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  • how to query sqlite for certain rows, i.e. dividing it into pages (perl DBI)

    - by user1380641
    sorry for my noob question, I'm currently writing a perl web application with sqlite database behind it. I would like to be able to show in my app query results which might get thousands of rows - these should be split in pages - routing should be like /webapp/N - where N is the page number. what is the correct way to query the sqlite db using DBI, in order to fetch only the relavent rows. for instance, if I show 25 rows per page so I want to query the db for 1-25 rows in the first page, 26-50 in the second page etc.... Thanks in advanced!

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  • Guidance on using drop in DLLs

    - by Scott Chamberlain
    I have been giving the task to rewrite a internal utility in .net for my work. One of program requirements the new system has is have a dll that implements a set of interfaces and have the program call the DLL. Now this dll will be changed out a lot per deployment. My question is what is the best way to do it from a development standpoint? Do I add a template DLL (one that only has the interfaces but no implementation) to the project references like I would do any other dll that I would use. Or do I need to use somthing like this every time I want to use code from the dll? var DropIn = System.Reflection.Assembly.LoadFrom("DropInDll.dll"); var getActions = DropIn.GetType("Main").GetMethod("GetActions"); List<IAction> ActionList = (List<IAction>)getActions.Invoke(null, null);

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  • Guidance for Php for a beginner

    - by luckyluke
    I've just started to learn PHP. I found the $_POST variable is not working and posted the same at the below link $_POST[] not working in php and as per the advise i installed XAMPP. But still the proble of $_POST variable is not solved. Now i've a doubt whether i need to configure any global variable to make $_POST work. I'm totally lost on this and dont know how to proceed. Any help on this is verryy much appreciated. Thanks.

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  • Reboot windows machines at a certain time of day and automatically login with Python

    - by Tom
    I know how to reboot machines remotely, so that's the easy part. However, the complexity of the issue is trying to setup the following. I'd like to control machines on a network for after-hours use such that when users logoff and go home, or shutdown their computers, whatever, python or some combination of python + windows could restart their machines (for cleanliness) and automatically login, running a process for the night, then in the morning, stop said process and restart the machine so the user could easily login like normal. I've looked around, haven't had too terribly much luck, though it looks like one could do it with a changing of the registry. That sounds like a rough idea though, modifying the registry on a per-day basis. Is there an easier way?

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  • discrepancy in google analytics pageview totals when tracking subdomains

    - by frabjousB
    We are using the old urchin.js and are tracking 2 subdomains under the same profile. We have a “track subdomains” advanced filter defined (as per http://www.google.com/support/googleanalytics/bin/answer.py?hl=en&answer=55524) as well as 2 segments for presenting data in the reports: hostname matches exactly subdomain1.domain-name.com and hostname matches exactly subdomain2.domain-name.com When I apply these segments to our Top Content Overview report, the All Visits total for PageViews does not correspond to the # of visits reported for each subdomain. For example: All Visits = 53 subdomain1 = 24 subdomain2 = 32 Is there any reason as to why we would be seeing this discrepancy in numbers?

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  • Can hash tables really be O(1)

    - by drawnonward
    It seems to be common knowledge that hash tables can achieve O(1) but that has never made sense to me. Can someone please explain it? A. The value is an int smaller than the size of the hash table, so the value is its own hash, so there is no hash table but if there was it would be O(1) and still be inefficient. B. You have to calculate the hash, so the order is O(n) for the size of the data being looked up. The lookup might be O(1) after you do O(n) work, but that still comes out to O(n) in my eyes. And unless you have a perfect hash or a large hash table there are probably several items per bucket so it devolves into a small linear search at some point anyway. I think hash tables are awesome, but I do not get the O(1) designation unless it is just supposed to be theoretical.

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  • Storing acceleration values in Objective-C/Cocoa?

