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  • Random number Generator in C#

    - by Sunil
    Why do i need to create an instance of Random class, if i want to create a random number between 1 and 100 ....like Random rand = new Random(); rand.Next(1,100); Is there any static function of Random class to do the same? like... Random.Next(1,100); I don't want to create an instance unnecessarily

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  • Filter chain halted as [:login_required] rendered_or_redirected

    - by Magicked
    Hopefully I can explain this well enough, but please let me know if more information is needed! I'm building a form where a user can create an "incident". This incident has the following relationships: belongs_to: customer (customer has_many incidents) belongs_to: user (user has_many incidents) has_one: incident_status (incident_status belongs to incident) The form allows the user to assign the incident to a user (select form) and then select an incident status. The incident is nested in customer. However, I'm getting the following in the server logs: Processing IncidentsController#create (for 127.0.0.1 at 2010-04-26 10:41:33) [POST] Parameters: {"commit"=>"Create", "action"=>"create", "authenticity_token"=>"YhW++vd/dnLoNV/DSl1DULcaWq/RwP7jvLOVx9jQblA=", "customer_id"=>"4", "controller"=>"incidents", "incident"=>{"title"=>"Some Bad Incident", "incident_status_id"=>"1", "user_id"=>"2", "other_name"=>"SS01-042310-001"}} User Load (0.3ms) SELECT * FROM "users" WHERE ("users"."id" = 2) LIMIT 1 Redirected to http://localhost:3000/session/new Filter chain halted as [:login_required] rendered_or_redirected. Completed in 55ms (DB: 0) | 302 Found [http://localhost/customers/4/incidents] It looks to me like it's trying to gather information about the user, even though it already has the id (which is all it needs to create the incident), and the user may not have permission to do a select statement like that? I'm rather confused. Here is the relevant (I think) information in the Incident controller. before_filter :login_required, :get_customer def new @incident = @customer.incidents.build @users = @customer.users @statuses = IncidentStatus.find(:all) respond_to do |format| format.html # new.html.erb format.xml { render :xml => @incident } end end def create @incident = @customer.incidents.build(params[:incident]) respond_to do |format| if @incident.save flash[:notice] = 'Incident was successfully created.' format.html { redirect_to(@incident) } format.xml { render :xml => @incident, :status => :created, :location => @incident } else format.html { render :action => "new" } format.xml { render :xml => @incident.errors, :status => :unprocessable_entity } end end end Just as an FYI, I am using the restful_authentication plugin. So in summary, when I submit the incident creation form, it does not save the incident because it halts. I'm still very new to rails, so my skill at diagnosing problems like this is still very bad. I'm going in circles. :) Thanks in advance for any help. Please let me know if more information is needed and I'll edit it in!

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  • Firebird sequence-backed ID shorthand

    - by pilcrow
    What do others do to simplify the creation of simple, serial surrogate keys populated by a SEQUENCE (a.k.a. GENERATOR) in Firebird = 2.1? I finc the process comparatively arduous: For example, in PostgreSQL, I simply type: pg> CREATE TABLE tbl ( > id SERIAL NOT NULL PRIMARY KEY, > ... In MySQL, I simply type: my> CREATE TABLE tbl ( > id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, > ... But in Firebird I type: fb> CREATE TABLE tbl ( > id BIGINT NOT NULL PRIMARY KEY, > ... fb> CREATE SEQUENCE tbl_id_seq; fb> SET TERM !!; > CREATE TRIGGER tbl_id_trg FOR tbl > ACTIVE BEFORE INSERT POSITION 0 > AS > BEGIN > IF ((new.id IS NULL) OR (new.id <= 0)) THEN > BEGIN > new.id = GEN_ID(tbl_id_seq, 1); > END > END !! > SET TERM ; !! ... and I get pretty bored by the time I reach trigger definition. However, I routinely make SEQUENCE-backed ID fields for temporary, developement and throw-away tables. What do others do to simplify this? Work with an IDE? Run a pre-processing, in-house perl script over the DDL file? Etc.

