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• uniform generation of points on 3D box

  - by Myx

  Hello: I would like to generate random points on a 3D box defined by its (minx, miny, minz) and (maxx, maxy, maxz) corners. I was thinking of generating a random point inside of the box and then somehow projecting it onto one of the box sides. However, I don't have explicit plane information for the box sides and this seems like it will not produce a uniform distribution of points since if some sides of the box are bigger than others, those sides should have more points generated on them. Any suggestions are appreciated. Thanks.

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• Python list comprehension to return edge values of a list

  - by mvid

  If I have a list in python such as: stuff = [1, 2, 3, 4, 5, 6, 7, 8, 9] with length n (in this case 9) and I am interested in creating lists of length n/2 (in this case 4). I want all possible sets of n/2 values in the original list, for example: [1, 2, 3, 4], [2, 3, 4, 5], ..., [9, 1, 2, 3] is there some list comprehension code I could use to iterate through the list and retrieve all of those sublists? I don't care about the order of the values within the lists, I am just trying to find a clever method of generating the lists.

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• Use same project to create multiple applications on same device

  - by Mark.Prof

  I am deploying a reader application with it's document packaged in the asset folder. Any branding is done by dynamically generating xml and resources as appropriate. The application name itself is also generated. Since it is the tag's "package" property that needs to be unique, I nevertheless have a problem installing more than one instance of this app. I would like to dynamically edit the manifest package attribute's value to reflect the document and brand that I am building. But this causes build problems, specifically the location of R.java is no longer available to the component package under which the code resides. Originally, the component package is the same as the application manifest package. But precisely this manifest package name is the part that needs to be variable. How should I best proceed?

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• Confused about Huffman Trees

  - by ShrimpCrackers

  A quick tutorial on generating a huffman tree Confused about Huffman Trees. Near the end of that link above, it shows the tree with 2 elements left, and then the completed tree. I'm confused about the way that it is branched. Is there a specific way a huffman tree needs to be branched? For example, 57:* with its right child 35:* is branched off to the right. Could it have been 35 branched to the left with 22 branched to the right? Also, why wasn't 22:* paired up with 15:4 - it just paired with 20:5 to create a new tree. From initial obersvations it seems the tree does not need to be balanced or have any specific order other than that the frequencies of a leaf add up to the value of the parent node. Could two people creating a huffman tree with the same data end up with different encoding values?

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• WinForms: How do I simulate button behavior on an image?

  - by Cheeso

  I have an extension of the winforms TabControl, it's draws an X on each tab to allow the user to close the tab. How can I similate button look&feel on that image? It's not a button, it's not even an image control. It's just been drawn there. Is there a way to draw an inset border on MouseDown and Raised on MouseUp? Would I be better off generating another image, for the "inset" phase? anyone done this before? Related: Simulate Winforms Button Click Animation But this question is different because he actually has a PictureBox control. I don't.

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• How to show scrollbars in TScrollBox after it has been made visible again?

  - by aleluja

  Hi, I've ran into one small problem. I am dynamicaly generating some controls and place them on a TScrollbox component. But i noticed that if scrollbox is visible, user can clearly see each of the controls being created and placed. So it looksl ike lots of work is being done and it is slow. I hid the scrollbox and generated all the controls on it, which took much less time and no flickering and alike. But here's the problem. When i unhide the scrollbox, its' scrollbar doesn't appear untill i actually resize the form. (The alignment of scrollbox is alClient) Any ideas on how to fix this? Tried repainting, but it didn't work. Refresh didn't work either. Thank you

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• How to set probability for a targetSprite shooting accuracy in shooting game ?

  - by srikanth rongali

  Hi, My code is ion cocos2D. I have written code for generating the bullets from the enemy gun for every 0.3seconds. The enemySprite is in right side of the screen in (land scape mode) at winSize.height/2. the bullet starts from the same point and reach the player's end. I used rand() to generate y-coordinate for the bullet to hit on player side. Now, if the bullet bounded rectangle meets the player bounded rectangle the enemy won. If it misses enemy shoots again after 0.3 seconds. Every thing is fine up to here for me. But I have 10 enemies and each have accuracy of hitting player of probabilities ranging from 0.80 to 1.0. First enemy probability is .80 and 10 enemy's is 1.0. How can I adjust the probability for enemy such that it runs according to its probability. Player also hits the enemy.

