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  • O&rsquo;Reilly Deal of the Day 6/August/2014 - Professional C# 5.0 and .NET 4.5.1

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2014/08/06/orsquoreilly-deal-of-the-day-6august2014---professional-c-5.0.aspxToday’s half-price deal from O’Reilly at http://shop.oreilly.com/product/9781118833032.do?code=MSDEAL, is Professional C# 5.0 and .NET 4.5.1. “Written by a dream team of .NET experts, Professional C# 5.0 and .NET 4.5.1 includes everything developers need to work with C#, the language of choice for .NET applications. This book is perfect for both experienced C# programmers looking to sharpen their skills and professional developers who are using C# for the first time. The authors deliver unparalleled coverage of Visual Studio 2013 and .NET Framework 4.5.1 additions, as well as new test-driven development and concurrent programming features. Source code for all the examples are available for download, so you can start writing Windows desktop, Windows Store apps, and ASP.NET web applications immediately.”

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  • Java: How to get the first day of the current week and month?

    - by cesarlinux
    Hello, I have the date of several events expressed in milliseconds*, and I want to know which events are inside the current week and the current month, but I can't realize how to obtain the first day (day/month/year) of the running week and convert it to milliseconds, the same for the first day of the month. *Since January 1, 1970, 00:00:00 GMT Thanks in advance.

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  • Get the date of a given day in a given week...

    - by Sean.C
    i need to start at a year-month and work out what the date it is in a given week, on a given day within that week.. i.e year: 2009 month: 10 week: 5 day-number: 0 would return 2009-10-25 00:00:00 which is a sunday. Notice week 5, there is no day 0 in week 5 in 2009-10 as the sunday in that logical week is 2009-11-01 00:00:00... so week 5 would always return the last possible date for the given day in the given month.. if you havn't guessed already i'm messing with the c struct TIME_ZONE_INFORMATION (link text) which is pretty crazy if i'm fair... Date math and SQL are something to be admired, sadly its something i have never really dug deep into beyond stripping times. Any help would be greatly appriciated. PS: mssql 2005 btw..

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  • How to show the user one day behind messages in Vb.net webform?

    - by ahmed
    I am working on a Incoming and outgoing messages webform, I would like to show the users the only messages in their INBOX of one day behind. I have a dropdown where I'm giving the selection of All and Pending messages. But if the users have any pending messages in INBOX of just one day behind ,they have to choose All to retrieve the messages. So how do I retrieve messages from message table of just one day behind ? I am using SQL 2000 vb.net web application.

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  • How to set Monday as the first day of the week in GNOME Calendar applet?

    - by Jonik
    What is the recommended way to change the first day of the week to Monday (instead of Sunday, as in the screenshot below)? I couldn't find anything related in Clock Preferences, nor in System - Preferences, or System - Administration. This probably has something to do with tweaking locales, so here's (possibly relevant) output from locale: LANG=en_US.utf8 LC_CTYPE="en_US.utf8" LC_NUMERIC="en_US.utf8" LC_TIME="en_US.utf8" ... LC_ALL= NB: I want to keep English as the UI language both in GNOME and on command line. Dates are currently displayed like this (e.g. ls -l): 2010-10-06 15:32, and I also want to keep that as it is.

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  • Apress Deal of the day - 6/Feb/2011 - Ultra-Fast ASP.NET: Building Ultra-Fast and Ultra-Scalable Websites Using ASP.NET and SQL Server

    - by TATWORTH
    Today's $10 deal of the day at http://www.apress.com/info/dailydeal  is Ultra-Fast ASP.NET: Building Ultra-Fast and Ultra-Scalable Websites Using ASP.NET and SQL Server by Richard Kessig - ISBN 978-1-4302-2383-2 I won a copy of this book at 101 Books. Richard Kessig is an all-star member of forums.asp.net - see http://forums.asp.net/members/RickNZ.aspx " Ultra-Fast ASP.NET provides a practical guide to building extremely fast and scalable web sites using ASP.NET and SQL Server. It strikes a balance between imparting usable advice and backing that advice up with supporting background information. $49.99 | Published Nov 2009 | Rick Kiessig"

