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Search found 331 results on 14 pages for 'roger hart'.

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  • If we make a number every millisecond, how much data would we have in a day?

    - by Roger Travis
    I'm a bit confused here... I'm being offered to get into a project, where would be an array of certain sensors, that would give off reading every millisecond ( yes, 1000 reading in a second ). Reading would be a 3 or 4 digit number, for example like 818 or 1529. This reading need to be stored in a database on a server and accessed remotely. I never worked with such big amounts of data, what do you think, how much in terms of MBs reading from one sensor for a day would be?... 4(digits)x1000x60x60x24 ... = 345600000 bits ... right ? about 42 MB per day... doesn't seem too bad, right? therefor a DB of, say, 1 GB, would hold 23 days of info from 1 sensor, correct? I understand that MySQL & PHP probably would not be able to handle it... what would you suggest, maybe some aps? azure? oracle? ... Thansk!

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  • Are you using C++0x today? [closed]

    - by Roger Pate
    This is a question in two parts, the first is the most important and concerns now: Are you following the design and evolution of C++0x? What blogs, newsgroups, committee papers, and other resources do you follow? Even where you're not using any new features, how have they affected your current choices? What new features are you using now, either in production or otherwise? The second part is a follow-up, concerning the new standard once it is final: Do you expect to use it immediately? What are you doing to prepare for C++0x, other than as listed for the previous questions? Obviously, compiler support must be there, but there's still co-workers, ancillary tools, and other factors to consider. What will most affect your adoption? Edit: The original really was too argumentative; however, I'm still interested in the underlying question, so I've tried to clean it up and hopefully make it acceptable. This seems a much better avenue than duplicating—even though some answers responded to the argumentative tone, they still apply to the extent that they addressed the questions, and all answers are community property to be cleaned up as appropriate, too.

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  • os.fork() sem_wait: Permission denied

    - by Roger
    I am trying to compile python 2.5 on AIX 6.1, and the following occurs: Python 2.6.5 (r265:79063, Jun 3 2010, 11:43:45) [GCC 4.2.0] on aix6 Type "help", "copyright", "credits" or "license" for more information. >>> import os >>> os.fork() 0 sem_wait: Permission denied 741398 I have found this bug, which sounds similar: http://bugs.python.org/issue1234 which suggests setting HAVE_BROKEN_POSIX_SEMAPHORES I have tried this by modifying the configure script, and I can see it being set, but that does not help.. Any ideas ??

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  • getting a "default" concrete class that implements an interface

    - by Roger Joys
    I am implementing a custom (and generic) Json.net serializer and hit a bump in the road that I could use some help on. When the deserializer is mapping to a property that is an interface, how can I best determine what sort of object to construct to deserialize to to place into the interface property. I have the following: [JsonConverter(typeof(MyCustomSerializer<foo>))] class foo { int Int1 { get; set; } IList<string> StringList {get; set; } } My serializer properly serializes this object, and but when it comes back in, and I try to map the json parts to to object, I have a JArray and an interface. I am currently instantiating anything enumerable like List as theList = Activator.CreateInstance(property.PropertyType); This works create to work with in the deserialization process, but when the property is IList, I get runtime complaints (obviously) about not being able to instantiate an interface. So how would I know what type of concrete class to create in a case like this? Thank you

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  • CUDA - multiple kernels to compute a single value

    - by Roger
    Hey, I'm trying to write a kernel to essentially do the following in C float sum = 0.0; for(int i = 0; i < N; i++){ sum += valueArray[i]*valueArray[i]; } sum += sum / N; At the moment I have this inside my kernel, but it is not giving correct values. int i0 = blockIdx.x * blockDim.x + threadIdx.x; for(int i=i0; i<N; i += blockDim.x*gridDim.x){ *d_sum += d_valueArray[i]*d_valueArray[i]; } *d_sum= __fdividef(*d_sum, N); The code used to call the kernel is kernelName<<<64,128>>>(N, d_valueArray, d_sum); cudaMemcpy(&sum, d_sum, sizeof(float) , cudaMemcpyDeviceToHost); I think that each kernel is calculating a partial sum, but the final divide statement is not taking into account the accumulated value from each of the threads. Every kernel is producing it's own final value for d_sum? Does anyone know how could I go about doing this in an efficient way? Maybe using shared memory between threads? I'm very new to GPU programming. Cheers

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  • Updating or inserting high scores in SQL

    - by Roger Gilbrat
    I've been racking my brain over this for the past few days and I'm not sure it's possible, but figured I ask here. Is it possible for a single SQL statement to update a high score if your score is greater or insert it if your first score? My Score table has a UserID, Level and Score columns and I like it to follow the following logic: If your new score is greater than your last score for this Level, then replace it. If you don't have a score for this Level then add it. If your score for this Level is less than your highest score for this Level then do nothing. Is this possible in a single SQL statement or do I have to use two, one to see if you have a new high score and if so, replace it? Each UserID would have only one score in the table for each Level. I'm using MySQL.