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• gdata youtube api 302 'The document has moved'

  - by zalew

  I'm trying to get YouTube feeds with the python gdata library. Authentication features work ok, yt_service.ProgrammaticLogin() works, generating subauth token works, etc., but when I try to get some feeds (GetMostRecentVideoFeed, GetYouTubeVideoEntry, even GetFeed, and any other) I get: RequestError: {'status': 302, 'body': '<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">\n<TITLE>302 Moved</TITLE></HEAD><BODY>\n<H1>302 Moved</H1>\nThe document has moved\n<A HREF="http://www.google.com">here</A>.\r\n</BODY></HTML>\r\n', 'reason': 'Redirect received, but redirects_remaining <= 0'} 302 to 'google.com'??? I've even tried to do something from the google online tutorials and I get the same error. What's going on?

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• Generate Info (wrapper) Class from stored procedure

  - by Adem

  Hello everybody I am in a crucial project and I am trying to speed up the development phase by using codesmith for generating the business class DAL and info class for the tables of my project. There are about 50 tables with relationships parent child many to many and for retrieving data I have to code several inner joins in stored procedures. I have to combine fields from many tables and this makes working with the info class difficult. Is there anyway to generate info class from stored procedures or to be more exact is there a way to parse the result set of the stored procedure and to generate the info class with properties for every column in that result set. Please if anyone can give me some advice and tell me how to achieve this. Best Regards

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• Java Swing: how to add an image to a JPanel ?

  - by Leonel

  I have a JPanel to which I'd like to add JPEG and PNG images that I generate on the fly. All the examples I've seen so far in the Swing Tutorials, specially in the Swing examples use ImageIcons. I'm generating these images as byte arrays, and they are usually larger than the common icon they use in the examples, at 640x480. Is there any (performance or other) problem in using the ImageIcon class to display an image that size in a JPanel ? What's the usual way of doing it ? How to add an image to a JPanel without using the ImageIcon class ? Edit: A more careful examination of the tutorials and the API shows that you cannot add an ImageIcon directly to a JPanel. Instead, they achieve the same effect by setting the image as an icon of a JLabel. This just doesn't fill right...

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• Directory directive: AuthType None but still need an AuthProvider?

  - by Steffen Winkler

  For now I just need the server to let me download files from one specific folder (in my case I chose /opt/myFolder for that task) Distribution is Debian 6.0 *edit_start* Apache version is 2.4, according to their official documentation, the Order/Allow clauses are deprecated and should not be used anymore I'm an idiot: Apache version is 2.2. *edit_end* My directory directives in apache2.conf look like this: <IfModule dir_module> DirectoryIndex index.html index.htm index.php </IfModule> ServerRoot "/etc/apache2" DocumentRoot "/opt/myFolder" <Directory /> Options FollowSymLinks AuthType None AllowOverride None Require all denie </Directory> <Directory "/opt/myFolder/*"> Options FollowSymLinks MultiViews AllowOverride None AuthType None Require all allow </Directory> When I try to access a file inside that folder (http://myserver.de/aTestFile.zip) I get an Internal Server Error. Also Apache writes the following error into it's log: configuration error: couldn't check user. Check your authn provider!: /aTestFile.zip Why would I need an authn provider if I don't want any authentication? Also I hope someone can explain to me what kind of AuthenticationProvider I'd need for that. Everytime I search for those things I get pointed at people asking how to protect files/directories with passwords or restrict access to some IP addresses, which doesn't really help me. ok, since I've Apache version 2.2, here is the error I get when using the Order/Deny/Allow commands instead of AuthType/Require: Invalid command 'Order', perhaps misspelled or defined by a module not included in the server configuration.

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• Programming user interface advice?

  - by onurozcelik

  Hi, In my project I going to generate a user interface through programming. Scalability of this UI is very important requirement. So far I am using two dimensional graphics for generating the UI. I think there may be different solutions but for the moment I know only two. First one is supplying X,Y coordinates of each two dimensional graphic on my UI.(I do not prefer this solution because I do not want to calculate X,Y coordinates of each graphic. For the moment I don't have a logic for doing this easily) Second one(which is currently I am using now) is using layouts which organizes its contents according to size of item. In this solution I don't have to calculate X,Y coordinates of each item.(Layout is doing this for me) But this approach may have its own pitfalls. I am very new to user interface programming. Can you give me advice about this issue?

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• InstallShield 2009: Remove a dll (being used by explorer.exe for context menu) during uninstall with

  - by Samir

  Install Shield Premier 2009: Basic MSI Project I have a dll that is supposed to be removed during uninstall. But this dll is being used by explorer.exe, it is used for generating windows explorer context menus with their icons(same as the menu items, icons we see when we right click on any file/folder and see the WinRAR items, icons). Manually, I have to unregister the dll and close explorer.exe from task manager and again run explorer.exe. Then I can delete the dll. So from Install Shield how to delete this dll without any problem(as we see while uninstalling WinRAR or other software there is no problem no message boxes shown and the related context menu icons also removed).

