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• java keytool question

  - by user384706

  Hi, I created a java keystore programmatically of type jks (i.e. default type). It is initially empty so I created a DSA certificate. keytool -genkey -alias myCert -v -keystore trivial.keystore How can I see the public and private keys? I.e. is there a command that prints the private key of my certificate? I could only find keytool -certreq which in my understanding prints the certificate as a whole: -----BEGIN NEW CERTIFICATE REQUEST----- MIICaTCCAicCAQAwZTELMAkGA1UEBhMCR1IxDzANBgNVBAgTBkdyZWVjZTEPMA0GA1UEBxMGQXRo BQADLwAwLAIUQZbY/3Qq0G26fsBbWiHMbuVd3VICFE+gwtUauYiRbHh0caAtRj3qRTwl -----END NEW CERTIFICATE REQUEST----- I assume this is the whole certificate. How can I see private (or public key) via keytool? Thank you

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• Key/Value pyqt QComboBox

  - by Danilo

  I want to use a QComboBox with the "keys" and "values" from a tuple similar to the ones used in a django models. For example I have the following structure for a person's sex. SEX_CHOICES = (('M', 'Male'), ('F', 'Female')) The first item of the tuple contains the code of the sex that is stored in the database, and the second one the text that I want to display in the QComboBox as an item. Is there a way in wich I could set the QComboBox value as M and it displays Male. An also when the user select the element Male I could get the selected value as M. Thanks

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• Can you restrict entering invalid keystrokes with jquery ui autocomplete combobox

  - by oo

  when using the jquery ui autocomplete combobox, i would thought there would be an option to force only valid key entry based on the list. Is there anyway to not allow invalid keys so you can only enter valid items in the list? also, is there a way to set a default value of the combobox. if my list has (csharp, java, python) i can start typing "abcds . ." and it lets me type it in. I want only valid entries to be allowed.

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• VS2010 express beta2 - no add reference dialog, no open file/project dialogs

  - by David

  Just installed VS2010 express for Windows Phone last night. Install went smoothly. It creates a project, compiles, and deploys the app to the emulator. Here's the problem: When I try to "Add Reference" through the Project menu, I do not get the Add Reference dialog box. Same thing if I right click References in the solution explorer and click Add Reference. That's not all. "File...Open" and "File...Open Project" also fail to throw up an open file dialog box. When attempting any of these actions, the IDE quickly loses and regains focus. Even pressing a keyboard shortcut (Ctrl+O) causes the IDE to quickly lose and regain focus, but no open file dialog box appears. This is what I have tried, not particularly in this order: 1. Turned off UAC 2. Monitored file and registry access using Process Monitor during a File...Open operation. File activity showed mostly "SUCCESS" with a few "FAST IO DISALLOWED" and a few "INVALID DEVICE REQUEST" results. Registry activity showed mostly "SUCCESS" with some "NAME NOT FOUND" and a few "BUFFER OVERFLOW" results. 3. Created a new, clean Windows account to run the IDE from 4. Forced a test project to add a reference to "System.Xml.Linq" by editing the ".csproj" project file. Project failed to load in the IDE. I don't have these problems at all on 2 other Windows 7 computers with VS2010 C# express beta 2 installed. One machine is 32bit and the other 64bit, both Home Premium edition. My system: Windows 7 Home Premium, 64bit Other Visual Studio products installed: VS2008 C# express, VS2008 C++ express One other thing to note: Several months ago I installed the non-phone distribution of VS2010 C# express beta 2, and I had the same exact problems. Back then I chalked it up to being beta and went back to VS2008 C# express, where I do not have these issues.

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• How do I specify the block object / predicate required by NSDictionary's keysOfEntriesPassingTest ?

  - by Todd

  For learning (not practical -- yet) purposes, I'd like to use the following method on an NSDictionary to give me back a set of keys that have values using a test I've defined. Unfortunately have no idea how to specify the predicate. NSDictionary keysOfEntriesPassingTest: - (NSSet *)keysOfEntriesPassingTest:(BOOL (^)(id key, id obj, BOOL *stop))predicate Let's say for example all my values are NSURLs, and I'd like to get back all the URLs that are on port 8080. Here's my stab at coding that -- though it doesn't really make sense to me that it'd be correct: NSSet * mySet = [myDict keysOfEntriesPassingTest:^(id key, id obj, BOOL *stop) { if( [[obj port] isEqual: [NSNumber numberWithInt: 8080]]) { return key; }] And that's because I get back the following compiler error: incompatible block pointer types initializing 'void (^)(struct objc_object *, struct objc_object *, BOOL *)', expected 'BOOL (^)(struct objc_object *, struct objc_object *, BOOL *)' What am I missing? I'd appreciate a pointer at some docs that go into more detail about the "Block object" that the predicate is supposed to be. Thanks!

