.037] (EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found) [ 13.044] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=3 (/dev/input/event10) [ 13.044] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=7 (/dev/input/event9) glxinfo | grep direct Xlib: extension "GLX" missing on display ":0.0". Error: couldn't find RGB GLX visual or fbconfig sorry my english is no very well. and thanks guys

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• Working with QWords

  - by Glenn1234

  I'm learning and in the course of that working on an assembler conversion which uses QWORDs a lot (x86-32bit). Now my reference material doesn't have anything on working with such values beyond the obvious of splitting them up into the 32-bit registers. I guess they're on the old side. The newer processors have mmx and sse instructions and the like. Would I be served well to look into those instructions for solving this? What is the best way to handle doing work on QWORD values?

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• How Flask loads blueprint internaly?

  - by Ignas B.

  I'm just interested how Flask's blueprints gets imported. It still imports the python module at the end of all the stuff done by Flask and if I'm right python does two things when importing: registers the module name in the namespace and then initialize it if needed. So if Flask blueprint is initialized when it gets registered, so all the module then is in memory and if there are lots of blueprints to register, the memory just gets wasted, because in one request basically you use one blueprint. Not a big loss but still... But if it is only registered in the namespace and initialized only when needed (when the real request reaches it), then it make sense to register them all at once (as is the recommended way I understood). This is I guess the case here :) But just wanted to ask and understand a bit deeper.

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• .NET Database application guidance.

  - by Wally

  Hello, I'm stumbling in the data wilderness and feel very lost, so i am asking for help. I have done some database apps in VS (C#) winforms for some time, wpf lately. These are small to medium apps (embedded dbs, a bit of sql server), like a restaurants, cash registers and similar. (15-20 tables) Until now, i have done all my datasets by drag and drop in Visual Studio designer. I spent weeks on web trying to find some complete solution how to write complete solution with typed datasets by hand from scratch (DAL, B.Objects) in hope to learn some architecture patterns along the way, but without success. So, finally question. Can someone recommend me what to learn for this type of applications, maybe move away from datasets , use some ORM ( maybe overkill, i dont know). Point me in some direction please.

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• PNRP + dont see Global_ on Windows 7

  - by schmoopy

  Hi, Im trying to test out PNRP in a simple app that either registers or resolves. On my Vista machine when i run 'netsh p2p pnrp cloud show list' .... I see Global_ When i try this from my Windows 7 machine i do not see Global_ i only have LinkLocal_... I can see i have an IPV6 address on the Windows 7 machine (via ipconfig) I may not just understand it enough yet - very poorly documented and most of the documentation is from Orca, 2007,etc. Makes me wonder if PNRP will just end up being another uddi.microsoft.com (i know they are nothing alike, but my point is...)

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• Good books or tutorials on building projects without an IDE?

  - by CodexArcanum

  While I'm certainly under no illusions that building software without an IDE is possible, I don't actually know much about doing it well. I've been using graphical tools like Visual Studio or Code::Blocks so long that I'm pretty well lost without them. And that really stinks when I want to change environments or languages. I couldn't really do anything in D until someone made a Visual Studio plugin, and now that I'm trying to do more development on Mac, I can't use D again because the XCode plugins don't work. I'm sick of being lost when I see a .make file and having no idea what I'm supposed to do with a folder full of source files. People can't be compiling them one by one using the console and then linking them one by one. You'd spend more time typing file names than code. So what are the automation and productivity tools of the non-IDE user? How do you manage a project when you're writing all the code in emacs or vim or nano or whatever? I would love it if there was a book or a guide online that spells some of this out.

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• How to Use PortT( ie GPIO) of MC9S12XDP512 microcontroller in MPC860 microprocesser code ?

  - by sagar

  Hi, Can u please guide me, how to access GPIO's of MC9S12XDP512 microcontroller in MPc860 microprocesser. In project MC9S12XDP512 microcontroller is connected with MPC860 mp through one connector, means we can have facility to access any registers from microntroller to microprocesser and vice versa by use of IMMR or CPM feathers. But i dont know how to use that to access resisters in MPC860. But i wish to use one gpio of MC9S12XDP512 microntroller in MPC860 code ( in C langanuge) to do some other operations. Please let me know if you have idea.

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• It is inconsiderate to place editor settings inside code files?

