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  • Getting the download count of a specific S3 object

    - by phidah
    I've got a number of S3 objects that are available to my customers. Since I'd like to bill my customers by usage, I wondered if there is any smart kind of way to get the number of times a given file has been downloaded? Alternatively, I suppose I could parse the log files provided by S3, but with 10m+ fetches per customer this might be bit of a task. Any ideas?

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  • Fastest possible summing numbers up to N

    - by dada
    Okay so i need really FAST algorithm or code in C if you have any it would be nice. The task is to sum all numbers from 1 to N for a given number N (it can be negative number too), so i did the usual way (you know just summing with loop from 1 to N) but it's not fast enough - i need something faster, i guess that i need the fastest possible way to do this. If anyone could help me, please do. Thanks.

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  • What's the best way to identify subdomains by PHP dynamically?

    - by kavoir.com
    I have configured the wildcard DNS of *.mydomain.com and it's all working properly. My question is which of these should I rely on identifying client subdomain requests? $_SERVER["HTTP_HOST"] $_SERVER["SERVER_NAME"] $_SERVER["SCRIPT_URI"] They all seem to contain the subdomain part I want but after reading this article by Chris: http://shiflett.org/blog/2005/feb/more-on-filtering-input-and-escaping-output, I'm lost at see and there appears to be no safe way to do this? Any idea on accomplishing this task securely?

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  • Implementing the procducer-consumer pattern with .NET 4.0

    - by bitbonk
    With alle the new paralell programming features in .NET 4.0, what would be a a simple and fast way to implement the producer-consumer pattern (where at least one thread is producing/enqueuing task items and another thread executes/dequeues these tasks). Can we benfit from all these new APIs? What is your preferred implementation of this pattern?

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  • bash script code help to make zip/tar of several folders .

    - by Arsheep
    I am very new in bash and never coded in before but this task is stuck so need to get rid of it . I need to make bash script to make a single compressed file with several dirs. Like - /home/code/bots/ /var/config/ . . . /var/system/ and all will be compressed to single file /var/file/bkup.[zip][tar.gz] Thanks in advance

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  • apache solr : sum of data resulted from group by

    - by Terance Dias
    Hi, We have a requirement where we need to group our records by a particular field and take the sum of a corresponding numeric field e.x. select userid, sum(click_count) from user_action group by userid; We are trying to do this using apache solr and found that there were 2 ways of doing this: Using the field collapsing feature (http://blog.jteam.nl/2009/10/20/result-grouping-field-collapsing-with-solr/) but found 2 problems with this: 1.1. This is not part of release and is available as patch so we are not sure if we can use this in production. 1.2. We do not get the sum back but individual counts and we need to sum it at the client side. Using the Stats Component along with faceted search (http://wiki.apache.org/solr/StatsComponent). This meets our requirement but it is not fast enough for very large data sets. I just wanted to know if anybody knows of any other way to achieve this. Appreciate any help. Thanks, Terance.

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  • Running OpenMPI on Windows XP