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  • Work time in fullcalendar [Solution]

    - by Zozo
    Full calendar have no included options to work-time feature (selecting first and last rows in agenda view for any day - where in example company is not working). I managed something like that: viewDisplay: function(view){ $.ajax({ url: 'index.php?r=calendar/Default/worktime', dataType: 'json', success: function(data){ if(view.name=='agendaWeek') selectWorkTime(data, 30, 0, 24, false); else if(view.name=='agendaDay') selectDayWorkTime(data, 30, 0, 24, view, false); } }); } Where index.php?r=calendar/Default/worktime is php file returning json. It looks like that: $arr = array( 'mon' => array('8:00', '17:00'), 'tue' => array('9:00', '15:00'), 'wed' => array('9:30', '19:00'), 'thu' => array('6:00', '14:00'), 'fri' => array('0:00', '24:00'), 'sat' => array('9:00', '14:00'), 'sun' => array() ); foreach ($arr as &$day){ foreach($day as &$hour){ $tmp = explode(':', $hour); $hour = $tmp[0] * 3600 + $tmp[1] * 60; } } print json_encode($arr); and at the end, some functions using for counting and selecting work-time: function selectDayWorkTime(timeArray, slotMinutes, minTime, maxTime, viewObject, showAtHolidays){ var dayname; $('.fc-content').find('.fc-view-agendaWeek').find('.fc-agenda-body') .children('.fc-work-time').remove(); $('.fc-content').find('.fc-view-agendaDay') .find('.fc-work-time-day').removeClass('fc-work-time-day'); switch(viewObject.start.getDay()){ case 1: dayname='mon'; break; case 2: dayname='tue'; break; case 3: dayname='wed'; break; case 4: dayname='thu'; break; case 5: dayname='fri'; break; case 6: dayname='sat'; break; case 0: dayname='sun'; break; } for(var day in timeArray){ if(day == dayname){ if($('.fc-content').find('.fc-view-agendaDay').find('.fc-'+day).attr('class').search('fc-holiday') == -1 || showAtHolidays){ var startBefore = 0; var endBefore = timeArray[day][0] / (60 * slotMinutes) - (minTime * 60) / slotMinutes; var startAfter = timeArray[day][1] / (60 * slotMinutes) - (minTime * 60) / slotMinutes; var endAfter = (maxTime - minTime) * 60 / slotMinutes - 1; for(startBefore; startBefore < endBefore; startBefore++){ $('.fc-view-agendaDay').find('.fc-slot'+startBefore).find('div').addClass('fc-work-time-day'); } for(startAfter; startAfter <= endAfter; startAfter++){ $('.fc-view-agendaDay').find('.fc-slot'+startAfter).find('div').addClass('fc-work-time-day'); } } } } } function selectWorkTime(timeArray, slotMinutes, minTime, maxTime, showAtHolidays){ for(var day