Search Results

Search found 4999 results on 200 pages for 'derived instances'.

Page 144/200 | < Previous Page | 140 141 142 143 144 145 146 147 148 149 150 151  | Next Page >

• Finding records within a 5 min time interval in SQL

  - by Mellonjollie

  I have a table with over 100,000 rows that contain the following columns: ID, Time, and Boolean. The time column tracks time down to the second. I need a query that will find all instances of Boolean = 1 for every 5 minute interval of time from the start of the table to the end, then group the count by time interval. The table represents 4 hours of data, so I should get 48 rows of results. I'm using MS SQL Server. I've tried a few approaches, but the time interval logic is giving me a hard time.

  Read the article

• What is the best instance type to use for hosting a website on ec2?

  - by Josh

  Amazon offers two instance types on EC2: 1) On-Demand and 2) Reserved. After reading the docs on these, I don't really understand the difference from an end-user perspective. More specifically, I'd like to know the answer to this question: is one or the other better for web applications? Based on their names and descriptions, it seems as though on-demand instances may get wiped away from the server altogether if they're not in use which means that they need to be restarted when a request finally does come in. That seems like a pretty bad thing for a website. Am I just misinterpreting the docs? Thanks!

  Read the article

• open program once with multiple files as arguments from explorer

  - by Jonathan

  I have a program that works when, a file is opened with it using the right click menu in explorer. But if I select multiple files and then right click and open with my program then it opens multiple instances of my program, instead of just passing the multiple files as arguments to a single instance. The program is written in vb.net but is not a windows form, it is just a module, so I can to tick the Single instance option in the properties in Visual Studio. So how do I open multiple files from explorer context menu in a single instance.

  Read the article

• Sharepoint always down on the weekend?

  - by TheGambler

  For some reason, our sharepoint site always goes down on Saturday. It's the stangest thing and I can't figure out why. I'm a total noob at sharepoint and have been thrown into being the go to guy for sharepoint with my current employer. I've tried bouncing IIS on Fridays to see if there is anything I can do before hand. Is there anything that might be scheduled that I may not know about that would cause sharepoint to go down? Remember I'm a total noob as sharepoint. Thanks to all that reply. Edit: Also this our front-end and database instances are on virtual servers.

  Read the article

• Jenkins to not allow the same job to run concurrently on the same node?

  - by Marek Gimza

  I have 4 nodes and 2 jobs. Any node can run 2 jobs concurrently and any job can be executed concurrently. I want to be able to restrict running the same job concurrently on the same machine. For example: Jobs: J1 and J2 nodes: N1,N2,N3 and N4 I can run J1 and J2 on the same node at the same time. I can run J1 on N1 and N3 at the same time. BUT I do not want to run J1 and another build of J1 on the same node at the same time. I have tried "Locks and Latches", "Jenkins Exclusive Execution", "Exclusion Plugin" plugins, and these will work well when trying to coordinate different jobs. But my case is trying to manage different build-instances of the same job.

  Read the article

• Compilation failing - no #include - boost

  - by jwoolard

  Hi, I'm trying to compile a third-party library, but g++ is complaining about the following line: typedef boost::shared_ptr<MessageConsumer> MessageConsumerPtr; The strange thing is, there is no #include directive in the file - and it is clearly supposed to be this way; there are about 60 files with the same (or very similar) issues. Clearly if there was an #include directive referencing the relevant boost header this would compile cleanly. My question is: how can I get g++ to somehow automagically find the relevant symbol (in all instances of this issue, it is a namespace that can't be found - usually std:: or boost::) by either automatically processing the relevant header (or some other mechanism). Thanks. Edit My current g++ call looks like: g++ -fPIC -O3 -DUSING_PCH -D_REENTRANT -I/usr/include/boost -I./ -c MessageInterpreter.cpp -o MessageInterpreter.o

  Read the article

• Methods specific only to an instance? What are they called in Ruby?

  - by daremarkovic

  I know there are "instance methods", "class methods" but what are these types of methods called, for eg: s1 = "This is my STRING!" def s1.m1 downcase end p s1 # => "This is my STRING!" p s1.m1 # => "this is my string!" What type of method is the "m1" method called on the s1 "instance" of the "string" class? It's really weird because I didn't know this was possible at all if I try: s2 = "This is ANOTHER string" s2.m1 # => Won't work! Which kind of makes sense, but not sure why defining methods like m1 on instances on a class are useful at all.