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  • How do I manage library symbols with linked classes in Flash CS4 to compile/debug in Flash Builder 4

    - by wpjmurray
    I'm building a video player using Flash CS4 (hereby referred to as "Flash") to create the graphic symbols and compiling and debugging with Flash Builder 4 ("FB4"). Here are the steps I take in my current workflow: --Create the graphic symbols in Flash. I've created a few different symbols for the player, but I'll focus on just the play/pause button ("ppbutton") here. --In the Library panel, I go to the ppbutton symbol's Linkage properties and link to a class named assets.PlayPauseButtonAsset that extends MovieClip. I do not actually have an assets package nor do I have a class file for PlayPauseButtonAsset as Flash will create them for me when I publish. --In Flash's Publish settings, I set the project to export a SWC that will be used in FB4, called VideoPlayerAssets.swc. --After the SWC is created, I create my FB4 project called "VideoPlayer" and add the SWC to my path. FB4 creates the class VideoPlayer in the default package automatically. --In VideoPlayer.as, I import assets.*, which imports all of the symbol classes I created in Flash and are available via VideoPlayerAssets.swc. I can now instantiate the ppbutton and add to the stage, like this: var ppbutton:PlayPauseButtonAsset = new PlayPauseButtonAsset(); addChild(ppbutton); At this point ppbutton doesn't have any functionality because I didn't create any code for it. So I create a new class called video.controls.PlayPauseButtonLogic which extends assets.PlayPauseButtonAsset. I add some logic, and now I can use that new class to put a working ppbutton on the stage: var ppbutton:PlayPauseButtonLogic = new PlayPauseButtonLogic(); addChild(ppbutton); This works fine, but you may be asking why I didn't just link the ppbutton symbol in Flash to the video.controls.PlayPauseButtonLogic class in the first place. The reason is that I have a designer creating the UI in Flash and I don't want to have to re-publish the SWC from Flash every time I make a change in the logic. Basically, I want my designer to be able to make a symbol in Flash, link that symbol to a logically named class in Linkage properties, and export the SWC. I do not want to have to touch that .fla file again unless the designer makes changes to the symbols or layout. I'm using a versioning system for the project as well and it's cleaner to make sure only the designer is touching the .fla file. So, finally, here's the issue I'm running into: --As the design gets more complex, the designer is nesting symbols to position the video controls on the control bar. He creates a controlbar symbol and links it to assets.ControlBarAsset. The controlbar symbol contains the ppbutton symbol. --The designer publishes the SWC and ControlBarAsset is now available in FB4. I create new class called video.controls.ControlBarLogic that extends assets.ControlBarAsset so I can add some logic to the controlbar, and I add the controlbar to the stage: var controlbar:ControlBarLogic = new ControlBarLogic(); addChild(controlbar); --This works, but the ppbutton doesn't do anything. That's because ppbutton, while inside controlbar, is still only linked to PlayPauseButtonAsset, which doesn't have any logic. I'm no longer instantiating a ppbutton object because it's part of controlbar. That's where I'm stuck today. I can't seem to simply re-cast controlbar's ppbutton as PlayPauseButtonLogic as I get a Type error. And I don't want to have to make a class that has to instantiate each of the video player controls, the place them at their x and y values on the stage according to how the designer placed them, as that would require me to open the .fla and check the various properties of a symbol, then add those values to the code. If the designer made a change, I'd have to go into the code each time just to update those properties each time. Not good. How do I re-cast nested symbols to use the logic classes that I create that extend the asset classes? Remember, the solution is not to link Flash symbols to actual classes so I don't have to keep recompiling the SWC, unless there's a way to do that without having to re-compile the SWC. I want the designer to do his thing, publish the SWC, and be done with it. Then I can take his SWC, apply my logic to his assets, and be able to debug and compile the final SWF.

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  • COM IUnknown and do I need a pointer to it first before calling CoGetClassObject?

    - by Tony
    In COM, when you want to create an instance of some COM Server object, do you first need to get a pointer to it's IUnknown interface and only then create a class object using CoGetClassObject? As far as I understand it, IUnknown is used to manage object lifetimes, so from my understanding, whatever object the client wants to create, one needs a pointer to it's IUnknown interface implementation first. Sound correct? If not, can anyone tell me how it works?

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  • sql database connection on remote server

    - by arti pathak
    i create my web site on asp.net and i create database in sql using inbuilt it in visual studio i use step to create database 1.right click on solution explorer then add newSqldatabase then ok then if i connect it by coding then it will work on my local PC but actuall i am making website so i want to store it on my web server then if i load databse file (.mdf) file in my web server where my all files are loaded then it is showing it error "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" so please help me and send me all step how i create database and what coding i use to connect on remote server....... Thank You......

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  • Spring scheduler shutdown error

    - by Alex
    During development a SPRING based scheduler in a tomcat container, I always get this logoutput at undeploy webapp or shutdown server: Apr 28, 2010 4:21:33 PM org.apache.catalina.core.StandardService stop INFO: Stopping service Catalina Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-1] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-2] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-3] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-4] but has failed to stop it. This is very likely to create a memory leak. Apr 28, 2010 4:21:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: A web application appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-5] but has failed to stop it. This is very likely to create a memory leak. . . . SEVERE: A web application created a ThreadLocal with key of type [org.springframework.core.NamedThreadLocal] (value [Prototype beans currently in creation]) and a value of type [null] (value [null]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed. Apr 28, 2010 4:21:34 PM org.apache.coyote.http11.Http11Protocol destroy INFO: Stopping Coyote HTTP/1.1 on http-8606 How can I fix this?