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• Database designing for a bug tracking system in SQL

  - by Yasser

  I am an ASP.NET developer and I really dont do such of database stuff. But for my open source project on Codeplex I am required to setup a database schema for the project. So reading from here and there I have managed to do the following. As being new to database schema designing, I wanted some one else who has a better idea on this topic to help me identify any issues with this design. Most of the relationships are self explanatory I think, but still I will jot each one down. The two keys between UserProfile and Issues are for relationships between UserId and IssueCreatedBy and IssueClosedBy Thanks

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• Drupal theme preprocess function - primary links

  - by slimcady

  I recently wrote a theme function to add a class to my primary links that works great. I then wrote some css classes to style these links with custom background images. Worked out great. Now comes the problem, the link text for the primary links still is displayed. Normally this isn't a problem as I would just wrap the in a with a custom "hide" class. For example: <span class="hide"><a href="#">Link Text</a></span> So my question is how can I loop through the primary links and wrap the text w/ a <span> like my example? Here's my theme function that I used to add my classes. function zkc_preprocess_page(&$vars, $hook) { // Make a shortcut for the primary links variables $primary_links = $vars['primary_links']; // Loop thru the menu, adding a new class for CSS selectors $i = 1; foreach ($primary_links as $link => $attributes){ // Append the new class to existing classes for each menu item $class = $attributes['attributes']['class'] . " item-$i"; // Add revised classes back to the primary links temp variable $primary_links[$link]['$attributes']['class'] = $class; $i++; } // end the foreach loop // reset the variable to contain the new markup $vars['primary_links'] = $primary_links; }

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• Alright to truncate database tables when also using Hibernate?

  - by Marcus

  Is it OK to truncate tables while at the same time using Hibernate to insert data? We parse a big XML file with many relationships into Hibernate POJO's and persist to the DB. We are now planning on purging existing data at certain points in time by truncating the tables. Is this OK? It seems to work fine. We don't use Hibernate's second level cache. One thing I did notice, which is fine, is that when inserting we generate primary keys using Hibernate's @GeneratedValue where Hibernate just uses a key value one greater than the highest value in the table - and even though we are truncating the tables, Hibernate remembers the prior value and uses prior value + 1 as opposed to starting over at 1. This is fine, just unexpected. Note that the reason we do truncate as opposed to calling delete() on the Hibernate POJO's is for speed. We have gazillions of rows of data, and truncate is just so much faster.

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• GLib Hash Table - Pointer

  - by Mike

  I'm trying to increment the value of some specific key if it was found. For some reason I keep getting the (pointer) address when I dump all keys:values from the hash table. Output a: 153654132 // should be 5 b: 1 c: 153654276 // should be 3 d: 1 e: 1 f: 153654420 // should be 3 int proc() { struct st stu; gpointer ok, ov; //... some non-related code here if(!g_hash_table_lookup_extended(ht, key, &ok, &ov)){ stu.my_int = g_malloc(sizeof(guint)); *(stu.my_int) = 0; g_hash_table_insert(table, g_strdup(key), GINT_TO_POINTER(1)); }else{ stu.my_int = g_malloc(sizeof(guint)); *(stu.my_int)++; g_hash_table_insert(table, g_strdup(key), stu.my_int); } } Any ideas will be appreciate it.

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• GLib Hash Table - Pointer

  - by Mike

  I'm trying to increment the value of some specific key if it was found. For some reason I keep getting the (pointer) address when I dump all keys:values from the hash table. Output a: 153654132 // should be 5 b: 1 c: 153654276 // should be 3 d: 1 e: 1 f: 153654420 // should be 3 int proc() { struct st stu; gpointer ok, ov; //... some non-related code here if(!g_hash_table_lookup_extended(table, key, &ok, &ov)){ stu.my_int = g_malloc(sizeof(guint)); *(stu.my_int) = 0; g_hash_table_insert(table, g_strdup(key), GINT_TO_POINTER(1)); }else{ stu.my_int = g_malloc(sizeof(guint)); *(stu.my_int)++; g_hash_table_insert(table, g_strdup(key), stu.my_int); } } Any ideas will be appreciate it.

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• PHP 2D Array to MySQL Database

  - by Ashley Ward

  I have a PHP 2D array, many keys, each with one value, I need to put this into a MySQL database. The database has 8 fields. Eg. Field1, Field2, Field3, etc. I am trying to ensure value1 => field1, value2 =>field2, value3 => field3 and so on, when one record is full (i.e. after 8 values) a new record should be created for the next 8 values and so on. I am aware that the 1st, 9th, 17th, 26th values etc, will need an insert statement and the intermediate values will be an update statement. What is the best way of going about this?