    - by ASchlaep
    Hi all, I'm writing for the iPhone and I'm trying to measure the time between maximum accelerations. Imagine you've attached your iPhone to an oscillating spring. What I want to do is measure the frequency of the oscillation. The way I am going about doing this is storing a certain number acceleration values (updated 20 times per second) in an NSMutableArray and comparing the current acceleration value with previous acceleration values. How do I add each updated acceleration value to the NSMutableArray and at the same time delete values from the back of the array as I don't need them any more? Thanks in advance!

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  • set label text to total row count of gridview

    - by woolardz
    I'm using a stored procedure in a sql database as the data source for a SqlDataSourceControl on my .aspx page. I'm then using the SqlDataSourceControl as the data source for a gridview on my page. Paging is set to true on the gridview. What i would like to do is set the text of a label to the total number of rows in the gridview. I can use this code 'labelRowCount.Text = GridView2.Rows.Count & " layers found" to return the number of results per page, but it doesn't give me the total. I've looked in several places and haven't been successful in finding a solution.

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  • g++ library search failure

    - by Frederick
    I have a directory structure as below: / | +--- /lib | libsomething.a | libsomething.so | +----/obj anObjFile.o When I run the following command from within the obj directory: g++ -L../lib -lsomething anObjFile.o I get undefined reference errors. Apparently gcc is failing to locate libsomething.a. But now if I delete libsomething.so and then rerun the command, linking succeeds. As per gcc documentation -lsomething should expand to libsomething.a. Then why is presence of libsomething.so causing the library search to fail? Also, how can I resolve this problem? I'm on Linux Mint 12 with gcc version 4.6.1.

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  • Best use of Jquery sliders and PHP

    - by Coronier
    Hello there, I have two questions: What's the best way to send sliders' values to a PHP page ? I'm associating each slider (several per page) with an hidden form so far, but I wonder if there's a "cleaner" way to do this. Related to the 1st question; I've some trouble with the script: var score = $(this).slider( "option", "value" ); $(this).closest("input[type=='hidden']").val(score); It doesn't set the value of the hidden input. Can somebody tells me what's wrong ? Thanks

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  • SQL to get rows (not groups) that match an aggregate

    - by xulochavez
    Given table USER (name, city, age), what's the best way to get the user details of oldest user per city? I have seen the following example SQL used in Oracle which I think it works select name, city, age from USER, (select city as maxCity, max(age) as maxAge from USER group by city) where city=maxCity and age=maxAge So in essence: use a nested query to select the grouping key and aggregate for it, then use it as another table in the main query and join with the grouping key and the aggregate value for each key. Is this the standard SQL way of doing it? Is it any quicker than using a temporary table, or is in fact using a temporary table interanlly anyway?

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  • Can I play any Buffer only once at a given time?

    - by mystify
    From the OpenAL documentation: The basic OpenAL objects are a Listener, a Source, and a Buffer. There can be a large number of Buffers, which contain audio data. Each buffer can be attached to one or more Sources My problem is, that I have one sound file which I need to play multiple times per second, at the same time. The sound is 2 seconds long. So it will overlap. Would I need multiple filled buffers for this (= multiple times that sound in memory)? If I would attach one Buffer to multiple Sources, would I be able to play the sound 10 times, overlapping itself, with just one copy in memory? Or would I still have to deal with 10 copies of that sound in memory?

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  • Physical storage of data in Access 2007

    - by ste
    I've been trying to estimate the size of an Access table with a certain number of records. It has 4 Longs (4 bytes each), and a Currency (8 bytes). In theory: 1 Record = 24 bytes, 500,000 = ~11.5MB However, the accdb file (even after compacting) increases by almost 30MB (~61 bytes per record). A few extra bytes for padding wouldn't be so bad, but 2.5X seems a bit excessive - even for Microsoft bloat. What's with the discrepancy? The four longs are compound keys, would that matter?

