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Articles indexed in March 2010

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  • for TimeWithZone object, how to change the zone part only?

    - by leomayleomay
    I have a table Coupon with a field expired_at, which is of datetime type, and before I save the record, I want to change the zone part of the field according to the user's choice. Say, c = Coupon.new c.expired_at = DateTime.now c.expired_at_timezone = "Arizona" c.save! and in the coupon.rb class Coupon << ActiveRecord::Base def before_save # change the zone part here, leave the date and time part alone end end What I'm saying is if the admin want the coupon expired at 2014-07-01 10:00 am, Arizona time, the expired_at stored in the db should be like this: Tue, 01 Jul 2014 10:00:00 MST -07:00 is there any way I can modify the zone part only and leave the date and time part alone? Thanks

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  • What is the best way to findout whether a date falls in particular range?

    - by Amit
    I tried the following DateTime start = Convert.ToDateTime(TextBox1.Text); DateTime end = Convert.ToDateTime(TextBox2.Text); if (DateTime.Now.Date == start.Date || DateTime.Now.Date == end.Date || (DateTime.Now >= start.Date && DateTime.Now <= end.Date)) { lblResult.Text = "true"; } else { lblResult.Text = "false"; } This verifies if the date range is one day also. Any way to reduce the number of conditions above?

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  • Sending data between activities within my app?

    - by user246114
    Hi, I have a TabActivity, and the tabs point to sub activities. Is there a way I can send a 'message' to those child activities? I just want to pass a string across, not sure if this is possible. I have some data being fetched by the parent TabActivity, and the child tabs can't do anything useful until the parent is done fetching. When fetching is complete, I'd like to pass that data to the child activities so they can do something useful with it. Notmally I'd set the data to be passed in the Intent when first creating the activity, but in this case I can't do that. Thanks

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  • show loading gif of image only if it is really loading it for the first time

    - by Y.G.J
    i have 2 img elements. 2 id's for them: rimg and limg. limg is the loading gif and rimg is the reloaded full vertsion of the image. the is the code to show the loading before image finish to load: $("#limg").fadeIn("fast"); $("#rimg").attr("src",$(that).attr("bsrc")).load(function(){ $("#limg").fadeOut("fast",function () { $("#rimg").attr("alt",$(that).attr("alt")); $("#rimg").fadeIn("normal"); }); }); if i log into the site for the first time, it shows me the loading gif. if it is not my first time it is still showing that but i need the loading to be smooth without that loading how can i check if the image is loaded and cached before showing the loading gif?

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  • Is HttpContextWrapper all that....useful?

    - by bakasan
    I've been going through the process of cleaning up our controller code to make each action as testable. Generally speaking, this hasn't been too difficult--where we have opportunity to use a fixed object, like say FormsAuthentication, we generally introduce some form of wrapper as appropriate and be on our merry way. For reasons not particularly germaine to this conversation, when it came to dealing with usage of HttpContext, we decided to use the newly created HttpContextWrapper class rather than inventing something homegrown. One thing we did introduce was the ability to swap in a HttpContextWrapper (like say, for unit testing). This was wholly inspired by the way Oren Eini handles unit testing with DateTimes (see article, a pattern we also use) public static class FooHttpContext { public static Func<HttpContextWrapper> Current = () => new HttpContextWrapper(HttpContext.Current); public static void Reset() { Current = () => new HttpContextWrapper(HttpContext.Current); } } Nothing particularly fancy. And it works just fine in our controller code. The kicker came when we go to write unit tests. We're using Moq as our mocking framework, but alas var context = new Mock<HttpContextWrapper>() breaks since HttpContextWrapper doesn't have a parameterless ctor. And what does it take as a ctor parameter? A HttpContext object. So I find myself in a catch 22. I'm using the prescribed way to decouple HttpContext--but I can't mock a value in because the original HttpContext object was sealed and therefore difficult to test. I can map HttpContextBase, which both derive from--but that doesn't really get me what I'm after. Am I just missing the point somewhere with regard to HttpContextWrapper? I can find ways to work around the issue, but we are kind of fond of remaining consistent in decoupling using the Function delegate pattern--but it seems like we're not fully grokking intent of the wrapper.

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  • [PHP] MySql Proccesslist filled with "Sleep" Entries leading to "To many Connections" ?

    - by edorian
    Hi, i'd like to ask your help on a longstanding issue with php/mysql connections. Every time i execute a "SHOW PROCESSLIST" command it shows me about 400 idle (Status: Sleep) connections to the database Server emerging from our 5 Webservers. That never was much of a problem (and i didn't find a quick solution) until recently traffic numbers increased and since then MySql reports the "to many connections" Problems repeatedly, even so 350+ of those connections are in "sleep" state. Also a server can't get a mysql connection even if there are sleeping connection to that same server. All those connections vanish when a apache server is restated. The PHP Code used to create the Database connections uses the normal "mysql" Module, the "mysqli" Module, PEAR::DB and Zend Framework Db Adapter. (Different projects). NONE of the projects uses persistent connections. Raising the connection-limit is possible but doesn't seem like a good solution since it's 450 now and there are only 20-100 "real" connections at a time anyways. My question: Why are there so many connections in sleep state and how can i prevent that. Thank you for your time, if theres anything unclear or missing please let me know

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  • What question(s) does an object's behavior answer?

