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  • Should Competent Programmers be "Mathematically Inclined"

    - by Abhijeet Patel
    From a blog post by Jeff Atwood of the same title, I can tell from personal experience that it's much more easier to grasp math after having worked professionally as a developer for a while. I appreciate math much more as I can see it's real world applicability. Can you recommend any resources/books that can help become familiar and comfortable with the kind of math concepts that developers should be familiar with for being well rounded and effective developers.

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  • C# ASPNET MVC - How do you use ModelState.IsValid in a jquery/ajax postback?

    - by JK
    From what I've seen ModelState.IsValid is only calculated by the MVC frame work on a full postback, is that true? I have a jquery postback like so: var url = "/path/to/controller/myaction"; var id = $("#Id").val(); var somedata = $("#somedata").val(); // repeated for every textbox $.post(url, { id: id, somedata: somedata }, function (data) { // etc }); And the controller action looks like: public JsonResult MyAction(MyModel modelInstance) { if (ModelState.IsValid) { // ... ModelState.IsValid is always true, even when there is invalid data } } But this does not seem to trigger ModelState.IsValid. For example if somedata is 5 characters long, but the DataAnnotation says [StringLength(3)] - in this case ModelStae.IsValid is still true, because it hasn't been triggered. Is there something special I need to do when making a jquery/ajax post instead of a full post? Thanks!

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  • Core Data passing context between methods on secondary threads

    - by JK
    My app spawns a secondary thread for some core data store maintenance. In the secondary thread, I set up a context which I then pass to other methods e.g. [self editEntriesInContext:context]. However, this causes objects fetched from the context to become invalidated in editEntries... Why does this occur? I thought the only requirements were for the secondary thread to have its own context and managed objects, which I adhere to. (Note: The context is properly retained)

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  • Netbook for DOTNET Development

    - by Abhijeet Patel
    I'm looking for a netbook to do some dotnet development. Is there a recommended brand/configuration. I'm looking for reasonably good performance. Here are some of my requirements: Win 7 ultimate MS Office VS 2008 and VS 2010 when it's out CodeRush good size keyboard without having to do a Fn+Key for Insert, Home, End and Del keys Preferably Core 2 Duo Decent battery life P.S. The config of the netbook handed out at PDC seems pretty awesome.

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  • Core Data multi-threading

    - by JK
    My app starts by presenting a tableview whose datasource is a Core Data SQLite store. When the app starts, a secondary thread with its own store controller and context is created to obtain updates from the web for data in the store. However, any resulting changes to the store are not notified to the fetchedresults controller (I presume because it has its own coordinator) and consequently the table is not updated with store changes. What would be the most efficient way to refresh the context on the main thread? I am considering tracking the objectIDs of any objects changed on the secondary thread, sending those to the main thread when the secondary thread completes and invoking "[context refreshObject:....] Any help would be greatly appreciated.

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  • Temporary table resource limit

    - by Jk
    Hi, i have two applications (server and client), that uses TQuery connected with TClientDataSet through TDCOMConnection, and in some cases clientdataset opens about 300000 records and than application throws exception "Temporary table resource limit". Is there any workaround how to fix this? (except "do not open such huge dataset"?) update: oops i'm sorry there is 300K records, not 3 millions..

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  • Prevent UIGestureRecognizer from firing selector more than once

    - by JK
    I utilize a UILongPressGestureRecognizer in my app. This is a continuous gesture recognizer which means it continuously fires the selector for the target it was initialized with. I would like the selector to be fired only once. I have tried to prevent further selectors being fired by setting the gesture recognizer's enabled property to Note the first time the selector is fired, but this only takes effect after the selector is fired again. How can I ensure the selector is fired only once?

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  • CFNetwork / NSURLConnection leak

    - by JK
    Running instruments on the device, I intermittently incur a memory leak of exactly 3.5 KB in CFNetwork, the responsible frame being "HostLookup_Master::HostLookup...." I have read a number of questions re this issue and have separately tried the following to fix the leak: Included the following in applicationDidFinishLaunching: NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil]; [NSURLCache setSharedURLCache:sharedCache]; [sharedCache release]; Specified in the urlrequest not to load from the local cache. None of the above worked. My class that instantiates the connections does not leak as its instances are released when data has been downloaded. I have verified this by confirming the the living objects of the class is 0 using Instruments. Any advice on addressing this leak would be greatly appreciated.

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  • no page break in rdlc report

    - by Vikram Patel
    i want to see output of my rdlc report as a continuous report, not page by page, in my browser using reportviewer (just like as in pdf files). i don't want to click "next page" button every time to see next page of the report in my browser.

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  • How do I access data from local XML files in a webOS application on the Palm Pre?

    - by Brijesh Patel
    I am new at Mojo framework and Palm webOS. I want to just retrieve data from XML files using xmlhttprequest (Ajax). I am trying to get data from following script. this.items = []; var that = this; var request = new Ajax.Request("first/movies.xml", { method: 'get', evalJSON: 'false', onSuccess:function(transport){ var movieTags = transport.responseXML.getElementsByTagName('movie'); for( var i = 0; i < movieTags.length; i++ ){ var title = movieTags[i].getAttribute('title'); that.items.push({text: title}); } }, onFailure: function(){ alert('Something went wrong...') } }); My XML files are in the first/movies.xml folder. From that I am trying to access and retrieve data. but not display anything in the screen of Palm Pre emulator. So can anyone is having idea about this issue? Please give a link where can I find the source code for getting data from XML files in webOS.

