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• Ways to save enums in database

  - by corgrath

  Hey guys. I am wondering what the best ways to save enums into a database is. I know there are name() and valueOf() methods to make it into a String back. But are there any other (flexible) options to store these values? Is there a smart way to make them into unique numbers (ordinal() is not safe to use)? Any comments and suggestions would be helpful :) Update: Thanks for all awesome and fast answers! It was as I suspected. However a note to 'toolkit'; That is one way. The problem is that I would have to add the same methods with each enum type i create. Thats a lot of duplicated code and, at the moment, Java does not support any solutions to this (You cannot let enum extend other classes). However, thanks for all answers!

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• Displaying map stl

  - by BSchlinker

  Declared a map early on: map<char*,char*> rtable; // used to store routing information Now I'm attempting to display the contents of the map: void Routes::viewroutes(){ typedef map<char*, char*>::const_iterator iter; for (iter=rtable.begin(); iter != rtable.end(); ++iter) { cout << iter->second << " " << iter->first << endl; } } Receiving the error "expected primary-expression before '!=' token and for '-' token. Can't seem to understand the error I'm making here. Any ideas?

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• Storing date and time as epoch vs native datetime format in the database

  - by zakovyrya

  For most of my tasks I find it much easier to work with date and time in the epoch format: it's trivial to calculate timespan or determine if some event happened before or after another, I don't have to deal with time-zone issues if the data comes from different geographical sources, in case of scripting languages what I usually get from database when I request a datetime-typed column is a string that I need to parse in order to work with it. This list can go on, but for me in order to keep my code portable that's enough to ditch database's native datetime format and store date and time as integer. What do you guys think?

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• How do I access variables with hyphenated names in Smarty?

  - by abeger

  I've got a PHP page that parses an XML file with SimpleXml, then passes that object to a Smarty template. My problem is that the XML file has hyphens in its tag names, e.g. video-player. In PHP, this is no problem, I just use $xml->{'video-player'} and everything's fine. Smarty, on the other hand, throws a fit when I try to use that syntax. The only solution I've come up with so far is to use a variable to store the name, e.g., { assign var=name value="video-player" } { $xml->$name } But this isn't terribly graceful to say the least. Is there another, better, approach to referring to a hyphenated variable name in Smarty?

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• Interpolation of time series data in R

  - by Pierreten

  I'm not sure what i'm missing here, but i'm basically trying to compute interpolated values for a time series; when I directly plot the series, constraining the interpolation points with "interpolation.date.vector", the plot is correct: plot(date.vector,fact.vector,ylab='Quantity') lines(spline(date.vector,fact.vector,xout=interpolation.date.vector)) When I compute the interpolation, store it in an intermediate variable, and then plot the results; I get a radically incorrect result: intepolated.values <- spline(date.vector,fact.vector,xout=interpolation.date.vector) plot(intepolated.values$x,intepolated.values$y) lines(testinterp$x,testinterp$y) Doesn't the lines() function have to execute the spline() function to retrieve the interpolated points in the same way i'm doing it?

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• Recommendation needed for text content, should I use text files or database?

  - by Jörgen

  I'm doing a web application in asp.net mvc. Now I'm at the point where I do alot of text info such as help texts, eula, privacy policy etc. I realized that I'm not sure what would the best way to store these texts. 1. Directly in the aspx page 2. In text files and then load the text via ViewData[] to the aspx file 3. In my sql database If use option 3 how would I then design the database e.g. eula = table x, privacypolicy=table y? I guess I just need some directions of what't the pros and cons with the options above.

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• iPhone: Core Data: Updating a pre-filled database in future app versions.

  - by Cuzog

  I am creating an app with a database of information that needs to be pre-filled. This data will change in future versions. In the same database, I also need to store user editable information since that user edited data directly relates to the pre-filled data. My question is, if I'm pre-filling the database by creating a duplicate data model in a second app and copying over the core data file before release, how would I handle updates to that data in future versions of the app without destroying the user's existing data? Do the core data migration methods handle this, or must I write custom methods to programatically handle the merge at first app launch?