    - by Corwin
    Reading a book I have found the following statement: (Object) Behaviors answer either of two questions: What does this object do (for me)? or What can I do to this object? In the case of an orange, it doesn’t do a whole lot, but we can do things to it. One behavior is that it can be eaten. In my understanding of object behaviour the statement above is correct regarding the first question and is incorrect in case of the second. However, I often see classes with methods like Orange::eat(), and this makes me uncertain about my design skills. So I would like to ask is it a design mistake to give oranges a behaviour eat? (oranges and eat are used just for example)

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  • How to make a product catalog in C#?

    - by Ervin
    I need to develop a product catalog (about 4000 products) application, which would be given to clients on CD or DVD. The catalog exists in webpage format using PHP and MySQL. IMPORTANT: the application is given to clients who maight have old PC, old System. For minimal requirements I would put Windows XP and Internet Explorer 6 (if needed). I need the following features: 1 search option (after productID AND after keyword) 2 print option (by selecting multiple products) 3 shopping cart (making a list which will be sent to an email address if there is any Internet Connection on the computer) When I was asked to do it I had 2 days to realise a very basic version, so I took the whole website and exported it in HTML pages, and developed an application in C# which contains an embeded browser. So the whole website is now static and put on a CD. Everything fine so far. Now here are the problems: 1. the search option was realized by parsing the html files and reading the productID or looking for keywords inside of them. Put on a CD it was extremely slow (searching in 600MB of html files). FOR THIS I WOULD NEED A SOLUTION WITH A STATIC DATABASE (USING ACCESS OR SOMETHING) TO HAVE INDEXED ROWS, SO THE SEARCH COULD BE A VERY FAST ONE. 2. the printing option was a simply call of the embeded Internet Explorer print functions. Here are two problems: a) user needs IE7 for printing the website scaled (FIT TO PAGE), otherwise the edges of the page are cut down. b) users of this app does not have even the basic PC usage skills, so they can't set the printing settings, so there will appear in header and footer the page numbers and titles. QUESTION: can I set these settings from CSS for printing? 3. couldn't make a a shopping cart as I don't use a database, so I have static websites and content is inside the HTML. QUESTION: WHICH ARE THE BEST SOLUTIONS FOR THE PROBLEMS DESCRIBED ABOVE? PLEASE ANSWER EVEN IF YOUR ANSWER IS FOR ONE QUESTION ONLY. THANKS

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  • is delete p where p is a pointer to array a memory leak ?

    - by Eli
    following a discussion in a software meeting I setup to find out if deleting an dynamically allocated primitive array with plain delete will cause a memory leak. I have written this tiny program and compiled with visual studio 2008 running on windows XP: #include "stdafx.h" #include "Windows.h" const unsigned long BLOCK_SIZE = 1024*100000; int _tmain() { for (unsigned int i =0; i < 1024*1000; i++) { int* p = new int[1024*100000]; for (int j =0;j<BLOCK_SIZE;j++) p[j]= j % 2; Sleep(1000); delete p; } } I than monitored the memory consumption of my application using task manager, surprisingly the memory was allocated and freed correctly, allocated memory did not steadily increase as was expected I've modified my test program to allocate a non primitive type array : #include "stdafx.h" #include "Windows.h" struct aStruct { aStruct() : i(1), j(0) {} int i; char j; } NonePrimitive; const unsigned long BLOCK_SIZE = 1024*100000; int _tmain() { for (unsigned int i =0; i < 1024*100000; i++) { aStruct* p = new aStruct[1024*100000]; Sleep(1000); delete p; } } after running for for 10 minutes there was no meaningful increase in memory I compiled the project with warning level 4 and got no warnings. is it possible that the visual studio run time keep track of the allocated objects types so there is no different between delete and delete[] in that environment ?

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  • Most useful parallel programming algorithm?