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  • printing ant target execution time

    - by Nirmal Patel
    I want to print the execution time taken for each individual ANT target and its dependent targets. <target name="target1" depends="target2, target3"> .... </target> When run should show following output Target 2 - x seconds Target 3 - y seconds Target 1 - z seconds Any suggestions on how to achieve this?

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  • stored procedures, error #1312, CLIENT_MULTI_RESULTS flag

    - by aadersh patel
    i am writing stored procedures in MySQL that return values; CREATE PROCEDURE getCustomerById (id int) BEGIN SELECT * FROM customer WHERE customer.id = id; END; and i get the error that the results cannot be shown in the given context. after some googling, i think that i need to set the flag "CLIENT_MULTI_RESULTS" - i am connecting the database from JDBC using a java app, but cant find where to set it! any suggestions?

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  • Crystal Server Enterprise 11

    - by Amar Patel
    Is there a way to construct a URL that when the user is redirected to, displays the report. I am running Crystal Enterperise server 11. I have created a folder in which the report exists. I can want to know what the URL should be. I am running the Tomcat web/application server that came with Crystal Enterprise server 11. I can get the token so that the user does not have to login.

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  • git stash blunder:

    - by Chirag Patel
    I did a git stash pop and ended up with merge conflicts. I removed the files from the file system and did a git checkout as shown below, but it thinks the files are still unmerged. I then tried replacing the files and doing a git checkout again and same result. I event tried forcing it with -f flag. Any help would be appreciated! chirag-patels-macbook-pro:haloror patelc75$ git status app/views/layouts/_choose_patient.html.erb: needs merge app/views/layouts/_links.html.erb: needs merge # On branch prod-temp # Changes to be committed: # (use "git reset HEAD <file>..." to unstage) # # modified: db/schema.rb # # Changed but not updated: # (use "git add <file>..." to update what will be committed) # (use "git checkout -- <file>..." to discard changes in working directory) # # unmerged: app/views/layouts/_choose_patient.html.erb # unmerged: app/views/layouts/_links.html.erb chirag-patels-macbook-pro:haloror patelc75$ git checkout app/views/layouts/_choose_patient.html.erb error: path 'app/views/layouts/_choose_patient.html.erb' is unmerged chirag-patels-macbook-pro:haloror patelc75$ git checkout -f app/views/layouts/_choose_patient.html.erb warning: path 'app/views/layouts/_choose_patient.html.erb' is unmerged

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  • Dyanmic crm onSave change the value

    - by jk
    Hi I got one assignment on Dynamic CRM 4. We have one custome entity and it has one attribute called 'Issue Number' this attributes value generated by Plug-in when it save. When form will created meaning onLoad it will display blank value(text box is empty). But now we want to check that number is existing then concate with some random number. For that I wrote following javascript. if((event.Mode == 1) || (event.Mode == 2) ) { var varIssueNumber = crmForm.all.new_issueNumber.DataValue; alert(varIssueNumber); } but it is giving 'null'. Can anybody please let me know how can I get the value of text field? thanks in advance

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  • JQuery UI Autocomplete - disallow free text entry?

    - by JK
    Is it possible to disallow free text entry in the JQuery UI autocomplete widget? eg I only want the user to be allowed to select from the list of items that are presented in the autocomplete list, and dont want them to be able to write some random text. I didn't see anything in the demos/docs describing how to do this. http://jqueryui.com/demos/autocomplete/ I'm using autocomplete like this $('#selector').autocomplete({ source: url, minlength: 2, select: function (event, ui) { // etc }

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  • Scroll UITableViewCell above keyboard for small tableview

    - by JK
    I have a tableview which is added to a UIViewController as the tableview only fills the bottom 3/4 of the screen.The rows contain editable UITextFields. When a field is tapped, the keyboard appears but the table does not scroll upwards as would normally be the case. Consequently, the keyboard obscures the field being edited. I have tried calling [tableView scrollToRowAtIndexPath:(NSIndexPath *)indexPath atScrollPosition:(UITableViewScrollPosition)scrollPosition animated:(BOOL)animated] but this has no effect if the table contains only a few rows. How can I get the table to scroll a specific cell above the keyboard? Thank you

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  • What is system() in linux

    - by Satish Patel
    I am an absolute beginner with Linux Operating system and just for fun in terminal I typed system() what happened next is as below: satish@satish-Inspiron-N5010 ~ $ system() >#include<iostream> >int main() bash: syntax error near unexpected token 'int' satish@satish-Ispiron-N5010~ $ Here I want to know that what is system() ? what is it's role here? why I got error in int main() line? What can we do with C/C++ programming in terminal?

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  • How to make linq master detail query for 0..n relationship?

    - by JK
    Given a classic DB structure of Orders has zero or more OrderLines and OrderLine has exactly one Product, how do I write a linq query to express this? The output would be OrderNumber - OrderLine - Product Name Order-1 null null // (this order has no lines) Order-2 1 Red widget I tried this query but is not getting the orders with no lines var model = (from po in Orders from line in po.OrderLines select new { OrderNumber = po.Id, OrderLine = line.LineNumber, ProductName = line.Product.ProductDescription, } ) I think that the 2nd from is limiting the query to only those that have OrderLines, but I dont know another way to express it. LINQ is very non-obvious if you ask me!

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