    - by iamweird
    Hi there. I'm trying to build a simple cluster based on Windows XP. I compiled OpenMPI-1.4.2 successfully, and tools like mpicc and ompi_info work too, but I can't get my mpirun working properly. The only output I can see is Z:\orterun --hostfile z:\hosts.txt -np 2 hostname [host0:04728] Failed to initialize COM library. Error code = -2147417850 [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\openmpi-1.4.2 \orte\mca\ess\hnp\ess_hnp_module.c at line 218 -------------------------------------------------------------------------- It looks like orte_init failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during orte_init; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): orte_plm_init failed -- Returned value Error (-1) instead of ORTE_SUCCESS -------------------------------------------------------------------------- [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\openmpi-1.4.2 \orte\runtime\orte_init.c at line 132 -------------------------------------------------------------------------- It looks like orte_init failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during orte_init; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): orte_ess_set_name failed -- Returned value Error (-1) instead of ORTE_SUCCESS -------------------------------------------------------------------------- [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\..\..\openmpi -1.4.2\orte\tools\orterun\orterun.c at line 543 Where z:\hosts.txt appears as follows: host0 host1 Z: is a shared network drive available to both host0 and host1. What my problem is and how do I fix it? Upd: Ok, this problem seems to be fixed. It seems to me that WideCap driver and/or software components causes this error to appear. A "clean" machine runs local task successfully. Anyway, I still cannot run a task within at least 2 machines, I'm getting following message: Z:\mpirun --hostfile z:\hosts.txt -np 2 hostname connecting to host1 username:cluster password:******** Save Credential?(Y/N) y [host0:04728] This feature hasn't been implemented yet. [host0:04728] Could not connect to namespace cimv2 on node host1. Error code =-2147024891 -------------------------------------------------------------------------- mpirun was unable to start the specified application as it encountered an error. More information may be available above. -------------------------------------------------------------------------- I googled a little and did all the things as described here: http://www.open-mpi.org/community/lists/users/2010/03/12355.php but I'm still getting the same error. Can anyone help me? Upd2: Error code -2147024891 might be WMI error WBEM_E_INVALID_PARAMETER (0x80041008) which occures when one of the parameters passed to the WMI call is not correct. Does this mean that the problem is in OpenMPI source code itself? Or maybe it's because of wrong/outdated wincred.h and credui.lib I used while building OpenMPI from the source code?

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  • Undo/Redo using Memento: Stack, Queue or just LinkedList?

    - by serhio
    What is the best having when implementing Memento pattern (for Undo/Redo) in witch collection to Keep Mementos? Basically, I need this(c = change, u = undo, r = redo): 0 *c -1 0 *c -2 -1 0 *c -3 -2 -1 0 <u -2 -1 0 1 *c -3 -2 -1 0 Variants: LinkedList - possible in principle, maybe not optimized. Queue - not adapted for this task, IMO. Stack - not adapted for undo AND redo; Double Stack - maybe optimal, but can't control the undo maximum size.

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  • Summing Row in SQL query for time range

    - by user3703334
    I'm trying to group a large amount of data into smaller bundles. Currently the code for my query is as follows SELECT [DateTime] ,[KW] FROM [POWER] WHERE datetime >= '2014-04-14 06:00:00' and datetime < '2014-04-21 06:00:00' ORDER BY datetime which gives me DateTime KW 4/14/2014 6:00:02.0 1947 4/14/2014 6:00:15.0 1946 4/14/2014 6:00:23.0 1947 4/14/2014 6:00:32.0 1011 4/14/2014 6:00:43.0 601 4/14/2014 6:00:52.0 585 4/14/2014 6:01:02.0 582 4/14/2014 6:01:12.0 580 4/14/2014 6:01:21.0 579 4/14/2014 6:01:32.0 579 4/14/2014 6:01:44.0 578 4/14/2014 6:01:53.0 578 4/14/2014 6:02:01.0 577 4/14/2014 6:02:12.0 577 4/14/2014 6:02:22.0 577 4/14/2014 6:02:32.0 576 4/14/2014 6:02:42.0 578 4/14/2014 6:02:52.0 577 4/14/2014 6:03:02.0 577 4/14/2014 6:03:12.0 577 4/14/2014 6:03:22.0 578 . . . . 4/21/2014 5:59:55.0 11 Now there is a reading every 10 seconds from a substation. Now I want to group this data into hourly readings. Thus 00:00-01:00 = sum([KW]] for where datetime >= '^date^ 00:00:00' and datetime < '^date^ 01:00:00' I've tried using a convert to change the datetime into date and time field and then only to add all the time fields together with no success. Can someone please assist me, I'm not sure what is right way of doing this. Thanks ADDED Ok so the spilt between Datetime is working nicely, but as if I add a SUM([KW]) function SQL gives an error. And if I include any of the group functions it also nags. Below is what works, I still need to sum the KW per the grouping of hours. I've tried using Group By Hour and Group by DATEPART(Hour,[DateTime]) Both didn't work. SELECT DATEPART(Hour,[DateTime]) Hour ,DATEPART(Day,[DateTime]) Day ,DATEPART(Month,[DateTime]) Month ,([KVAReal]) ,([KVAr]) ,([KW]) FROM [POWER].[dbo].[IT10t_PAC3200] WHERE datetime >= '2014-04-14 06:00:00' and datetime < '2014-04-21 06:00:00' order by datetime