    - by Zubair
    I recenty asked a question about parallel programming algorithms which was closed quite fast due to my bad ability to communicate my intent: http://stackoverflow.com/questions/2407631/what-is-the-most-useful-parallel-programming-algorithm-closed I had also recently asked another question, specifically: http://stackoverflow.com/questions/2407493/is-mapreduce-such-a-generalisation-of-another-programming-principle/2407570#2407570 The other question was specifically about map reduce and to see if mapreduce was a more specific version of some other concept in parallel programming. This question (about a useful parallel programming algorithm) is more about the whole series of algorithms for parallel programming. You will have to excuse me though as I am quite new to parallel programming, so maybe MapReduce or something that is a more general form of mapreduce is the "only" parallel programming construct which is available, in which case I apologise for my ignorance

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  • How to build a simulation of a login hardware token in .Net

    - by Michel
    Hi, i have a hardware token for remote login to some citrix environment. When i click the button on the device, i get an id and i can use that to login to the citrix farm. I can click the button as much as i like, and every time a new code gets generated, and they all work. Now i want to secure my private website likewise, but not with the hardware token, but with a 'token app' on my phone. So i run an app on my phone, generate a key, and use that to (partly) authenticate myself on the server. But here's the point: i don't know how it works! How can i generate 1, 2 or 100 keys at one time which i can see (on the server) are all valid, but without the server and the phone app having contact (the hardware token also is an 'offline' solution). Can you help me with a hint how i would do this? This is what i thought of so far: the phone app and the server app know (hardcoded) the same encryption key. The phone app encrypts the current time. The server app decrypts the string to the current time and if the diff between that time and the actual server time is less than 10 minutes it's an ok. Difficult for other users to fake a key, but encryption gives such nasty strings to enter, and the hardware token gives me nice things like 'H554TU8' And this is probably not how the real hardware token works, because the server and the phone app must 'know' the same encryption key. Michel

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  • Android Convert Central Time to Local Time

    - by chedstone
    I have a MySql database that stores a timestamp for each record I insert. I pull that timestamp into my Android application as a string. My database is located on a server that has a TimeZone of CST. I want to convert that CST timestamp to the Android device's local time. Can someone help with this?

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  • Data take on with Drupal 6

    - by Robert MacLean
    We are migrating our current intranet to Drupal 6 and there is a lot of data within the current system which can be classified into: List data, general lists of fields. Common use is phone list of the employees phone numbers. Document repository. Just basically a web version of a file share for documents. I can easily get the data + meta infomation out, but how do I bulk upload the two types of data into Drupal, as uploading the hundred of thousands of items manually is just not acceptable.

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  • Server purchase advice AMD Opteron

    - by maruti
    Dell PE2970 with AMD Opteron 6core 2431 2.4GHz + 64GB 667Mhz RAM - 2435 is not available with Dell now Dell R905 with AMD Opteron 8435 2.6 GHz + 64GB 800Mhz RAM - but this CPU is 4-8 way, I have chosen only 2P config Both are very close on price and I am leaning towards the R905, please advise.

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  • Retrieve user details from Active Directory using SID

    - by er4z0r
    Hi, How can I find a user in my AD when I have his/her SID. I don't want to rely on other attributes, since I am trying to detect changes to these. Example: I get a message about a change to user record containing: Message: User Account Changed: Target Account Name: test12 Target Domain: DOMAIN Target Account ID: %{S-1-5-21-3968247570-3627839482-368725868-1110} Caller User Name: Administrator Caller Domain: DOMAIN Caller Logon ID: (0x0,0x62AB1) Privileges: - I want to notify the user about the change. So I need their account-information from AD. When I try to retrieve the user's data from AD via VBScript like this: Wscript.StdOut.writeLine "Found an Account ID: " & objMatch.value Set objUser = GetObject("LDAP://GUID=1521396824757036278394823687258681110") Wscript.StdOut.writeLine objUser I receive an error stating The handle is invalid Code:80070006

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  • Long lag and errors clicking gmail links in google chrome

    - by Doug T.
    I recently downloaded Google Chrome with Ubuntu 9.04 and love it. Ironically one site I consistently have issues with is gmail. When I enter gmail I will click a link, say an email or the inbox link. After a very long wait (on the order of 30 seconds to a couple of minutes) my page will load with an error such as: Some Gmail features have failed to load due to an Internet connectivity problem. If this problem persists, try reloading the page, using the older version, or using basic HTML mode. Learn More. Googling the symptoms has not helped. Has anyone else had any similar issues? Has anything helped?

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  • iPhone contact list emptied due to faulty sync?

    - by i-g
    When I'm in an area with unreliable AT&T cell data reception (e.g. all of Manhattan during the day), my contact list sometimes disappears, and does not reappear for an extended period of time, sometimes hours. Does anyone know why this would happen? Would using manual-only sync remedy this? If I'm using manual sync by turning push sync off, how do I trigger a manual sync?

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  • Connect work laptop (domain) to home workgroup

    - by jjeaton
    Is there an easy way to have my work laptop connect to a home workgroup for file sharing with my other PCs, but then easily switch back to connecting to my work domain when I'm at work? I have the following setup: Windows 7 Home Premium Server/HTPC 2 Windows XP laptops 1 Vista laptop (Work) The work laptop connects to a work domain, the remaining computers are on a home workgroup for sharing files/printer. Also is it possible to share files over my LAN while I'm connected to the work domain, but at home? I've tried Live Mesh, but my 2 home laptops are very slow and don't work well with it. I also use Dropbox, but I'd like to be able to share larger files. I may be missing a simple solution here...

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