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• paypal redirect on successful checkout

  - by Graeme Leighfield

  I am trying to get my Paypal subscription to redirect to a custom page after a successful checkout. Before submitting to Paypal I overload the submit handler, run my own function (to store details) and return a unique id. I want to attach that id to my return URL. (as a GET or POST var so to speak) I have turned auto redirect "on" in my Paypal sandbox sellers preferences, but it only seems to re-direct to the URL that I HAVE to put in there. using the <input type="hidden" name="return" value="someurl" /> does no seem to work. I want it this way so that I can capture the user information when entered with a "non-paid" flag, then via the IPN I can update that record with a "PAID" flag, and I want to use the unique ID to tie it all together so to speak. Any advice or a different approach is welcomed. Many thanks!

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• iPhone – How to import/drawing UI graphic elements? CGContextDrawPDFPage?

  - by Ross

  Hello, What is the best way to use the custom UI graphics on the iPhone? I've come across CGContextDrawPDFPage and Panic's Shrinkit. Should I be using storing my vector ui graphics as PDF's and loading them using CGContextDrawPDFPage to draw them. I did previously asked what way Apple store their UI graphics and was answered crushed png. The options as I see it, but I would really want to know what technique other people use. This question is for vector graphics only. Looking for what is standard / most effective / most efficient. PNG (bitmapped image) Custom UIView drawing code (generated from Opacity) PDF (I've not used this method, is it with CGContextDrawPDFPage?) Many thanks Ross

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• sproutcore - todos tutorial, addbutton not responding in firefox

  - by kristian nissen

  I'm testing the sproutcore todo's tutorial and I have checked the code in step-5 and it's identical to my code at least as far as I can see, but the addButton is not responding to click events. addTask: function () { var task; task = Sinatra.store.createRecord(Sinatra.Task, { 'description': 'New Task', 'isDone': false, 'priority': 1 }); this.selectObject(task); this.invokeLater(function () { var contentIndex = this.indexOf(task); var list = Sinatra.mainPage.getPath('mainPane.middleView.contentView') var listItem = list.itemViewForContentIndex(contentIndex); listItem.beginEditing(); }); return YES; and in the main: addButton: SC.ButtonView.design({ layout: { centerY: 0, height: 24, right: 12, width: 100 }, title: 'Add Task', target: 'Sinatra.tasksController', action: 'addTask' }), I can't see the problem, please help. (I have only tested this in firefox on kubuntu)

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• Zend Framework - POP3 - retrieving message source

  - by pako

  Is it possible to retrieve the complete message source (similar tu Unix Mbox format) using Zend_Mail_Storage_Pop3 from the Zend Framework? I'm using the following code to retrieve messages: $mail = new Zend_Mail_Storage_Pop3(array('host' => 'localhost', 'user' => 'test', 'password' => 'test')); echo $mail->countMessages() . " messages found\n"; foreach ($mail as $message) { echo "Mail from '{$message->from}': {$message->subject}\n"; } It looks like the $mail object contains the message already split up into fields (ie. headers, contents, etc.). Is there any way to retrieve the original message source? I would like to be able to store it so if I need to parse the message again using a different tool, I will have the necessary information.

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• Subclassing Satchmo's Category model, but then getting the error "'Manager' object has no attribute 'root_categories'"

  - by hellsgate

  I'm using Satchmo as part of a website I'm currently building. At the moment I'm trying add more functions to the Satchmo Category class, but obviously I'm not going to make any changes to the Satchmo files. So, I thought that subclassing the Category class would give me a new class which contains all the Satchmo Category properties and methods while allowing me to add my own. However, either Python subclassing doesn't work like that, or I am doing it wrong. Here is the code I'm using to subclass Category: from product.models import Category class MyCategory(Category): """ additional functions to pull data from the Satchmo store app """ One of the methods I can normally use from the Category class is: Category.objects.root_categories() however, when I try to access MyCategory.objects.root_categories() I get the following error: AttributeError: 'Manager' object has no attribute 'root_categories' Can anyone point me in the right direction for solving this?