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  • MooTools event listener disappears after element.innerHTML is changed

    - by acoder
    Hi everyone, I am trying to achieve this task using MooTools. Description: I attached an event listener to "myButton" link. A click on this link initiates an AJAX request and updates "myDiv" content based on the response text. During this request a POST variable is being sent to "button.php", but it's not used at the moment.. (i wish to use it later) OK, as a result, "myDiv" gets exactly the same link with the same ID (myButton) + a random number, so that we could see that each click generates a new number. The problem: After the first click on "myButton", "myDiv" updates correctly, showing a random number. When I click "myButton" for the second time (this time in newly updated div), the div does not refresh anymore. Please note that I need "myButton" to be inside "myDiv", and "myDiv" must be updated (refreshed) after each click without having to refresh the entire page. Can somebody show me how to achieve this task based on this simplified code example? index.html <html> <head> <script type="text/javascript" src="mootools-1.2.4-core-nc.js"></script> <script> window.addEvent('domready', function() { $('myButton').addEvent('click', function(e) { e.stop(); var myRequest = new Request({ method: 'post', url: 'button.php', data: { action : 'test' }, onRequest: function() { $('myDiv').innerHTML = '<img src="images/loading.gif" />'; }, onComplete: function(response) { $('myDiv').innerHTML = response; } }); myRequest.send(); $('myButton').removeEvent('click'); }); }); </script> </head> <body> <div id="myDiv"> <a id="myButton" href="#">Button</a> </div> </body> </html> button.php <a id="myButton" href="#">Button</a> clicked <?php echo rand(1,100); ?>

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  • How can I bring an activity to the front from a background service

    - by Erwan Pinault
    Hi, First of all, I am aware my issue is against the philosophy of Android, but I have no choice, this application will run on a embedded car gps and I need to bring an activity to prevent from car accident, for example, when it's happen around the user. I have to put other activity on the back and bring my alert pop up without user manipulation like notification on the front. Is there a way to bring manually an activity to the front, by resuming it like when you click on the android task switcher?

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  • How can I tell if the screen is on in android?

    - by user297020
    In Android 2.2 (Level 7) the function PowerManager.IsScreenOn() returns a boolean that is true if the screen is turned on and false if the screen is turned off. I am developing code for Android 1.5 (Level 3). How do I accomplish the same task in older versions of Android? I do not want to turn the screen on or off in my code. I just want to know what it is.

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  • where can I find the rake tasks delivered with rails

    - by ash34
    I am looking for tasks like tmp:clear or db:migrate. Where can I find the code for these tasks. I remember seeing them before but don't recollect where. Also, is there a way I can set some global variables in a .rake file that can be accessed by all tasks in that file without passing them as arguments to each task. thanks, ash

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  • C#: returns array from object.

    - by jitm
    Hello, There is the next task: I need to check if input parameter (object) is array, then return array of input elements. For example I have input array like this: int [] array = {1,2,3,4}; And method private object[] GetArray(object @from) { } So, I need to check in this method that input variable is array and after return this array. For checking I use if(@from.GetType().IsArray) And how to create array from object ??? Is it possible ? Thanks.

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  • [Flex] Caching canvas into ByteArray

    - by Eugene
    Task: (all in code, not visual) create a canvas, place into it some labels and draw some lines, then cache it as byteArray. The problem is that if I cache an object that is already drawed on the screen, it works great, but if I cache a canvas, that have been created few lines earlier, this results white image. Is there any solution to cache a display object, that was created in code, but not intended to be displayed at all?