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  • Updating multiple related tables in SQLite

    - by PerryJ
    Just some background, sorry so long winded. I'm using the System.Data.SQLite ADO.net adapter to create a local sqlite database and this will be the only process hitting the database, so I don't need to worry about concurrency. I'm building the database from various sources and don't want to build this all in memory using datasets or dataadapters or anything like that. I want to do this using SQL (DdCommands). I'm not very good with SQL and complete noob in sqlite. I'm basically using sqlite as a local database / save file structure. The database has a lot of related tables and the data has nothing to do with People or Regions or Districts, but to use a simple analogy, imagine: Region table with auto increment RegionID, RegionName column and various optional columns. District table with auto increment DistrictID, DistrictName, RegionId, and various optional columns Person table with auto increment PersonID, PersonName, DistrictID, and various optional columns So I get some data representing RegionName, DistrictName,PersonName, and other Person related data. The Region, District and/or Person may or may not be created at this point. Once again, not being the greatest with this, my thoughts would be something like: Check to see if Region exists and if so get the RegionID else create it and get RegionID Check to see if District exists and if so get the DistrictID else create it adding in RegionID from above and get DistrictID Check to see if Person exists and if so get the PersonID else create it adding in DistrictID from above and get PersonID Update Person with rest of data. In MS SQL Server I would create a stored procedure to handle all this. Only way I can see to do this with sqlite is a lot of commands. So I'm sure I'm not getting this. I've spent hours looking around on various sites but just don't feel like I'm going down the right road. Any suggestions would be greatly appreciated.

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  • UIView or UIViewController for custom View

    - by Daniel A. White
    What is the best way to create a custom UIView that I can consume in Interface Builder? Create a custom UIView in Interface Builder and inherit from UIView in a code file, then somehow use it in another UIView ala like a control. (How do I do this?) Create a custom UIView in Interface Builder and have a custom UIViewController wire it up. In my main ViewController, place the new view. Basically, I am trying to create a reusable display view and would like a quick way to change it across all my instances with minimal effort.

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  • Solaris 32bit / 64bit confusion

    - by goldenmean
    I have a Solaris on a AMD- uname -a gives OS Solaris 10 x86_64 (SunOS goldtpus34 5.10 Generic_144489-11 I wanted to find whether it has a 32bit or 64 bit kernel so I did /usr/bin/isainfo -k it says amd64 but when i do file /sbin/init it says ELF 32-bit LSB executable 80386 Version 1, dynamically linked, stripped Also if I do file it says ELF 64-bit LSB executable AMD64 Version 1 [SSE2 SSE FXSR FPU], dynamically linked, not stripped So is it possible to have a Kernel working in 64bit mode but System utils/process spawner(init) in 32bit mode. I am confused. How to accurately get if the OS Kernel is in 64/32 bit mode on Solaris and on Linux?

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  • blackberry mainscreen vertical scroll

    - by pajton
    I am trying to create a MainScreen with vertical scrolling. From what I've read in the documentation, MainScreen has a VerticalManager inside, so it should be possible to enable vertical scrolling only with proper construction, i.e: super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); This is not working for me, however. I am creating a screen, adding a couple of LabelFields and no scrollbar, no scrolling at all. I am testing on 8900, OS 5.0. Here is the code I use: public class ExampleScreen extends MainScreen { public ExampleScreen() { super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); create(); } private void add(String text) { add(new LabelField(text)); } private void create() { add("line 0"); add("line 1"); ... etc ... } } The question is am I doing something wrong? Is there a way to enable vertical scrolling with MainScreen or do I need to create a VerticalManager myself?

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  • Creating notes on facebook through FBConnect in iPhone application

    - by Vin
    Hi All, I have tried FBConnect for iPhone and am able to create/manage sessions and upload pictures successfully. What I can't sort out is, how to create and edit notes. The Facebook documentation says that notes.create query takes three arguments:title, content and uid. It seems I am unable to form the right request for the required query. Please help me on this. Thanks in advance.

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  • Multidimensional arrays in VB.NET 2010

    - by matt_t
    Is there any way to create a multidinensional array that contains arrays of different lengths (similar to nesting arrays of different lengths in python). Because if I were to declare a variable Dim accounts(2,2) As Integer all 1D arrays at each dimension have the same length. Is there any way to create an array so that this is not the case? e.g The above code would create an array like this: [[0,0],[0,0]] but would it be possible to create this: [[0,0],[0,0,0]] Apologies for the poor explanation but I cannot think of any better ways to explain.