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  • Free sounds for iPhone games.

    - by Roger Gilbrat
    I'm looking for a good source for sound effects for my iPhone game. I like SoundSnap, but they charge you for every sound you download, not just the ones you end up using. Sound design in games can be a very iterative process and I don't want to pay for 10 sounds I never use before finding the right one. freesound.org is another really good site, but they are all CC licensed and can't be used in commercial games. It's unclear if a free iPhone App is considered commercial (or if my final game will be free). Googling for this returns a huge number of pay sites with horrible web pages. I don't mind paying for sounds, but I want to pay for what I use. Any good personal recommendations?

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  • Wordpress Events List Date Problem

    - by Roger
    Hi, I'm having a problem displaying events in the correct order in wordpress. I think the problem is because wordpress is treating the date as a string and ordering it by the day because it's in british date format. The goal is to display a list of future events with the most current event at the top of the list. But I must use the british date format of dd/mm/yyyy. Do I need to go back to the drawing board or is there a way of converting the date to achieve the result I need? Thanks in advance :) <ul> <?php // Get today's date in the right format $todaysDate = date('d/m/Y');?> <?php query_posts('showposts=50&category_name=Training&meta_key=date&meta_compare=>=&meta_value=' . $todaysDate . '&orderby=meta_value&order=ASC'); ?> <?php if (have_posts()) : while (have_posts()) : the_post(); ?> <li> <h3><a href="<?php the_permalink(); ?>"> <?php the_title(); ?> </a></h3> <?php $getDate = get_post_meta($post->ID, 'date', TRUE); $dateArray = explode('/', $getDate); ?> <?php if($getDate != '') { ?> <div class="coursedate rounded"><?php echo date('d F Y', mktime(0, 0, 0, $dateArray[1], $dateArray[0], $dateArray[2])); ?></div> <?php } ?> <p><?php get_clean_excerpt(140, get_the_content()); ?>...</p> <p><strong><a class="link" href="<?php the_permalink(); ?>">For further details and booking click here</a></strong></p> </li> <?php endwhile; ?> <?php else : ?> <li>Sorry, no upcoming events!</li> <?php endif; ?>

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  • Sort array by two specifics values in PHP

    - by Roger
    The folks have already showed me how to sort an array by a specific value using usort and a fallback function in PHP. What if this specifc value doesn't exist and we have to use two values? in the example bellow the values [4] and [5]... In other words, I want to do this: order all objects numericaly by the fith value of each object from the highest to the lowest, and addicionally, for those objects that have the fifht value is empty (in the examplem '-'), order them by the fourth value. Array( [0] => Array( [0] => links-patrocinados [1] => adwords [2] => 0,5 [3] => R$92,34 [4] => 823000 [5] => 49500 ) [1] => Array( [0] => adwords [1] => google adwords como funciona [2] => 0,38 [3] => R$0,20 [4] => 480 [5] => 480 ) [2] => Array( [0] => links-patrocinados [1] => adword [2] => 0,39 [3] => R$58,77 [4] => 49500 [5] => 2900 ) [3] => Array( [0] => agencia [1] => agencias viagens espanholas [2] => - [3] => R$0,20 [4] => 58 [5] => - ) [4] => Array( [0] => agencia [1] => era agencia imobiliaria [2] => - [3] => R$0,20 [4] => 73 [5] => - ) )

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  • iPhone - a question about @property

    - by Roger
    Hi, I am kind of newbie on Objective-C and I was looking at a code, trying to understand a few things, and I come across with this .h file: there was a declaration like that on the @interface section MyVideoClass *contrast_; then below we have @property (nonatomic, retain) MyVideoClass *contrast; @property (nonatomic, retain) FetchClass *fetchMe; The strange part is that the first has an underscrore after the name and the second one, doesn't. The other strange thing is that the guy has a call to these properties like this: FetchClass *fetchOne = [self.fetchMe contrast]; What kind of call is that? This seems pretty insane to me. I simply cannot understand what is going on here, but the code works. pretty insane. Can you guys explain me that? Forgive the stupid question, but I am still learning... thanks

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  • What are the rules about using an underscore in a C++ identifier?

    - by Roger Lipscombe
    It's common in C++ to name member variables with some kind of prefix to denote the fact that they're member variables, rather than local variables or parameters. If you've come from an MFC background, you'll probably use "m_foo". I've also seen "myFoo" occasionally. C# (or possibly just .NET) seems to recommend using just an underscore, as in "_foo". Is this allowed by the C++ standard?