  - by Carlos Campderrós

  I know this is kind of a subjective question, but I'm curious if there's any good reason to place (or not place) editor settings inside code files. I'm thinking in vi modelines, but it is possible that this applies to other editors. In short, a vi modeline is a line inside a file that tells vi how to behave (indent with spaces or tabs, set tabwidth to X, autoindent by default or not, ...) that is placed inside a comment, so it won't affect the program/compiler when running. In a .c file it could be similar to // vim: noai:ts=4:sw=4 On one hand, I think this shouldn't be inside the file, as it is an editor setting and so belongs to an editor configuration file or property. On the other hand, for projects involving developers outside one company (that are not imposed an editor/settings) or collaborators on github/bitbucket/... it is an easy way to avoid breaking the code style (tabs vs spaces for example), but only for the ones that use that editor though. I cannot see any powerful enough reason to decide for or against this practice, so I am in doubt of what to do.

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• Is C# development effectively inseparable from the IDE you use?

  - by Ghopper21

  I'm a Python programmer learning C# who is trying to stop worrying and just love C# for what it is, rather than constantly comparing it back to Python. I'm really get caught up on one point: the lack of explicitness about where things are defined, as detailed in this Stack Overflow question. In short: in C#, using foo doesn't tell you what names from foo are being made available, which is analogous to from foo import * in Python -- a form that is discouraged within Python coding culture for being implicit rather than the more explicit approach of from foo import bar. I was rather struck by the Stack Overflow answers to this point from C# programmers, which was that in practice this lack of explicitness doesn't really matter because in your IDE (presumably Visual Studio) you can just hover over a name and be told by the system where the name is coming from. E.g.: Now, in theory I realise this means when you're looking with a text editor, you can't tell where the types come from in C#... but in practice, I don't find that to be a problem. How often are you actually looking at code and can't use Visual Studio? This is revelatory to me. Many Python programmers prefer a text editor approach to coding, using something like Sublime Text 2 or vim, where it's all about the code, plus command line tools and direct access and manipulation of folders and files. The idea of being dependent on an IDE to understand code at such a basic level seems anathema. It seems C# culture is radically different on this point. And I wonder if I just need to accept and embrace that as part of my learning of C#. Which leads me to my question here: is C# development effectively inseparable from the IDE you use?

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• How to setup Expression Blend 3 add-in window at certain position ?

  - by j23tom..pl

  For example in Sketchflow add-in there is ApplicationFlowPane (derrived from PrototypingPane) which registers itself using IWindowService like this: service.RegisterPalette(this.PaletteRegistryName, this, this.Caption, this.KeyBinding); But i can't see where it is defined that it is docked on bottom pane. Before someone replies that it's at: %AppData%\Microsoft\Expression\Blend3\Workspaces No it's not there because those files do not exists at first run. The question is how can i put my window at certain position with Expression Blend 3 plug-in api ? update 1: It seems that to achive what i want i have to change design.xaml (where workspaces are defined) which is loaded from satellite assembly Microsoft.Expression.Blend.resources.dll (method load in class FrameworkPackage in Microsoft.Expression.Blend.dll). But since this dll is strongly named i can't change it. So now the question is. Is there any other way I can change Design Workspace at runtime ?

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• How can I define custom keyboard mappings to resize, move, and manage windows?

  - by fumon

  I just returned to ubuntu (13.04) after a year using OS X exclusively. I love the improvements that have come to ubuntu and unity, and I'm glad to be back. There's just one thing, though... Slate is a simple OS X tool that allows users to quickly create powerful keyboard macros and really take advantage of their screen space. I have to say I was spoiled by it. Even on a tiny laptop, my workflow was never interrupted by changing workspaces or leaving the keyboard to adjust a window, because perfect adjustment was a keystroke or two away. For example: bind h:ctrl;alt;cmd resize -10% +0 # this increases the window's left width by 10% bind h:shift;alt nudge -10% +0 # this moves the window left by 10% You make a big config file, and like vim, tmux, and everything else, it just becomes muscle memory. I can't seem to find a way to achieve anything close to this in linux or ubuntu. I've tried to make do with compiz window settings and the built-in stuff Ubuntu offers, but it's not even in the same realm. Although to be fair, this level of tuning isn't something most people care about. Thanks, guys. :) Any feedback would be appreciated.

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• Factory vs instance constructors

  - by Neil N

  I can't think of any reasons why one is better than the other. Compare these two implementations: public class MyClass { public myClass(string fileName) { // some code... } } as opposed to: public class MyClass { private myClass(){} public static Create(string fileName) { // some code... } } There are some places in the .Net framework that use the static method to create instances. At first I was thinking, it registers it's instances to keep track of them, but regular constructors could do the same thing through the use of private static variables. What is the reasoning behind this style?

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• What's a good place to unregister an observer from the notification center?