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  • How to fill DataGridView from nested table oracle

    - by arkadiusz85
    I want to create my type: CREATE TYPE t_read AS OBJECT ( id_worker NUMBER(20), how_much NUMBER(5,2), adddate_r DATE, date_from DATE, date_to DATE ); I create a table of my type: CREATE TYPE t_tab_read AS TABLE OF t_read; Next step is create a table with my type: enter code hereCREATE TABLE Reading ( id_watermeter NUMBER(20) constraint Watermeter_fk1 references Watermeters(id_watermeter), read t_tab_read ) NESTED TABLE read STORE AS store_read ; Microsoft Visual Studio can not display this type in DataGridView. I use Oracle.Command: C# using Oracle.DataAccess; using Oracle.DataAccess.Client; private void button1_Click(object sender, EventArgs e) { try { //my working class to connect to database ConnectionClass.BeginConnection(); OracleDataAdapter tmp = new OracleDataAdapter(); tmp = ConnectionClass.ReadCommand(ReadClass.test()); DataSet dataset4 = new DataSet(); tmp.Fill(dataset4, "Read1"); dataGridView4.DataSource = dataset4.Tables["Read1"]; } catch (Exception o) { MessageBox.Show(o.Message); } public class ReadClass { public static OracleCommand test() { string sql = "select c.id_watermeter, a. from reading c , table (c.read) a where id_watermeter=1"; ConnectionClass.Command1= new OracleCommand(sql, ConnectionClass.Connection); ConnectionClass.Command1.CommandType = CommandType.Text; return ConnectionClass.Command1; } } I tray: string sql = "select r.id_watermeter, o.id_worker, o.how_much, o.adddate_r, o.date_from, o.date_to from reading r, table (r.read) o where r.id_watermeter=1" string sql = "select a.from reading c , Table (c.read) a where id_watermeter=1" string sql = "select a.id_worker, a.how_much, a.adddate_r, a.date_from, a.date_to from reading c , table (c.read) a where id_watermeter=1" string sql = "select c.id_watermeter, a. from reading c , table (c.read) a where id_watermeter=1" Error : Unsuported Oracle data type USERDEFINED encountered Sombady can help me how to fill DataGridView using data from nested table. I am using Oracle 10g XE

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  • Retrieving Data from SQL Server within Excel 2007

    - by Russell Giddings
    I have the following requirements I have relational content stored in a SQL Server 2005 database. I want to retrieve this data, transform it and display it in an Excel 2007 document. I would like this to be pulled from within Excel at the click of a button. As far as I can tell I have the following options... Create a view in Sql Server and reference it within a pivot table using a data connection. Create an Excel workbook using VSTO and create a web service which the workbook pulls data from Create a web service and use JScript with XMLHTTP request objects I currently only have a little experience of any of these methods (I'm very familiar with SQL Server although not pivot tables, I've created many web services although I've never used VSTO and I've used javascript extensively, but never in the context of Excel manipulation). Would you recommend one of the above approaches or is there a better way to do this?

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  • How do you cache web pages with a personalized header using caching reverse proxy such as Squid, Var

    - by Continuation
    Pretty much every page of my website is dynamically generated. However they don't change that frequently (kinda similar to a forum page). So I'd like to cache them using a caching reverse proxy such as Squid, varnish or Nginx. The problem is that for my logged-in users, each of them will see a personalized header saying "Welcome John Doe. Logout" on the upper right corner of the page (just like serverfault). While users who aren't logged in will see a header that says "Login" instead. So basically even though every user will see the same page in general, they all slightly different version due to that personalized header. Is there any way so that I can cache the "main" part of the page and serve it from cache while generate the personalized header dynamically for each individual user? This must be a very common problem. How is it solved in general?

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  • MS SQL Index Scripting

    - by Fouad Masoud
    I'm using MS SQL 2008. Is it possible to create a script to loop over all tables in a database generating a set of index drop scripts and create scripts separately? What I have to do is drop all indexes on a set of databases to run a heavy data load process but then I want to re-enable all the indexes. I don't want to have to go through each table and script an index drop and then index create. Thanks!