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  • How to increase thread-pool threads on IIS 7.0

    - by Xaqron
    Environment: Windows Server 2008 Enterprise, IIS 7.0, ASP.NET 2.0 (CLR), .NET 4.0 I have an ASP.NET application with no page and no session(HttpHandler). It a streaming server. I use two threads for processing each request so if there are 100 connected clients, then 200 threads are used. This is a dedicated server and there's no more application on the server. The problem is after 200 clients are connected (under stress testing) application refuses new clients, but if I increase the worker threads of application pool (create a web garden) then I can have 200 new happy clients per w3wp process. I feel .NET thread pool limit reaches at that point and need to increase it. Thanks

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  • Not able to run my first program on anroid tablet

    - by misguided
    I am not able to run on my android tablet. I have been following the Android training link It says To run the app from Eclipse: Open one of your project's files and click Run from the toolbar. In the Run as window that appears, select Android Application and click OK. But when I do the same , I do not see anything on my Mototola xoom Tablet. I have checke dthe following link for Setting up USB drivers.As per the link , I have confirmed that device is connected When plugged in over USB, you can verify that your device is connected by executing adb devices from your SDK platform-tools/ directory. If connected, you'll see the device name listed as a "device." C:\Android\sdk\platform-tools>adb devices List of devices attached 0380610842bf5157 device Can anyone please advise where I am going wrong. What should I do to make my eclipse code run on android tablet.

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  • Working with sets of rows in (My)SQL and comparing values

    - by Pep.
    Hello, I am trying to figure out the SQL for doing some relatively simple operations on sets of records in a table but I am stuck. Consider a table with multiple rows per item, all identified by a common key. For example: serial model color XX1 A blue XX2 A blue XX3 A green XX5 B red XX6 B blue XX1 B blue What I would for example want to do is: Assuming that all model A rows must have the same color, find the rows which dont. (for example, XX3 is green). Assuming that a given serial number can only point to a single type of model, find out the rows which that does not occur (for example XX1 points both to A and B) These are all simple logically things to do. To abstract it, I want to know how to group things by using a single key (or combination of keys) and then compare the values of those records. Should I use a join on the same table? should i use some sort of array or similar? thanks for your help

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  • return only one document for each filter defined in the query

    - by Garytxo
    Hi all, In one of my latest projects I use Solr 1.4 for searching products.However I have ran into a slight problem, which I aint sure if its possible to do using Solr. All products are indexed by "country" and "category" and the "id", "class" and "description" are stored values. I now have been requested to extract a sample list of products that we have for a give "category" and "ONLY RETURNING ONE" product for each country where the product is available. In my current implementation, I have a dismax query to get a list of all the countries that correspond to the catergory, then I call again solr to extract all products for each country, limiting the no. rows by the size of the countries found in the previous query. The problem I have with this current implementation is I can not be certain that I have one product for each country in the list. Therefore would anyone know if it possible to tell solr that you want only one product per country provided in the query? Any guidance would be useful.

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  • Problems with sys.stdout.write() with time.sleep() in a function

    - by philipjkim
    What I wanted is printing out 5 dots that a dot printed per a second using time.sleep(), but the result was 5 dots were printed at once after 5 seconds delay. Tried both print and sys.stdout.write, same result. Thanks for any advices. import time import sys def wait_for(n): """Wait for {n} seconds. {n} should be an integer greater than 0.""" if not isinstance(n, int): print 'n in wait_for(n) should be an integer.' return elif n < 1: print 'n in wait_for(n) should be greater than 0.' return for i in range(0, n): sys.stdout.write('.') time.sleep(1) sys.stdout.write('\n') def main(): wait_for(5) # FIXME: doesn't work as expected if __name__ == '__main__': try: main() except KeyboardInterrupt: print '\nAborted.'

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  • Getting deadlocks in MySQL

    - by at
    We're very frustratingly getting deadlocks in MySQL. It isn't because of exceeding a lock timeout as the deadlocks happen instantly when they do happen. Here's the SQL code that is executing on 2 separate threads (with 2 separate connections from the connection pool) that produces a deadlock: UPDATE Sequences SET Counter = LAST_INSERT_ID(Counter + 1) WHERE Sequence IS NULL Sequences table has 2 columns: Sequence and Counter The LAST_INSERT_ID allows us to retrieve this updated counter value as per MySQL's recommendation. That works perfect for us, but we get these deadlocks! Why are we getting them and how can we avoid them?? Thanks so much for any help with this.