in timeArray){ var startBefore = 0; var endBefore = timeArray[day][0] / (60 * slotMinutes) - (minTime * 60) / slotMinutes; var startAfter = timeArray[day][1] / (60 * slotMinutes) - (minTime * 60) / slotMinutes; var endAfter = (maxTime - minTime) * 60 / slotMinutes - 1; if(startBefore > endBefore) endBefore = startBefore; if(startAfter > endAfter) startAfter = endAfter; try{ selectCell(startBefore, endBefore, 'fc-'+day, 'fc-work-time', false, showAtHolidays); selectCell(startAfter, endAfter, 'fc-'+day, 'fc-work-time', true, showAtHolidays); } catch(e){ continue; } } } function selectCell(startRowNo, endRowNo, collClass, cellClass, closeGap, showAtHolidays){ $('.fc-content').find('.fc-view-agendaWeek').find('.fc-agenda-body') .children('.'+cellClass+''+startRowNo+''+collClass).remove(); $('.fc-content').find('.fc-view-agendaDay') .find('.fc-work-time-day').removeClass('fc-work-time-day'); if($('.fc-content').find('.fc-view-agendaWeek').find('.'+collClass).attr('class').search('fc-holiday') == -1 || showAtHolidays){ var width = $('.fc-content').find('.fc-view-agendaWeek') .find('.'+collClass+':last').width(); var height = 0; if(closeGap && (startRowNo != endRowNo)){ height = $('.fc-content').find('.fc-view-agendaWeek') .find('.fc-slot'+ startRowNo).height(); } $('.fc-view-agendaWeek').find('.fc-agenda-body').prepend('<div class="'+cellClass+' ' + ''+cellClass+''+startRowNo+''+collClass+'"></div>'); $('.'+cellClass).width(width - 2); height += $('.fc-content').find('.fc-view-agendaWeek') .find('.fc-slot'+ endRowNo).position().top - $('.fc-content').find('.fc-view-agendaWeek') .find('.fc-slot'+ startRowNo).position().top; $('.'+cellClass+''+startRowNo+''+collClass).height(height); $('.'+cellClass+''+startRowNo+''+collClass) .css('margin-top', $('.fc-content').find('.fc-view-agendaWeek') .find('.fc-slot'+ startRowNo).position().top); $('.'+cellClass+''+startRowNo+''+collClass) .css('margin-left', $('.fc-content').find('.fc-view-agendaWeek') .find('.'+collClass+':last').offset().left - width / 2); } } Don't forget about CSS: .fc-work-time-day{ background-color: yellow; opacity: 0.3; filter: alpha(opacity=30); /* for IE */ } .fc-work-time{ position: absolute; background-color: yellow; z-index:10; margin: 0; padding: 0; text-align: left; z-index: 0; opacity: 0.3; filter: alpha(opacity=30); /* for IE */ } So, I've got some questions about - is the other way to make the same, but no using absolute div's in agendaWeek? And... How can I get in viewDisplay function actual slotMinutes, minTime and maxTime