  Read the article

• Ruby forwarding method calls

  - by JP

  I have an instance of a master class which generates instances of a subclass, these subclasses need to forward some method calls back to the master instance. At the moment I have code looking something like this, but it feels like I should be able to do the same thing more efficiently (maybe with method_missing?) class Master def initalize(mynum) @mynum = mynum end def one_thing(subinstance) "One thing with #{subinstance.var} from #{@mynum}" end def four_things(subinstance) "Four things with #{subinstance.var} from #{@mynum}" end def many_things(times,subinstance) "#{times} things with #{subinstance.var} from #{@mynum}" end def make_a_sub(uniqueness) Subthing.new(uniqueness,self) end class Subthing def initialize(uniqueness,master) @u = uniqueness @master = master end # Here I'm forwarding method calls def one_thing master.one_thing(self) end def four_things master.four_things(self) end def many_things(times) master.many_things(times,self) end end end m = Master.new(42) s = m.make_a_sub("very") s.one_thing === m.one_thing(s) s.many_things(8) === m.many_things(8,s) I hope you can see what's going on here. I would use method_missing, but I'm not sure how to cope with the possibility of some calls having arguments and some not (I can't really rearrange the order of the arguments to the Master methods either) Thanks for reading!

  Read the article

• Multidimensional Array To Mysql Codeigniter

  - by rochellecanale

  A little help how can I create an input query using this array? Or how can I pass it in the table? my table layout sample is this: sales_table id | product_name | price | qty | subtotal This is derived from the var_dump() function. Here is my code in array //array code from unserialized function $products = unserialize($this->session->userdata('product_list')); //This is the output. Array ( [2] => Array ( [id] => 2 [product_name] => NOKIA 5110 [product_desc] => Cellphone [product_price] => 500.00 [product_qty] => 1 [product_amount] => 500 [product_code] => NOKI2012-84353 ) [3] => Array ( [id] => 3 [product_name] => HP IPAQ RW6828 [product_desc] => Cellphone [product_price] => 1500.00 [product_qty] => 1 [product_amount] => 1500 [product_code] => HP I2012-08386 ) )

  Read the article

• Within SSIS - Is it possible to deploy one package multiple times in the same instance and set diffe

  - by Matt

  In my environment my Dev and QA Database Instances are on the same server. I would like to deploy the same package (or different versions of the package) into SSIS and set the filter to select different rows in the Config table. Is this possible? This is SQL 2005. For the sake of this question lets say I have one variable, which is a directory path. I would like to have these variables in the table twice (with different Filters applied (Dev and QA) as below (simplified) . . . Filter / Variable Value / Variable Name Dev / c:\data\dev / FilePath QA / c:\data\qa / FilePath Do I need to apply a change within the settings of the package in SSIS or is it changed on the job step within Agent? Any help would be appreciated.

  Read the article

• Loading multiple embedded flash apps onto an HTML page- problem with ordering

  - by shudson250

  We need to load an embedded version of a site written in Flash, and not originally designed to load multiple instances of itself, on a HTML page. The specific issue is how to get them to load in order when embedded, given that they are all being opened by the same instance of the flash player. It's a complicated mapping application, and at the moment, the maps and data get intermixed as the session variables are overwritten by another instance starting to load before the previous one has finished. We need a way to have them load sequentially, one finishing before another starts to load. The most we can specify in the URL is an &order=1 or similar. We have PHP and SQL on the backend. Edit: The embedded versions are being loaded in an iFrame of a parent site. One php file loads one swf, as many times as the parent site desires.

  Read the article

• Squid logs on mongodb

  - by user306241

  Hi, I'm planning to log my squid instances to a mongodb, but the actual problem is that we have a huge traffic to be logged, every access authenticated with user/pass. Eventually we have to make some reports based on logs. I was thinking to insert the logs distributed by months and by users, so my collection will look like this: {month: 'april', users: [{user: 'loop0', logs: [{timestamp: 12345678.9, url: 'http://stackoverflow.com/question/ask', ... }]}] So if I want to generate my reports based on the month of april I just have to get the right month instead of looking in zillions of lines to fetch the lines that timestamp match between April, 1 and April, 30. Of course this type of insert will be slower than just insert the log line directly. So my question is: is there a best way to do this? Nowadays we have around 12 million lines of log by day.

  Read the article

• How to cast/convert form Object in an byte[] array

  - by maddash

  I've got a maybe simple problem, but at the moment I am not able to solve it. I have an Object and I need to convert it into a byte[]. public byte[] GetMapiPropertyBytes(string propIdentifier) { return (byte[])this.GetMapiProperty(propIdentifier); //InvalidCastException } Exception: Unable to cast COM object of type 'System.__ComObject' to class type 'System.Byte[]'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface. So far so good - I've tried to serialize it, but I got another exception - NOT serializable Could someone help me? I need a method to convert it...