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• HyperJAXB and IDREFs

  - by finrod

  I have eventually managed to fiddle HyperJAXB so that when XSD has complexType A and this has an IDREF to complexType B, then HyperJAXB will generate @OneToOne JPA annotations between the the two generated entities. However now I'm facing another problem: the XSD has complex type X that can IDREF to either complex type Y or complex type Z. In the end, I need instance of complex type X contain reference to either instance of class Y or class Z. Do you have any wild ideas how can this be done without manual alterations to the generated classes? And at the same time to make sure these entities are marshalled to a correct XML? How about using the JAXB plugin that allows generating classes so that they implement a particular interface? Could that lead anywhere?

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• Statistics: combinations in Python

  - by Morlock

  I need to compute combinatorials (nCr) in Python but cannot find the function to do that in 'math', 'numyp' or 'stat' libraries. Something like a function of the type: comb = calculate_combinations(n, r) I need the number of possible combinations, not the actual combinations, so itertools.combinations does not interest me. Finally, I want to avoid using factorials, as the numbers I'll be calculating the combinations for can get to big and the factorials are going to be monstruous. This seems like a REALLY easy to answer question, however I am being drowned in questions about generating all the actual combinations, which is not what I want. :) Many thanks

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• Creating a MSI patch (.msp) by hand?

  - by Jerry Chong

  Our team has recently been considering pushing out a minor registry fix to users to modify one particular problematic key. Pretty straightforward stuff, just needed to update 1 key/value inside the registry. So at the moment, we are using Wix to build .msi installers for the product. While looking into Wix's support for generating .msp patch files, it seems that the only way to create an .msp is a somewhat overcomplicated multi-step process to: Get a copy of the original MSI, and compile a new copy of the fixed MSI Write a new Wix file that points to both installers Compile the Wix file into a .wixobj with Candle to a .psp Run Torch/Pyro over before/after snapshots of the original installers and the .psp, or alternatively using MsiMsp.exe Now my question is, can't I simply describe the registry change into a Wix file and directly compile it into the .msp, without step 1 and 4 - which is a huge amount of effort for just a simple change?

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• LDAP: Extend database using referral

  - by ecapstone

  My company uses an off-site LDAP server to handle authentication. I'm currently working on a local VPN for my branch that needs to use the off-site LDAP to check user's usernames and passwords, but I don't want every employee to have access to the VPN - I need to be able to control whether users can authenticate with the off-site LDAP based on whether they're allowed to use the VPN. My current solution involves having our own local LDAP server, which has a referral to the off-site server (I got most of my information from here: http://www.zytrax.com/books/ldap/ch7/referrals.html). This means that when local users try to check their credentials with the local server, it redirects them to the off-site server, which checks the credentials. This works for authentication, but not for authorization. It would be easiest to add a vpn_users group or is_vpn_user attribute on the off-site server, but, well, that's above my pay grade. Is there any way I can use the local server to control whether users have access to the VPN without needing to change the off-site server? If I could somehow use it to have a local vpn_users group without the users in it having to be located on the local server, that would probably work, but I have no idea how to set that up or if LDAP even supports such a configuration. For reference, I'm using the openvpn-auth-ldap (https://code.google.com/p/openvpn-auth-ldap/) plugin.

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• Reflection.Emit: How to convert MethodBuilder to RuntimeMethodInfo reliably?

  - by Qwertie

  After generating a type dynamically and calling TypeBuilder.CreateType, I want to create a delegate that points to a method in the new type. But if I use code like loadedType = typeBuilder.CreateType(); myDelegate = (MyDelegate)Delegate.CreateDelegate( typeof(MyDelegate), methodBuilder); Reusing the methodBuilder as a methodInfo, I get the exception "MethodInfo must be a RuntimeMethodInfo". Now normally I can re-acquire the MethodInfo with MethodInfo mi = loadedType.GetMethod(methodBuilder.Name); myDelegate = (MyDelegate)Delegate.CreateDelegate(typeof(MyDelegate), mi); But my class may contain several overloaded methods with the same name. How do I make sure I get the right one? Do methods have some persistent identifier I could look up in loadedType?

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• Edit Distance in Python

  - by Alice

  I'm programming a spellcheck program in Python. I have a list of valid words (the dictionary) and I need to output a list of words from this dictionary that have an edit distance of 2 from a given invalid word. I know I need to start by generating a list with an edit distance of one from the invalid word(and then run that again on all the generated words). I have three methods, inserts(...), deletions(...) and changes(...) that should output a list of words with an edit distance of 1, where inserts outputs all valid words with one more letter than the given word, deletions outputs all valid words with one less letter, and changes outputs all valid words with one different letter. I've checked a bunch of places but I can't seem to find an algorithm that describes this process. All the ideas I've come up with involve looping through the dictionary list multiple times, which would be extremely time consuming. If anyone could offer some insight, I'd be extremely grateful. Thanks!