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  • How to use string interpolation when rendering templates?

    - by Senthil
    I found this code in a Rails cookbook. class BlogController < ApplicationController def display_by_date year = params[:year] month = params[:month] day = params[:day] day ='0'+day if day && day.size == 1 @day = day if ( year && month && day ) render(:template => "blog/#{year}/#{month}/#{day}") elsif ( year ) render(:template => "blog/#{year}/list") end end end I'm not sure what to name the templates so the router can find them. Thanks for your help.

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  • APress Deal of the Day 15/Jan/2011 - Windows Mobile Game Development: Building games for the Windows Phone and other mobile devices

    - by TATWORTH
    Todays Apress $10 deal of the the day is: Windows Mobile Game Development: Building games for the Windows Phone and other mobile devices This book will provide you with a comprehensive guide to developing games for both the Windows Mobile platform and the Windows Phone using the industry standard programming languages C# and VB.NET. $49.99 | Published Apr 2010 | The book dates from the VS2005/VS2008 era but should still be useful to VS2010 developers. Given that such games development can now be done within Visual Studio. Whilst these devices use the Compact Framework instead of the standard Dot Net Framework, it is still a familiar envirnment. This book should be of benefit not just to games developers but to anyone with an interest in development for mobile phones.

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  • 2012. november 8. Oracle Day, Budapest

    - by user645740
    2 nap múlva Oracle Day Budapesten, november 8-án. Regisztráció itt! Aki nem regisztrált: regisztráljon, és jöjjön el az Oracle legnagyobb magyarországi rendezvényére! Aki regisztrált: jöjjön! 3 eloadást fogok tartani: A NAGY ADAT: ADATELEMZÉS, MINT AZ INNOVÁCIÓ MOTORJA szekcióban: Jobb áttekintés, gyorsabb cselekvés memóriában történo elemzésekkel (Exalytics) Fejlett elemzési lehetoségek az adatbázisban, Advanced Analytics: Oracle Data Mining és az R Enterprise A TERVEZZÜNK "FELHOT": SORVEZETO FELHO INFRASTRUKTÚRA ÉPÍTÉSÉHEZ szekcióban Oracle Database, merre fejlodik tovább? Regisztráció itt! http://www.facebook.com/oracledays

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  • Member Function Pointer not quite right

    - by BlackDuck
    I have a SpecialisedRedBlackTree class that is templated. My Month class is not. In my Month class I have a private member which is an instance of SpecialisedRedBlackTree: SpecialisedRedBlackTree<Day> m_windSpeedTree; As you can see it will take the Day class/object (please correct me on any terms I get wrong). In my Month class, I have a method passing a method function pointer to this method: bool Month::CompareWindSpeed(Day a, Day b) { return ( a.GetData(WIND_SPEED_CODE) < b.GetData(WIND_SPEED_CODE)? true : false); } bool (Month::*myFuncPtr)(Day, Day); myFuncPtr = &Month::CompareWindSpeed; m_windSpeedTree.Insert(dayReading, myFuncPtr); But because I am passing a bool (Day, Day) pointer to a templated class expecting bool (T, T) T being part of this .... template Error 1 error C2664: 'SpecialisedRedBlackTree<T>::Insert' : cannot convert parameter 2 from 'bool (__thiscall Month::* )(Day,Day)' to 'bool (__cdecl *)(T,T)' Any advice?

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  • Faille zero-day découverte dans Internet Explorer, permettant de prendre à distance le contrôle d'un PC, Microsoft recommande EMET

    Faille zero-day découverte dans Internet Explorer permettant de prendre à distance le contrôle d'un ordinateur, Microsoft recommande EMET Une faille de sécurité critique dans Internet Explorer 6, 7, 8 et 9 vient d'être découverte par des experts en sécurité. Dans un billet de blog sur ZATAZ.com, Eric Romang, un conseiller en sécurité luxembourgeois, déclare avoir découvert la vulnérabilité lorsque son PC a été infecté par le cheval de troie Poison Ivy, qui est utilisé pour voler des données ou prendre le contrôle à distance d'un ordinateur. La faille pourrait être exploitée par des pirates distants qui peuvent obtenir les mêmes privilèges que l'utilisateur local, pour installer de...

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  • Vulnérabilité critique 0-day découverte dans Windows, elle permet l'installation distante de programmes malveillants et expose l'OS

    Vulnérabilité critique 0-day dans Windows Elle permet d'installer des programmes malveillants et expose l'OS au danger Microsoft alerte les utilisateurs de sWindows qu'une nouvelle vulnérabilité qualifiée de critique qui a été découverte. Dans un bulletin de sécurité publié dans la nuit, Microsoft reconnait que son OS est victime d'un bug dans le moteur de rendu graphique qui pourrait permettre à des pirates distants d'installer des programmes malveillants, d'afficher, de modifier ou de supprimer des données ou même de créer de nouveaux comptes avec droits administrateurs ; et ce tout simplement en faisant visualiser à un utilisateur une image malicieuse dans un navigateur Web ou un docum...

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  • How to iterate in this query?