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• Why use multiple OpenGL context

  - by Luca

  For rendering I have a current GL context, associated to a window. In the case the application render multiple scenes (for example using accumulation or different viewports) I think it is ok to reuse the same context. My question, indeed, is: why should I use multiple GL context? I red on ARB_framebuffer_object extension spec that MakeCurrent call could be expansive, and in the case the ARB_framebuffer_object extension is present I can render on a generic buffer without using MakeCurrent. Apparently the only reason to use multiple GL context is to avoid to setup context state (pixel store, transfer, point size, polygon stipple...) or to have avaialable multiple render buffers configuration (one context with accumulation, another without). How to determine when is better an alternative context instead of setting context state? Thankyou all!

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• .NET Lambda Pass Method Parameter

  - by RM

  Hi All, I hope i'm missing something obvious, but I'm having some troubles defining a method that takes a parameter of a method to fetch the method information for the passed method. I do NOT want actually execute the method. I want to be able to do: busObject.SetResolverMethod<ISomeInterface>(x=>x.GetNameById); Where GetNameById is a method defined on the interface ISomeInterface. In this case, an example of the method being passed in's signature would be: MyVarA GetNameById(int id){ .... } In the above example, the SetResolverMethod's body should be able to return / store the string "GetNameById". There is no standard signature the method being passed in will conform to (except that it will always return an object of some kind). Currently I'm setting the method as a string (i.e. "GetNameById"), but I want it to be compile time checked, hence this question.

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• Problem With HTML5 Application Cache Whitelist - Won't Ignore Items

  - by Ryan Donnelly

  I'm trying to use HTML5 Application Cache to speed some things up on an iPhone webapp. It works great for storing images, css and JS, but the problem is that it also tries to store the HTML. I haven't been able to get it to ignore the html and stop storing it in the cache. From what I've read, I have to "whitelist" the files and directories that I want to load no matter what. I've tried listing the files I want cached explicitly, and I've tried adding a series of things under the "NETWORK:" heading. I've tried * / /* http://mysite.com http://mysite.com/ http://mysite.com/* None of them seem to work. Is there any way to ignore HTML files by MIME-Type or anything? Any advice would be appreciated. Ryan P.S. Of course, my site is not mysite.com..I just used that for simplicity.

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• save and restore state of a tab bar controller

  - by phunehehe

  I have an application that has a UITabBarController with two tabs, each having its own navigation controller. Now I want to store the state of the application when the user closes it, so that when the user relauches the application will show the same place as the last time before it was closed. So, in applicationWillTerminate: I have [NSKeyedArchiver archiveRootObject:tabBarController toFile:@"lastVisitedTab"]; Then, in applicationDidFinishLaunching: I have UITabBarController *last= (UITabBarController *)[NSKeyedUnarchiver unarchiveObjectWithFile:@"lastVisitedTab"]; if (last) tabBarController = [last retain]; I also have an extension to UIImage to make it compliant to NSCoding. However, this doesn't work, as the state is not preserved. The first tab gets selected all the time, and no navigation is preserved either. Can someone tell me what's wrong, or show me how to do it correctly?

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• Inserting Large volume of data in SQL Server 2005

  - by Manjoor

  We have a application (written in c#) to store live stock market price in the database (SQL Server 2005). It insert about 1 Million record in a single day. Now we are adding some more segment of market into it and the no of records would be double (2 Millions/day). Currently the average record insertion per second is about 50, maximum is 450 and minimum is 0. To check certain conditions i have used service broker (asynchronous trigger) on my price table. It is running fine at this time(about 35% CPU utilization). Now i am planning to create a in memory dataset of current stock price. we would like to do some simple calculations. I want to know different views of members on this. Please provide your way of dealing with such situation.

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• Shortest-path algorithms which use a space-time tradeoff?

  - by Chris Mounce

  I need to find shortest paths in an unweighted, undirected graph. There are algorithms which can find a shortest path between two nodes, but this can take time. There are also algorithms for computing shortest paths for all pairs of nodes in the graph, but storing such a lookup table would take lots of disk space. What I'm wondering: Is there an algorithm which offers a space-time tradeoff that's somewhere between these two extremes? In other words, is there a way to speed up a shortest-path search, while using less disk space than would be occupied by an all-pairs shortest-path table? I know there are ways to efficiently store lookup tables for this problem, and I already have a couple of ideas for speeding up shortest-path searches using precomputed data. But I don't want to reinvent the wheel if there's already some established algorithm that solves this problem.