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  • How to setup default attributes in a ruby model

    - by webdestroya
    I have a model User and when I create one, I want to pragmatically setup some API keys and what not, specifically: @user.apikey = Digest::MD5.hexdigest(BCrypt::Password.create("jibberish").to_s) I want to be able to run User.create!(:email=>"[email protected]") and have it create a user with a randomly generated API key, and secret. I currently am doing this in the controller, but when I tried to add a default user to the seeds.rb file, I am getting an SQL error (saying my apikey is null). I tried overriding the save definition, but that seemed to cause problems when I updated the model, because it would override the values. I tried overriding the initialize definition, but that is returning a nil:NilClass and breaking things. Is there a better way to do this?

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  • Can T-SQL function return user-defined table type?

    - by abatishchev
    I have my own type: CREATE TYPE MyType AS TABLE ( foo INT ) and a function receiving it as a parameter: CREATE FUNCTION Test ( @in MyType READONLY ) RETURNS @return MyType AS ... can it return MyType or only TABLE repeating MyType's structure: CREATE FUNCTION Test ( @in MyType READONLY ) RETURNS @return TABLE (foo INT) AS ... ?

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  • BorderLayout problem with JSplitPane after adding JToolbar (Java)

    - by Alex Cheng
    Hello all. Problem: My program layout is fine, as below before I add JToolbar to BorderLayout.PAGE_START Here's a screenshot before JToolbar is added: Here's how it looked like after adding JToolbar: May I know what did I do wrong? Here's the code I used: //Create the text pane and configure it. textPane = new JTextPane(); -snipped code- JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setPreferredSize(new Dimension(300, 300)); //Create the text area for the status log and configure it. changeLog = new JTextArea(5, 30); changeLog.setEditable(false); JScrollPane scrollPaneForLog = new JScrollPane(changeLog); //Create a split pane for the change log and the text area. JSplitPane splitPane = new JSplitPane( JSplitPane.VERTICAL_SPLIT, scrollPane, scrollPaneForLog); splitPane.setOneTouchExpandable(true); //Create the status area. JPanel statusPane = new JPanel(new GridLayout(1, 1)); CaretListenerLabel caretListenerLabel = new CaretListenerLabel("Caret Status"); statusPane.add(caretListenerLabel); //Create the toolbar JToolBar toolBar = new JToolBar(); -snipped code- //Add the components. getContentPane().add(toolBar, BorderLayout.PAGE_START); getContentPane().add(splitPane, BorderLayout.CENTER); getContentPane().add(statusPane, BorderLayout.PAGE_END); //Set up the menu bar. actions = createActionTable(textPane); JMenu editMenu = createEditMenu(); JMenu styleMenu = createStyleMenu(); JMenuBar mb = new JMenuBar(); mb.add(editMenu); mb.add(styleMenu); setJMenuBar(mb); Please help, I'm new to GUI Building, and I don't feel like using Netbeans to drag and drop the UI for me... Thank you in advance.

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  • Are primitive types garbage collected in Android?

    - by snctln
    I know this may be a dumb question, but my background is more in c++ and managing my own memory. I am currently cutting down every single allocation that I can from one of my games to try and reduce the frequency of garbage collection and perceived "lag", so for every variable that I create that is an Object (String and Rect for example) I am making sure that I create it before hand in my constructor and not create temporary variables in simple 10 line functions... (I hope that makes sense) Anyways I was working though it some more tonight and I realized that I may be completely wrong about my assumption on garbage collection and primitive types (int, boolean, float) are these primitive type variables that I create in a 10 line function that gets called 20 times a second adding to my problem of garbage collection? So a year ago every few seconds I would see a message in logcat like GC freed 4010 objects / 484064 bytes in 101ms Now I see that message every 15-90 seconds or so... So to rephrase my question: Are primitive types (int, float, boolean, etc) included when seeing this message?

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  • Scipy sparse... arrays?

    - by spitzanator
    Hey, folks. So, I'm doing some Kmeans classification using numpy arrays that are quite sparse-- lots and lots of zeroes. I figured that I'd use scipy's 'sparse' package to reduce the storage overhead, but I'm a little confused about how to create arrays, not matrices. I've gone through this tutorial on how to create sparse matrices: http://www.scipy.org/SciPy_Tutorial#head-c60163f2fd2bab79edd94be43682414f18b90df7 To mimic an array, I just create a 1xN matrix, but as you may guess, Asp.dot(Bsp) doesn't quite work because you can't multiply two 1xN matrices. I'd have to transpose each array to Nx1, and that's pretty lame, since I'd be doing it for every dot-product calculation. Next up, I tried to create an NxN matrix where column 1 == row 1 (such that you can multiply two matrices and just take the top-left corner as the dot product), but that turned out to be really inefficient. I'd love to use scipy's sparse package as a magic replacement for numpy's array(), but as yet, I'm not really sure what to do. Any advice? Thank you very much!

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