    - by Umaid
    for (int I=-1; I<30; I++) { for (int J=0; J<30; J++) { for(int K=1; K<30; K++) { SELECT rowid,Month, Day, Advice from MainCategory where Month= 'May ' and Day in ((cast(strftime('%d',date('now','+(I) day')) as Integer)),(cast(strftime('%d',date('now','+(J) day')) as Integer)),(cast(strftime('%d',date('now','+(K) day')) as Integer))); } } } And for the same reason how to decrement in this query for (int I=-1; I<30; I--) { for (int J=0; J<30; J--) { for(int K=1; K<30; K--) { SELECT rowid,Month, Day, Advice from MainCategory where Month= 'May ' and Day in ((cast(strftime('%d',date('now','(I) day')) as Integer)),(cast(strftime('%d',date('now','(J) day')) as Integer)),(cast(strftime('%d',date('now','(K) day')) as Integer))); } } }

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  • Problems with instantiating in JAVA

    - by PUPIALEX
    When running, below programme cannot reach the end of the main function.. I am new to JAVA, and cannot find its defections.. I need your help. Thanks. import java.util.*; class Schedule { public String day; private int startTime, endTime; public Schedule(String input_day, int input_start, int input_end) { day = input_day; startTime = input_start; endTime = input_end; } /* clashWith: to check whether this schedule clash with a Schedule called otherSchedule * PRE-Condition : input must be of Schedule type * POST-Condition : return true if two Schedule clash, return false if not. */ public boolean clashWith(Schedule otherSchedule) { if(this.day != otherSchedule.day || this.endTime <= otherSchedule.startTime || this.startTime >= otherSchedule.endTime) return false; return true; } } class Module { String code; Schedule lecture, tutorial, lab; public Module(String input_code, Schedule input_lecture, Schedule input_tutorial, Schedule input_lab) { code = input_code; lecture = input_lecture; tutorial = input_tutorial; lab = input_lab; } /* count: to count number of classes(lecture, tutorial, and lab of only this Module) on day. * For example: when day = "Monday", lecture is on Monday, tutorial is on Monday * but lab is on Tuesday, then return 2. (lecture and tutorial are on Monday). * PRE-Condition : * POST-Condition : */ public int count(String day) { int num = 0; if(lecture.day == day) num++; if(tutorial.day == day) num++; if(lab.day == day) num++; return num; } /* clashWith: to check whether this module clash with a Module called otherModule * PRE-Condition : * POST-Condition : */ public boolean clashWith(Module otherModule) { if(lecture.clashWith(otherModule.lecture) || lecture.clashWith(otherModule.tutorial) || lecture.clashWith(otherModule.lab) ) return true; if(tutorial.clashWith(otherModule.lecture) || tutorial.clashWith(otherModule.tutorial) || tutorial.clashWith(otherModule.lab)) return true; if(lab.clashWith(otherModule.lecture) || lab.clashWith(otherModule.tutorial) || lab.clashWith(otherModule.lab)) return true; return false; } } class Timetable { Vector<Module> listOfModule; public Timetable() { } /* checkClash: to check whether otherModule clash with one of * the modules in our timetable list. * PRE-Condition : * POST-Condition : */ public boolean checkClash(Module otherModule) { for(Module c: listOfModule) if(c.clashWith(otherModule)) return true; return false; } /* add: to add a new module to the timetable list. * PRE-Condition : * POST-Condition : */ public void add(Module module) { listOfModule.add(module); } /* count: to count number of classes on day. * PRE-Condition : * POST-Condition : */ public int count(String day) { int count_day=0; for(Module c: listOfModule) count_day += c.count(day); return count_day; } } public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); int num_operation; String code ; Timetable userTimetable = new Timetable(); num_operation = input.nextInt(); for(int i=0;i<num_operation;i++) { if(input.next() == "MODULE") { code = input.next(); String day; int start, end; Schedule getLecSche = new Schedule(input.next(),input.nextInt(),input.nextInt()); Schedule getTutSche = new Schedule(input.next(),input.nextInt(),input.nextInt()); Schedule getLabSche = new Schedule(input.next(),input.nextInt(),input.nextInt()); Module userModule = new Module(code, getLecSche, getTutSche, getLabSche); System.out.println("Reached line 162"); if(!userTimetable.checkClash(userModule)) { userTimetable.add(userModule); System.out.println("Added"); } else System.out.println("Clashed"); } else if(input.next() == "COUNT"){ code = input.next(); System.out.println(userTimetable.count(code)); } } } }

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  • How do I blend 2 lightmaps for day/night cycle in Unity?