  Read the article

• Unrecognized libraries and functions

  - by John Smith

  I am working in Eclipse 3.7.2 on Ubuntu 12.04 with C++. I have read about a few instances where libraries were not being recognized and the majority said to update the Paths and Symbols but that hasn't fixed my issue. I have 2 projects open in my workspace, one of which is already a completed project that has implemented functions and libraries with no errors from Eclipse. However, when I try to implement some of the same functions or include the same libraries in the 2nd project Eclipse can't resolve them. For example, #include <string> #include <stdio.h> strstr(p, "<Project>"); The include statement will be accepted and stdio.h will be found but the strstr function is not resolved even though it works fine in the other project. Any ideas as to why this might be happening? Thanks.

  Read the article

• Programmatically Change Colors in C#

  - by Jason

  I am current working on a project where, as different users add text to a document, I would like the color of the text to change. Originally, I was using C#'s predefined color values and just putting the ones I wanted to use into an enum in my application and cycling through the colors as different users added annotations. This works fine, and I am okay with this solution. However, I also could have chosen to change the RGB values and derived colors that way. I'm curious about what type of algorithm would be good to change those values to get different sets of colors. This is more just an exercise of something I had thought about. To clarify a little bit, I don't want to just increment one of the color values (R, G, or B) because that wouldn't give me enough variety in my colors. But, I don't think it would also work to increment all three of equal amounts. I also have to watch out for repeating colors (up to a point). The requirements for my project anticipates, at most, 10 different reviewers.

  Read the article

• Get all text between tags with preg_match_all() or better function?

  - by kylex

  2010-June-11 <remove>2010-June-2</remove> <remove>2010-June-3</remove> 2010-June-15 2010-June-16 2010-June-17 2010-June-3 2010-June-2 2010-June-1 I'm trying to find all instances that are between the <remove> tags This is what I have: $pattern = "/<remove>(.*?)<\/remove>/"; preg_match_all($pattern, $_POST['exclude'], $matches); foreach($matches as $deselect){ foreach ($deselect as $display){ echo $display."<br />"; } } This is what it returns: 2010-June-2 2010-June-3 2010-June-2 2010-June-3 Why is it doubling up, and how do I prevent that?

  Read the article

• OneToMany association updates instead of insert

  - by Shvalb

  I have an entity with one-to-many association to child entity. The child entity has 2 columns as PK and one of the column is FK to the parent table. mapping looks like this: @OneToMany(cascade = {CascadeType.ALL}, fetch = FetchType.EAGER ) @JoinColumn(name="USER_RESULT_SEQUENCES.USER_RESULT_ID", referencedColumnName="USER_RESULT_ID", unique=true, insertable=true, updatable=false) private List<UserResultSequence> sequences; I create an instance of parent and add children instances to list and then try to save it to DB. If child table is empty it inserts all children and it works perfectly. if the child table is not empty it updates existing rows! I don't know why it updates instead of inserts, any ideas why this might happen?? Thank you!

  Read the article

• flex accessing children of a list component

  - by pfunc

  when I try to loop through the children of a List component that has buttons in it, I can't seem to access those children. I try for(var btnNum:Number = 0; btnNum < myList.numChildren; btnNum++) { trace(myList.getChildAt(btnNum); } but it is giving some other instance, not the button instances. and the weeklist <mx:List id="myList" dataProvider="{_data.mappoints.week.@number}" > <mx:itemRenderer > <mx:Component> <mx:Button buttonMode="true" toggle="true" alpha="1" width="116" height="35" label="WEEK {data}" > </mx:Button> </mx:Component> </mx:itemRenderer> </mx:List>

  Read the article

• Serialization of a TChan String

  - by J Fritsch

  I have declared the following type KEY = (IPv4, Integer) type TPSQ = TVar (PSQ.PSQ KEY POSIXTime) type TMap = TVar (Map.Map KEY [String]) data Qcfg = Qcfg { qthresh :: Int, tdelay :: Rational, cwpsq :: TPSQ, cwmap :: TMap, cw chan :: TChan String } deriving (Show) and would like this to be serializable in a sense that Qcfg can either be written to disk or be sent over the network. When I compile this I get the error No instances for (Show TMap, Show TPSQ, Show (TChan String)) arising from the 'deriving' clause of a data type declaration Possible fix: add instance declarations for (Show TMap, Show TPSQ, Show (TChan String)) or use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (Show Qcfg) I am now not quite sure whether there is a chance at all to serialize my TChan although all individual nodes in it are members of the show class. For TMap and TPSQ I wonder whether there are ways to show the values in the TVar directly (because it does not get changed, so there should no need to lock it) without having to declare an instance that does a readTVar ?