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  • Is private method in spring service implement class thread safe

    - by Roger Ray
    I got a service in an project using Spring framework. public class MyServiceImpl implements IMyService { public MyObject foo(SomeObject obj) { MyObject myobj = this.mapToMyObject(obj); myobj.setLastUpdatedDate(new Date()); return myobj; } private MyObject mapToMyObject(SomeObject obj){ MyObject myojb = new MyObject(); ConvertUtils.register(new MyNullConvertor(), String.class); ConvertUtils.register(new StringConvertorForDateType(), Date.class); BeanUtils.copyProperties(myojb , obj); ConvertUtils.deregister(Date.class); return myojb; } } Then I got a class to call foo() in multi-thread; There goes the problem. In some of the threads, I got error when calling BeanUtils.copyProperties(myojb , obj); saying Cannot invoke com.my.MyObject.setStartDate - java.lang.ClassCastException@2da93171 obviously, this is caused by ConvertUtils.deregister(Date.class) which is supposed to be called after BeanUtils.copyProperties(myojb , obj);. It looks like one of the threads deregistered the Date class out while another thread was just about to call BeanUtils.copyProperties(myojb , obj);. So My question is how do I make the private method mapToMyObject() thread safe? Or simply make the BeanUtils thread safe when it's used in a private method. And will the problem still be there if I keep the code this way but instead I call this foo() method in sevlet? If many sevlets call at the same time, would this be a multi-thread case as well?

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  • undefined method `output_data' for #<EventManager:0x007fa4220320c8> (NoMethodError)

    - by Roger Camps
    I keep getting this error: event_manager.rb:83:in': undefined method output_data' for #<EventManager:0x007fc5018320c0> (NoMethodError) I am following the exercise on this website: Here is my code (My error comes towards the end with DEF OUTPUT_DATA ...): # Dependencies require "csv" # Class Definition class EventManager INVALID_PHONE_NUMBER = "0000000000" INVALID_ZIPCODE = "00000" def initialize puts "EventManager Initialized." filename = "event_attendees.csv" @file = CSV.open(filename, {:headers => true, :header_converters => :symbol}) end def print_names @file.each do |line| puts line.inspect puts line[2] + " " + line[3] end end #printing home phone number method def print_numbers @file.each do |line| number = clean_number(line[:homephone]) puts number end end #cleaning numbers method def clean_number(number) cleaner= number.delete('.' + ')' + '(' + '-') if cleaner.length == 10 # Do Nothing elsif cleaner.length == 11 if cleaner.start_with?("1") cleaner = cleaner[1..-1] else cleaner = INVALID_PHONE_NUMBER end else cleaner = INVALID_PHONE_NUMBER end return cleaner end def clean_zipcode(original) if original.nil? zipcode = INVALID_ZIPCODE elsif original.length < 5 while original.length < 5 original = original.insert(0, "0") end else return original end return zipcode end def print_zipcodes @file.each do |line| zipcode = clean_zipcode(line[:zipcode]) puts zipcode end def output_data output = CSV.open("event_attendees_clean.csv", "w") @file.each do |line| output << line end end end end # Script manager = EventManager.new #manager.print_numbers #manager.print_zipcodes manager.output_data I've tried several things, checked all through the internet and I just can't figure it out myself. I will really appreciate any help. Thank you in advance!

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  • Text substitution (reading from file and saving to the same file) on linux with sed...

    - by Roger
    I want to read the file "teste", make some "find&replace" and overwrite "teste" with the results. The closer i got till now is: $cat teste I have to find something This is hard to find... Find it wright now! $sed -n 's/find/replace/w teste1' teste $cat teste1 I have to replace something This is hard to replace... If I try to save to the same file like this: $sed -n 's/find/replace/w teste' teste or: $sed -n 's/find/replace/' teste > teste The result will be a blank file... I know I am missing something very stupid but any help will be welcome. UPDATE: Based on the tips given by the folks and this link: http://idolinux.blogspot.com/2008/08/sed-in-place-edit.html here's my updated code: sed -i -e 's/find/replace/g' teste

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  • Best Practices around Oracle VM with RAC: RAC SIG webcast - Thursday, March 18th -