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  • How to break a jquery variable dynamically based on condition

    - by Adi
    I have a jquery variable which has is showing the value in the console as .. ["INCOMING", 0, "INETCALL", 0, "ISD", 31.8, "LOCAL", 197.92, "STD", 73.2] Now as per my need i have to break these values and make it like this ["INCOMING", 0],["INETCALL", 0],["ISD", 31.8],["LOCAL", 197.92],["STD", 73.2] but these values i need to make in the required formate dynamically as this is received from database. Here is my ajax call to get the values from server side.. var dbdata=""; $(document).ready(function() { $.ajax({ type: 'GET', url: 'getPieChartdata', async:false, dataType: "text", success: function(data) { dbdata=JSON.parse(data); } }); console.log(dbdata); }); Please guys help me . Thanks in advance..

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  • $_SERVER['HTTP_HOST'] not set

    - by yes123
    Hi guys, I am getting lot of traffic to my php pages but without the variable $_SERVER['HTTP_HOST'] setted. This traffic is like 1 hit per second. I don't know what it could be, but for reducing server load i am doing this at the top of every php pages: if (!isset($_SERVER['HTTP_HOST'])) exit; Do u know what could cause this? Is it safe to exit whenever http_host is not setted? Can a normal user visit my pages without setting http_host? PHP version: 5.2.0-8, Apache: 2.2.3 Thanks

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  • how do i detect \r\n in a u_char type of buffer?

    - by aDi Adam
    i am trying to construct http content from packet sniffing in C. right now i am able to save all the packets in a file but i want to get rid of the headers in the first packet. they are also being saved as per they are a part of tcp payload. the actual body after the header starts after double "crlf" or \r\n\r\n in http response. how do i detect \r\n so that i can only save the following part of the buffer in the file. the buffer is u_char type. i cant figure out the command or the part i looked on google and other places but i mostly find c# commands, nothing in C.

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  • How to detect if an element exists in Watir

    - by Rijksband
    Hi, I'm relatively new to Watir but can find no good documentation (examples) regarding how to check if an element exists. There are the API specs, of course, but these make precious little sense to me if I don't find an example. I've tried both combinations but nothing seems to work... if browser.image (:src "/media/images/icons/reviewertools/editreview.jpg").exists then... if browser.image (:src "/media/images/icons/reviewertools/editreview.jpg").exists? then... If anyone has a concrete suggestion as per how to implement this, please help! Thanks!

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  • Advanced Registry Monitoring

    - by RyanTimmons91
    I'm attempting to create a small utility to watch for the creation (or modification) of a specific registry key, and to kill the process responsible for causing that registry modification. I have had success in watching the changes to the registry via a class called 'RegistryMonitor', however it does not give you any information on what process initiated the registry call, through some googling I found that a library called 'EasyHook' should be able to do what I want, but all the documentation states that its designed for a per-application hook. The program itself is a temporary security patch, until our vendors come out with an official security update. As best I can tell there isn't a way to do exactly what I want to accomplish from C#, which is the only language I can comfortable write, test and execute software in. Any help on this would be appreciated I'm considering watching the registry changes via the program I already have, then if the change is discovered (the pc is already infected) running RKill and locking down the PC to prevent the issue from getting any worse

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  • help with stored procedure

    - by I__
    i am looking at this site: http://cloudexchange.cloudapp.net/stackoverflow/s/84/rising-stars-top-50-users-ordered-on-rep-per-day set nocount on DECLARE @endDate date SELECT @endDate = max(CreationDate) from Posts set nocount off SELECT TOP 50 Id AS [User Link], Reputation, Days, Reputation/Days AS RepPerDays FROM ( SELECT *, CONVERT(int, @endDate - CreationDate) as Days FROM Users ) AS UsersAugmented WHERE Reputation > 5000 ORDER BY RepPerDays DESC i am also a beginner at SQL. i have the following questions about this code: is this mysql or mssql? what does this do? set nocount off why is this in brackets? [User Link] what does this do? CONVERT(int, @endDate - CreationDate) as Days thanks!

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