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• Does it take time to deallocate memory?

  - by jm1234567890

  I have a C++ program which, during execution, will allocate about 3-8Gb of memory to store a hash table (I use tr1/unordered_map) and various other data structures. However, at the end of execution, there will be a long pause before returning to shell. For example, at the very end of my main function I have std::cout << "End of execution" << endl; But the execution of my program will go something like $ ./program do stuff... End of execution [long pause of maybe 2 min] $ -- returns to shell Is this expected behavior or am I doing something wrong? I'm guessing that the program is deallocating the memory at the end. But, commercial applications which use large amounts of memory (such as photoshop) do not exhibit this pause when you close the application. Please advise :)

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• Storing Configurations into Active Direcotry Application Mode

  - by Khurram Aziz

  I have a network devices polling and do actions kind of app; currently it keeps the configuration (which devices to poll, what kind of device, ip, login, password etc) in the database. My network administrator wants that this information is stored in some LDAP server so that he maintain single store of configuration which he himself can use in other apps/scripts etc. I am looking for some article that walks me through setting up ADAM/AD LDS for storing configuration by authoring custom schema etc and how to setup some authentication infrastructure to protect the data.

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• Linux ext3 readdir and concurrent updates

  - by Wangnick

  Dear all, we are receiving about 10000 messages per hour. We store them as individual files in hourly directories on an ext3 filesystem. The file name includes a sequence number. We use rsync to mirror these files every 20 seconds at another location (via a SAN, but that doesn't matter). Sometimes an rsync run picks up files n-3, n-2, n-1, n+1, and then next rsync run continues with n, n+2, n+3, n+4 and so on. Is it possible that when one process creates files in a certain sequence within a directory, that another process using readdir() sees the files appearing in a different sequence? Kind regards, Sebastian

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• Restlet/Jackson works differently when object implements Serializable

  - by ravyoli

  I am sending an object with some primitive fields using Restlet with Jackson converter. Up until now it worked great. But then I needed my object to implement Serializable, because I need to store it in memcache of GAE. For some reason - when the class implements Serializable, things stop working. Restlet sends a different string representation from before, and I can't even print that string in the server. I tried printing its byte value, char-by-char and the first numbers are: 0xfffd 0xfffd 0x0000 0x0005 0x0073 0x0072 Thanks a lot!

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• Need a way for users to enter data while offline and re-submit it when back online

  - by crankharder

  As part of a larger webapp, I want to build functionality that allows a user to enter data while offline -- and then send that data back to my site when they have a connection again The parts that, to me, are missing ar Saving a certain set of data in their browser Saving a form that allows them to enter data using form from step#2 to update data from step#1 getting data out of the local data store and sending it back to the server I would like to keep this entirely within the browser, so... Does HTML5 meet some (or all) of those goals as it's currently implemented in webkit/ff3? If not,what technologies should I start looking into in order to accomplish all of the above.

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• How to remove my backslash while input have underscore

  - by bob

  Problem when I enter any input which has underscore (_) data will store to my db looks like this image\_background.png Example $image = stripslashes($_POST['image']); // example image name image_background.png $query = 'UPDATE product SET image="' . $db->string_escape($image, true) . '" WHERE id="' . intval($id) . '"'; The problem coming when input has underscore only. If without underscore all backslashes will remove by the stripslashes Let me know.

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• how to implement color search with sphinx?

  - by harald

  hello, searching a photo by dominant colors using mysql is quite simple. assuming that the r,g,b values of the most dominant colors of the photo is already stored in the database, this could be achieved for example by something like: SELECT * FROM colors WHERE ABS(dominant_r - :r) < :threshold AND ABS(dominant_g - :g) < :threshold AND ABS(dominant_b - :b) < :threshold i wonder, if it's anyhow possible to store the colors in sphinx and perform the querying using the sphinx search engine? thanks!

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