  - by mystify

  When I add an observer to the default notification center, where would I unregister that? Example: I have a UIView subclass which lives inside a view controller. That subclass is an observer for the FooBarNotification. If this notification is posted, that view will get it. But now, the view controller decides to throw away the view. Is the best place the -dealloc method of the view itself? Are there any rules like memory management rules? For example: Must I unregister an observer where I registered it? i.e. the view registers itself in it's init method, so it should unregister itself in it's -dealloc method? (not talking about push notifications, but NSNotificationCenter)

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• How to configure Spring-DM OSGi service for new instance per call?

  - by Bhav

  I'm starting to delve into using Spring DM and OSGi services in an RCP application. I've created a service which is used by another bundle in the RCP application. It does a lookup of the service via calls to getBundleContext().getServiceReference() using the explicit bundle names and service class names. I'm not using DI anywhere yet. The issue I'm running into is that the service that is returned in the requesting bundle is a singleton. At times I notice a threading issue since it is a "stateful" service. How do I configure the application to get back a new service instance with each call? Here is my spring xml file contents which registers the service: <bean id="myServBean" class="com.xyz.ClassImpl"/> <osgi:service ref="myServBean" class="com.xyz.Class"/>

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• Using sessions & session variables in a PHP Login Script

  - by user1325291

  I have just finished creating an entire login and register systsem in PHP, but my problem is I haven't used any sessions yet. (Like, there's not the word "session" in the entire script). I'm kind of a newbie in PHP and I've never used sessions before. What I want to do it, after the user registers and fills out the login form, they will still stay on the same page. So, like one half of the page will be if the session is logged_in and the other part will be else (the user is not logged in so display the login form). I also want to create session variables which will hold the username and password given at login. Thanks in advance! BTW this is my website - CP Cheats

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• Django and a referrer system question

  - by Hellnar

  Hello, I am trying develop a basic referrer system to my Django website, system will be generating a unique url for each users to share with their friends. Once these friends enter this website, system somehow keep the data that "this user is browsing by the reference of X user" and once this invited person decided to register for an account, system will save this information (maybe as an extra Foreign Key of the inviting user in the UserProfile model) Now how can I keep track of the inviting user from the moment entering using the referred link to the point where he/she registers to the site. Would session framework work on this? If not how could this be done ?

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• functions in assembler

  - by stupid_idiot

  hi, i have philosophised about the purpose of stack a little bit and after some coding i figured out what is it's strength. The only thing that lies in my stomache is how does it work with functions? I tried to make some easy function for adding two numbers using universal registers but I suppose that's not how does it work in C for example.. where are all the parameters, local variables and where is the result stored? how would you rewrite this to assembler?(how would compiler for C rewrite it?) int function(int a, int &b, int *c){ return a*(b++)+(*c); } i know this example kinda sucks.. but this way i can understand all the possibilities

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• I'm trying to implement 2 factor authentication on the cheap. How would I do that?

  - by Biff MaGriff

  Ok so I need 2 of the 3. Something the user knows. Something the user has. Something the user is. I have a system that is exposed to the internet and we need clients to connect in a secure manner to satisfy our security standards. I'm thinking when a user registers to use our system we send them an application that they install on their home system. The application generates a key based on a timed randomness algorithm. Our application server has the same algorithm so when the user submits their credentials with the key we know that they are a legitimate user. Is this a valid method of 2 factor authentication? What is another way of doing this? Are there any pitfalls that I should be aware of? Thanks for your help!

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• How? Encrypt and Decrypt user membership passwords in ASP.NET

  - by smdrager

  We are creating a new site using ASP.NET membership provider for user registration and log in. Our old system encrypted user passwords so that we could recover them if we needed to. I am having a great deal of trouble figuring out if it is possible to use ASP.NET membership functions to simply encrypt the password when the user registers and then unencrypt it so I can see it. Documentation for this is neigh non-existant. I know how to configure Web.config to have it store passwords as encrypted ala passwordFormat="Hashed" in the provider and assigning a validationKey in the machineKey, however it seems like the password still gets hashed (though perhaps it is just well encrypted). Either way I cannot decifer how the password can be recovered (by us) if neccessary. Thanks!

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• Registering a piece of script across all the SharePoint Pages

  - by NLV

  Hello all I've a business requirement in which i need to create a SharePoint feature which registers a JavaScript across all the SharePoint pages. The only way i figured out to achieve it is that adding the script in (all) the SharePoint Master Pages or any other custom master pages present in the Site/Site Collection/Web Application while activating the feature. But i found that editing the master pages to add a Javascript snippet is not feasible. Finally i found that i could register my custom controls in the "Delegate Controls" and the custom user control i created can in turn register my script in the page. But my question is how can i handle it if the master page does not have a delegate control? Or is there any other possible solution to register a script across all the SharePoint pages?

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