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• smbclient timing out

  - by Sam Lee

  I am trying to set up a Samba share on a Centos machine. I want to connect to this server using smbclient on OS X. Here is what happens: > smbclient -L X.X.X.X timeout connecting to X.X.X.X:445 timeout connecting to X.X.X.X:139 Error connecting to X.X.X.X (Operation already in progress) Connection to X.X.X.X failed What could be going wrong? Here is my iptables dump on the Centos machine (the server): > iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 REJECT all -- 0.0.0.0/0 127.0.0.0/8 reject-with icmp-port-unreachable ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:445 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3000 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:443 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 8 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3000 And finally, my smb.conf: [global] workgroup = workgroup security = SHARE load printers = No default service = global path = /home available = No encrypt passwords = yes [share] writeable = yes admin users = myusername path = /home/myhome/ force user = root valid users = myusername public = yes available = yes

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• How to protect web site against hackers?

  - by Adi barda

  Hi Guys, Like everyone of us, I have my own dreams about developing the next cool product that will be adopted by many users and become industry standard. Surprisingly, I find that the most challenging task is to keep my website up & running. My site is being hacked again and again no matter what I do - I blocked the FTP connections, changed the Joomla (CMS) database table names, installed all latest patches and what not. The web site supports the product (over 1800 users now...) by generating licenses, support forums, documentation, galleries etc. The product which is a winforms application cannot be marketed without this web site. My question: Do you have any innovative idea about securing joomla based web sites or what is the best secured web hosting you know. currently i'm hosting my site at ixwebhosting and i like them very much but obviously i can't do any serious marketing being hacked over and over again Thank you very much, Adi Barda

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• With no password expire notification at logon in Windows 7, how are you configuring password expire

  - by J. L.

  To my understanding, Windows 7 users do not receive password expiration notification during the logon process - it occurs strictly from the system tray. We currently have tray balloon notifications disabled to lessen user distraction, and I expect the password change process is a smoother one during the logon process rather than in an existing session. As a result, users will get prompted to change their passwords at expiration. The users also connect to Terminal Services boxes, but receive the advanced notification for password expiration there. So, Windows 7 is not notifying, but TS/RDS and XP boxes are. Any guidance on configuring this? Personally, I would turn off all expiration notices, but I understand most users would prefer to see the notification. Thoughts? Any GPO or other settings I might be overlooking? The interactive logon setting below is already enabled for our Win7 workstation GPO. My thought is balloon notifications will get turned back on for Windows 7, but I wanted to see if anyone was aware of alternatives. Thanks. Computer Configuration\Windows Settings\Security Settings\Local Policies - Security Options Interactive logon: Prompt user to change password before expiration

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• Generate dynamic html

  - by Fred

  Hi all, to export some data i want to be able to generate an html output. I have some constant content to output, like html headers and footers. My question is how to deal with that ? Do I have to embed some template (in a ressource file) and parse it to make it dynamic ? Do I store my static content in some constant (is there a 255 char limit?) and append them while generating the dynamic content ? Do you have some hints, useful links, or best practices to share? Thanks

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• Key stroke time in Openmoko or any smart phones

  - by Adi

  Dear all, I am doing a project in which I am working on security issues related to smart phones. I want to develop an authentication scheme which is based on biometrics, Every human being have a unique key-hold time,digraph time error rate. Key-Hold Time : Time difference between pressing and releasing a key . Digraph Time : Time difference between releasing one and pressing next one. Error Rate : No of times backspace is pressed. I got these metrics from a paper "Keystroke-based User Identification on Smart Phones" by Saira Zahid1, Muhammad Shahzad1, Syed Ali Khayam1,2, Muddassar Farooq1. I was planning to get the datasets to test my algorithm from openmoko phone, but the phone is mis-behaving and I am finding trouble in generating these time data-sets. If anyone can help me or tell me a good source of data sets for the 3 metrics I defined, it will be a great help. Thanks Aditya

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• java serialization and final fields

  - by mdma

  I have an class defining an immutable value type that I now need to serialize. The immutability comes from the final fields which are set in the constructor. I've tried serializing, and it works (surprisingly?) - but I've no idea how. Here's an example of the class public class MyValueType implements Serializable { private final int value; private transient int derivedValue; public MyValueType(int value) { this.value = value; this.derivedValue = derivedValue(value); } // getters etc... } Given that the class doesn't have a no arg constructor, how can it be instantiated and the final field set? (An aside - I noticed this class particularly because IDEA wasn't generating a "no serialVersionUID" inspection warning for this class, yet successfully generated warnings for other classes that I've just made serializable.)

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