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• TreeMap randomly stops properly returning values

  - by smessing

  I have the following TreeMap: TreeMap<String, Integer> distances = new TreeMap<String, Integer>(); and it contains both strings, "Face" and "Foo", with appropriate values, such that: System.out.println(distances); Yields: {Face=12, Foo=2} However, distances.get(Face) returns null, even though distances.get(Foo) properly returns 2. Previously, distances.get(Face) worked, but for some reason, it stopped working. Note I print out the map right before calling get() for both keys, so I haven't accidentally changed Face's value to null. Has anyone else ever encountered this problem? Is there anything I can do? I'm having a terrible time simply trying to figure out how to debug this problem.

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• Choice of primary index for mysql innoDB

  - by Saif Bechan

  I have an auction website where users can place a bid on a product. Now i have a primary index on the bid table for easy access of the last places bid on the product. This index is just a unique auto incrementing value. During the week this number becomes huge!! I was wondering if this is a good setup for the primary key in an innoDB table. The bids table exist of the following important fields: table: bids fields: user_id,product_id,bid So what i want to do is make the primary of these 3 fields combined. Is this a good idea or is this just too much for innoDB keys.

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• Getting config element from ConfigurationElementCollection

  - by Martin

  I have (hopefully) setup ConfigurationElementCollection of my own design with emails as keys. Now what? Hard to find actually on the web. How do I: iterate through it? See if a specific element exists? get a specific element? ...given: YourConfigElement config = ConfigurationManager.GetSection("YourSectionName") as YourConfigElement ; Partial answer Does this work? no, sadly. foreach (X x in config.XCollection.AsQueryable()) ...

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• Java: versioned data structures?

  - by Jason S

  I have a data structure that is pretty simple (basically a structure containing some arrays and single values), but I need to record the history of the data structure so that I can efficiently get the contents of the data structure at any point in time. Is there a relatively straightforward way to do this? The best way I can think of would be to encapsulate the whole data structure with something that handles all the mutating operations by storing data in functional data structures, and then for each mutation operation caching a copy of the data structure in a Map indexed by time-ordering (e.g. a TreeMap with real time as keys, or a HashMap with a counter of mutation operations combined with one or more indexes stored in TreeMaps mapping real time / tick count / etc. to mutation operations) any suggestions?

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• How do you share your git repository with other developers?

  - by semi

  I have a central git repository that everyone pushes to for testing and integration, but it only is pushed to when features are 'ready'. While in the middle of a big task, developers frequently have many commits that stay on their harddrives. Sometimes in the middle of these projects I'd like to either see what another developer is doing, or show him how I've done something. I'd like to be able to tell another developer to just "pull my working copy" The only way I can think of is having everyone run ssh on their development machines and adding accounts or ssh keys for everyone, but this is a huge privacy and permissions nightmare, and seems like a lot of work to maintain. Should we just be pushing to that central repository in these cases? Should we be pushing after every local commit?

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• Use of Java constructors in persistent entities

  - by Mr Morgan

  Hello I'm new to JPA and using persistence in Java anyway and I have two questions I can't quite work out: I have generated tags as: @JoinColumn(name = "UserName", referencedColumnName = "UserName") @ManyToOne(optional = false) private User userName; @JoinColumn(name = "DatasetNo", referencedColumnName = "DatasetNo") @ManyToOne(optional = false) private Dataset datasetNo; But in one of the constructors for the class, no reference is made to columns UserName or DatasetNo whereas all other columns in the class are referenced in the constructor. Can anyone tell me why this is? Both columns UserName and DatasetNo are 'foreign keys' on the entity Visualisation which corresponds to a database table of the same name. I can't quite work out the ORM. And when using entity classes, or POJO, is it better to have class variables like: private User userName; Where an instance of a class is specified or simply the key of that class instance like: private String userName; Thanks Mr Morgan.

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• How to make an invisible button to run a command

  - by Denis Mitropolskiy

  I have a form with TextBox and two Buttons. One button has IsDefault property set to true, and IsCancel set to true for other button. TextBox is CommandTarget for both buttons. When I'm pressing Enter or ESC keys on TextBox, it works as I'm pressing on corresponding button. I want to remove buttons from the form. They should not be visible, but the textbox should react on Enter or ESC as before. I cannot just set button's Visible property to collapsed - in this case they does not work at all. And I prefer to avoid of tracking keyboard events. Is it possible?

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• One repository per table or one per functional section?