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  • SQL Latest photos from contacts (grouped by contact)

    - by kitsched
    Hello, To short version of this question is that I want to accomplish something along the lines of what's visible on Flickr's homepage once you're logged in. It shows the three latest photos of each of your friends sorted by date but grouped by friend. Here's a longer explanation: For example I have 3 friends: John, George and Andrea. The list I want to extract should look like this: George Photo - 2010-05-18 Photo - 2010-05-18 Photo - 2010-05-12 John Photo - 2010-05-17 Photo - 2010-05-14 Photo - 2010-05-12 Andrea Photo - 2010-05-15 Photo - 2010-05-15 Photo - 2010-05-15 Friend with most recent photo uploaded is on top but his or her 2 next files follow. I'd like to do this from MySQL, and for the time being I got here: SELECT photos.user_id, photos.id, photos.date_uploaded FROM photos WHERE photos.user_id IN (SELECT user2_id FROM user_relations WHERE user1_id = 8) ORDER BY date_uploaded DESC Where user1_id = 8 is the currently logged in user and user2_id are the ids of friends. This query indeed returns the latest files uploaded by the contacts of the user with id = 8 sorted by date. However I'd like to accomplish the grouping and limiting mentioned above. Hopefully this makes sense. Thank you in advance.

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  • [Android] any integer return when user read the sms

    - by dhaiwat
    Hi i want to do some activity on sms after user read it, so how can my background service in android know that particular sms is now read(when my service start work) to react for some task. is there system generate any integer when user read sms. if it generate than how will i get? if anyone have any idea than share it.

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  • Use of ebay API

    - by Hab
    I am given a task to R& D ebay api. As i have tried to explore on net i still have no clear idea that how and why to use it in my apps. Also are there many ebay api's for different purposes? Any sample code available using this api in objective c for iPhone. Any doc available providing general info about it.

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  • Is it possible in Perl to require a subroutine call is made?

    - by MitchelWB
    I don't know enough about Perl to even know what I'm asking for exactly, but I'm writing a series of subroutines to be available for many individual scripts that all process different incoming flat files. The process is far from perfect, but it's what I've got to deal with and I'm trying to build myself a small library of subs that make it easier for me to manage it all. Each script handles a different incoming flat file with it's own formatting, sorting, grouping and outputting requirements. One common aspect is that we have small text files that house counters that are used to name the output files so that we have no duplicate file names. Because the processing of the data is different for each file, I need to open the file to get my counter value, because this is a common operation, I'd like to put it in a sub to retrieve the counter. But then need to write specific code to process the data. And would like a second sub that allows me to update the counter with the counter once I've processed the data. Is there a way to make the second sub call a requirement if the first one is called? Ideally if it could even be an error that would prevent the script from running at all much like a syntax error. EDIT: Here is a little [ugly and simplified] psuedo-code to give a better feel for what the current process is: require "importLibrary.plx"; #open data source file open DataIn, $filename; #call getCounterInfo from importLibrary.plx to get the counter value from counter file $counter = &getCounterInfo($counterFileName); while (<DataIn>) { #Process data based on unique formatting and requirements #output to task files based on requirements and name files using the $counter #increment $counter } #update counter file with new value of $counter &updateCounterInfo($counter);

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  • Is it possible to generate a XSL-FO template from a PDF?

    - by Vihung
    Given a PDF document, is it possible to generate a XSL-FO (FOP) template? Obviously, this would be a one-time thing - the generated template would just be a starting point for creating a proper template that pulls in the appropriate data. For me, the ideal tool for doing so would be a Java-based one and should be executable from the command line or through an ANT task. Failing that, it would be something that runs on Linux and MacOS X.

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  • Killing a process that keeps respawning

    - by terabytest
    I got infected by a virus. It looks like I removed it, but it somehow injected a few more processes (I can see them in the task manager) that respawn when I kill them (somehow). Is there a way to destroy those process to stop them from respawning, or in the case something else is respawning them, to kill that "something"?

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  • Does anybody know of an Atom APP server for .Net?

    - by ianmayo
    Hi all, I'm aware of the Argotic framework for .Net that assists in the collation and management of Atom data, but does anybody know of a .Net application/framework that implements the Atom Publishing Protocol (APP)? Creating a .Net APP server from scratch seems a daunting task, even if it 'stands on the shoulders' of Argotic. Maybe a .Net rewrite of Apache Abdera (or other O/S implementation) would be easier. I welcome your thoughts, Ian

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