    - by adam.hawley
    The RAC SIG will be hosting an interesting webcast this Thursday, March 18th at 9am pacific time (5pm GMT) on: Best Practices around Oracle VM with RAC The adaptation of virtualization technology has risen tremendously and continues to grow due to the rapid change and growth rate of IT infrastructures. With this in mind, this seminar focuses on configuration best practices, examining how Oracle RAC scales & performs in a virtualized environment, and evaluating Oracle VM Server's ease of use. Roger Lopez from Dell IT will be presenting. This Week's Webcast Connection Info: ==================================== Webcast URL (use Internet Explorer): https://ouweb.webex.com/ouweb/k2/j.php?ED=134103137&UID=1106345812&RT=MiM0 Voice can either be heard via the webconference or via the following dial in: Participant Dial-In 877-671-0452 International Dial-In 706-634-9644 International Dial-In No Link http://www.intercall.com/national/oracleuniversity/gdnam.html Intercall Password 86336

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  • 45 % des internautes chinois utiliseraient toujours Internet Explorer 6, comment faire disparaître le logiciel du pays ?

    45.2% des internautes chinois utiliseraient toujours Internet Explorer 6, comment faire disparaître le logiciel du pays ? Mise à jour du 07.12.2010 par Katleen Une étude récente vient de révéler que le vieux navigateur fait de la résistance en Chine. Alors que dans le monde entier, la part de marché de l'ancêtre est de 7.6%, elle atteint presque 50% dans ce pays (ce qui donne alors un total de 14.6% dans le monde, Chine incluse). Un cauchemar pour Microsoft, qui aimerait bien voir ce logiciel disparaître du globe. Roger Capriotti, chef de produit marketing pour Internet Explorer, à en effet pour mission de réduire la part de marché d'IE6 à 0. Malgré tou...

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  • SQL Server 2012 content on Channel 9

    - by jamiet
    A mountain of SQL Server 2012 video content featuring Greg Low, Jonathan Kehayias, Joe Sack and Roger Doherty has just been released on Channel 9. Channel 9 has great support for tags and RSS feeds so if you want to automatically download all of that content simply you can add the following RSS feed: http://channel9.msdn.com/Tags/sql+server+2012/RSS to your podcast reader of choice and have fun learning about all the new features in SQL Server 2012 such as: AlwaysOn Power View SSDT SSRS Data Alerts SSAS Tabular Modelling DAX Improvements MDS improvements SSIS improvements DQS StreamInsight improvements Data-Tier Apps (DACs) LocalDB FileTable Spatial improvements T-SQL paging Distributed Replay XEvents improvements ADO.Net Code-first T-SQL improvements Server roles Partitioning improvements ColumnStore Whew, quite a list! @jamiet

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  • SQL Server 2012 content on Channel 9

    - by jamiet
    A mountain of SQL Server 2012 video content featuring Greg Low, Jonathan Kehayias, Joe Sack and Roger Doherty has just been released on Channel 9. Channel 9 has great support for tags and RSS feeds so if you want to automatically download all of that content simply you can add the following RSS feed: http://channel9.msdn.com/Tags/sql+server+2012/RSS to your podcast reader of choice and have fun learning about all the new features in SQL Server 2012 such as: AlwaysOn Power View SSDT SSRS Data Alerts SSAS Tabular Modelling DAX Improvements MDS improvements SSIS improvements DQS StreamInsight improvements Data-Tier Apps (DACs) LocalDB FileTable Spatial improvements T-SQL paging Distributed Replay XEvents improvements ADO.Net Code-first T-SQL improvements Server roles Partitioning improvements ColumnStore Whew, quite a list! @jamiet

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  • In case you missed our Febrary Oracle Database Webcasts....

    - by jenny.gelhausen
    Click below to register and listen to the February Database Webcast replays: Maximize Availability with Oracle Database 11g with Oracle Database expert Joe Meeks. Think Your Database Applications are Secure? Think Again. with Oracle Security expert Roxana Bradescu. SANS Oracle Database Security: A Defense in Depth Approach with SANS senior instructor Tanya Baccam. Upgrading to Oracle Database 11g with Roger Snowden from Oracle Support's Center of Expertise. Consolidate for Business Advantage: From Storage to Scorecard with Oracle Business Intelligence and Enterprise Performance Management expert Tobin Gilman. Enjoy! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • My integer overfloweth

    - by darcy
    While certain classes like java.lang.Integer and java.lang.Math have been in the platform since the beginning, that doesn't mean there aren't more enhancements to be made in such places! For example, earlier in JDK 8, library support was added for unsigned integer arithmetic. More recently, my colleague Roger Riggs pushed a changeset to support integer overflow, that is, to provide methods which throw an ArithmeticException on overflow instead of returning a wrapped result. Besides being helpful for various programming tasks in Java, methods like the those for integer overflow can be used to implement runtimes supporting other languages, as has been requested at a past JVM language summit. This year's language summit is coming up in July and I hope to get some additional suggestions there for helpful library additions as part of the general discussions of the JVM and Java libraries as a platform.

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