  - by Ian Roke

  I am using ASP.NET MVC 2 and C# with Entity Framework 4.0 to code against a normalised SQL Server database. A part of my database structure contains a table of entries with foreign keys relating to sub-tables containing drivers, cars, engines, chassis etc. I am following the Nerd Dinner tutorial which sets up a repository for dinners which is fair enough. Do I do one for drivers, one for engines, one for cars and so on or do I do one big one for entries? Which is the best practise for this type of work? I am still new to this method of coding.

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• Multiple key/value pairs in HTTP POST where key is the same name

  - by randombits

  I'm working on an API that accepts data from remote clients, some of which where the key in an HTTP POST almost functions as an array. In english what this means is say I have a resource on my server called "class". A class in this sense, is the type a student sits in and a teacher educates in. When the user submits an HTTP POST to create a new class for their application, a lot of the key value pairs look like: student_name: Bob Smith student_name: Jane Smith student_name: Chris Smith What's the best way to handle this on both the client side (let's say the client is cURL or ActiveResource, whatever..) and what's a decent way of handling this on the server-side if my server is a Ruby on Rails app? Need a way to allow for multiple keys with the same name and without any namespace clashing or loss of data.

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• Keyboard input for a game in Java

  - by hmp

  I'm writing a game in Java, right now it's Swing + JOGL - a JFrame with a GLCanvas. I handle input using keyPressed etc. events (jframe.addKeyListener(...)) and it doesn't seem to work properly: when I have 3+ keys down at the same time, they don't register properly after the window loses, then regains focus, input stops working completely... What am I doing wrong? Is there a better way of handling keyboard input in Java? (I'd rather not switch to another library, like LWJGL... unless I have no choice).

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• how to write mute logic when mute state is unknown

  - by Delan Azabani

  I'm writing an indicator-sound clone for OSS4. Setting the volume works fine now, but I'm having trouble with the muting aspect of my program. A couple of facts about muting in OSS4: vmix doesn't have a mute (and we use vmix for volume control) also, the 'media keys' way of controlling volume doesn't set a mute control, but rather, volume = 0 The problem with this is, when reading the vmix volume and encountering zero, we don't know if the user has actually set it to zero, or has it set to some other value, but has mute on. How should I write my muting logic? git code, if that helps

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• [PHP] access array element by value

  - by Brandon

  array( [0] name => 'joe' size => 'large' [1] name => 'bill' size => 'small' ) I think i'm being thick, but to get the attributes of an array element if I know the value of one of the keys, I'm first looping through the elements to find the right one. foreach($array as $item){ if ($item['name'] == 'joe'){ #operations on $item } } I'm aware that this is probably very poor, but I am fairly new and am looking for a way to access this element directly by value. Or do I need the key? Thanks, Brandon

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• perl array of hashes sorting

  - by srk

  use strict; my @arr; $arr[0][0]{5} = 16; $arr[0][1]{6} = 11; $arr[0][2]{7} = 25; $arr[0][3]{8} = 31; $arr[0][4]{9} = 16; $arr[0][5]{10} = 17; sort the array based on hash values so this should change to $arr[0][0]{6} = 11; $arr[0][1]{9} = 16; $arr[0][2]{5} = 16; $arr[0][3]{10} = 17; $arr[0][4]{7} = 25; $arr[0][5]{8} = 31; first sort on values in the hash.. when the values are same reverse sort based on keys... Please tell me how to do this.. Thank you

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• How to parse app.config using ConfigurationManager?

  - by Amokrane

  I was using a certain method for parsing my app.config file. Then I was told that using ConfigurationManager is better and simpler. But the thing is I don't know how to do it with ConfigurationManager. My original code looked like this: XmlNode xmlProvidersNode; XmlNodeList xmlProvidersList; XmlNodeList xmlTaskFactoriesList; XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load("app.config"); xmlProvidersNode = xmlDoc.DocumentElement.SelectSingleNode("TaskProviders"); xmlProvidersList = xmlProvidersNode.SelectNodes("TaskProvider"); foreach (XmlNode xmlProviderElement in xmlProvidersList) { if (xmlProviderElement.Attributes.GetNamedItem("Name").Value.Equals(_taskProvider)) { xmlTaskFactoriesList = xmlProviderElement.SelectNodes("TaskTypeFactory"); foreach (XmlNode xmlTaskFactoryElement in xmlTaskFactoriesList) { if (xmlTaskFactoryElement.Attributes.GetNamedItem("TaskType").Value.Equals(_taskType)) { taskTypeFactory = xmlTaskFactoryElement.Attributes.GetNamedItem("Class").Value; } } } } What would be the equivalent using ConfigurationManager? (Because all I can see is how to get keys not nodes..) Thanks

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