  Read the article

• Should I use polymorphic association, just a has_one, or attribute in this case?

  - by Angela

  I have three Models: Contact_Email, Contact_Letter, and Contact_Call. These represent the unique pairing of a Contact with a template for each of the three. For all of these, I want to record at least a status and date for the status. For example, "declined" on 5/10/10 or "responded" on 5/10/10 or something like that. I may in the future want to extend that. I later do want to be able to see all the instances that have the same status, such as "responded" or "meeting requested." What is the best way to do this? To make the three Contacts statusable and create a polymorphic association on a model called Status. Or just each Object of Contact_Email has_one Status?

  Read the article

• Elegant ways to print out a bunch of instance attributes in python 2.6?

  - by wds

  First some background. I'm parsing a simple file format, and wish to re-use the results in python code later, so I made a very simple class hierarchy and wrote the parser to construct objects from the original records in the text files I'm working from. At the same time I'd like to load the data into a legacy database, the loader files for which take a simple tab-separated format. The most straightforward way would be to just do something like: print "%s\t%s\t....".format(record.id, record.attr1, len(record.attr1), ...) Because there are so many columns to print out though, I thought I'd use the Template class to make it a bit easier to see what's what, i.e.: templ = Template("$id\t$attr1\t$attr1_len\t...") And I figured I could just use the record in place of the map used by a substitute call, with some additional keywords for derived values: print templ.substitute(record, attr1_len=len(record.attr1), ...) Unfortunately this fails, complaining that the record instance does not have an attribute __getitem__. So my question is twofold: do I need to implement __getitem__ and if so how? is there a more elegant way for something like this where you just need to output a bunch of attributes you already know the name for?

  Read the article

• Synchronization between user space process and interupt context code

  - by user1748950

  Recently I attended couple of interviews. Out of all kernel questions which were asked, thr is one specific question which I couldnt find convincing answer of. How will you use different synchronization techniques while sharing data between user space process and interrupt context function? My convincing answer was: In interrupt context code: 1. do *spin_lock_irqsave* 2. access data buffer which is shared between user space app and kernel 3. do *spin_lock_irqrestore* Then this was not convincing answer. Do I have to do irqsave and irqrestore in all the instances of data access? Regards, Yogi

  Read the article

• Network license control for a Java application

  - by user1461615

  I have been tasked with providing some form of network license control for a Java application. The app would be stored on a network drive and run from a client machine. The basic idea is that it will be able to work out how many times it is being run concurrently and prevent the N+1th user from running the software where N is the number of concurrent licenses the customer has purchased. Is this possible somehow with a Java application? I implemented a "solution" which relied on multi-cast UDP communication between the running instances of the application but this didn't work because on most networks this kind of communication is blocked by security measures. Is there a better way? I don't even mind if it requires JNI/JNA. N.B. The solution does not have to be that sophisticated or highly secure.

  Read the article

• Optimal strategy to make a C++ hash table, thread safe

  - by Ajeet

  (I am interested in design of implementation NOT a readymade construct that will do it all.) Suppose we have a class HashTable (not hash-map implemented as a tree but hash-table) and say there are eight threads. Suppose read to write ratio is about 100:1 or even better 1000:1. Case A) Only one thread is a writer and others including writer can read from HashTable(they may simply iterate over entire hash table) Case B) All threads are identical and all could read/write. Can someone suggest best strategy to make the class thread safe with following consideration 1. Top priority to least lock contention 2. Second priority to least number of locks My understanding so far is thus : One BIG reader-writer lock(semaphore). Specialize the semaphore so that there could be eight instances writer-resource for case B, where each each writer resource locks one row(or range for that matter). (so i guess 1+8 mutexes) Please let me know if I am thinking on the correct line, and how could we improve on this solution.

  Read the article

• How do virtual destructors work?

  - by Jack

  I am using gcc. I am aware how the virtual destructors solve the problem when we destroy a derived class object pointed by a base class pointer. I want to know how do they work? class A { public: A(){cout<<"A constructor"<<endl;} ~A(){cout<<"A destructor"<<endl;} }; class B:public A { public: B(){cout<<"B constructor"<<endl;} ~B(){cout<<"B destructor"<<endl;} }; int main() { A * a = new B(); delete a; getch(); return 0; } When I change A's destructor to a virtual function, the problem is solved. What is the inner working for this. Why do I make A's destructor virtual.

  Read the article

< Previous Page | 140 141 142 143 144 145 146 147 148 149 150 151  | Next Page >