    - by Timothy Williams
    Before I say anything else: I'm using dual lightmaps, meaning I need to blend both a near and a far. So I've been working on this for a while now, I have a whole day/night cycle set up for renderers and lighting, and everything is working fine and not process intensive. The only problem I'm having is figuring out how I could blend two lightmaps together, I've figured out how to switch lightmaps, but the problem is that looks kind of abrupt and interrupts the experience. I've done hours of research on this, tried all kinds of shaders, pixel by pixel blending, and everything else to no real avail. Pixel by pixel blending in C# turned out to be a bit process intensive for my liking, though I'm still working on cleaning it up and making it run more smoothly. Shaders looked promising, but I couldn't find a shader that could properly blend two lightmaps. Does anyone have any leads on how I could accomplish this? I just need some sort of smooth transition between my daytime and nighttime lightmap. Perhaps I could overlay the two textures and use an alpha channel? Or something like that?

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  • how many times can i buy swtor credits with Extra 100% Bonus in Father’s Day at swtor2credits?

    - by user46860
    When you buy swtor credits, the most important factor must be the price of swtor credits! how can you get the cheap swtor credits? Big surprise for you: For such a special festival - Father’s Day, swtor2credits made a super promotion for all of the swtor players, in the only three days promotion time, you can buy 1600 credits with only $5.04, buy 2000 credits with only $6.30, and 3000k Credits just only need $9.44. The detail time is June 16 to June 18, 2014, 02:00-03:00 a.m. GMT! swtor2credits have been selling at a big loss with so much cheap swtor credits, this is mean 50% off for your order! that is really a crazy super promotion! So may you can not use the 8% disount code and getting double swtor credits at the same time! Everyone has only one chance to get double swtor credits at swtor2credits during our promotion.As long as your order has used extra discount code or voucher, you lose the chance to get exclusive 100% bonus. don't miss the time to buy such cheap swtor credits, like swtor2credits facebook give you more surprise, From May 29, 2014 to June 12.2014.GMT, you can gain Free Cash Coupon, Up to $16 Giveaways for Swtor Credits if you like swtor2credits facebook! http://www.swtor2credits.com/

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  • ??????????????!?Oracle Solaris 11.1 Day? ??????????

    - by OTN-J Master
    ????????????Oracle Solaris??20???????????? ?????????????????Oracle Solaris 11.1????????11????300???????????????????????????OS???????Oracle Database????????????????OS????????????????>> ???????? ?Oracle Solaris 11:??????OS? ???????11?30?(?)????????????Oracle Solaris 11.1 Day???????????????????????????????????????????????????????????????????????!???Solaris???????????????????????????????????Web??????????????????????????????????????????????????????Solaris 11??????????????????????????????????????????????????????????????????>>??????!????: 11?30?(?)13:00~15:30 (????12:30)?????: ???????? 13F???????(??????)???????  “The First Cloud OS” ???????Oracle Solaris 11??????????????????????????????????????????? IT ????????????????????????????????????????????????IT???????OS????????????????????Oracle OpenWorld 2012?????????Solaris11?????????????????????Solaris 11.1 ???????????????????Solaris????????????????????OS??Oracle?????????????????????????????????????Oracle Solaris????????????????????? ?????? ?13:30~13:40? ???????????????????????!???????????????????OS????????????????????? ???????????????? ?? ?? ? ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????IT????????????????????????????????????????????????????????????????????????????????????IT???????Enterprise??????????????????????? ?13:40~14:20?[??????????????]Oracle Solaris11.1 ?????????????????? ????????????? ??? ?“The First Cloud OS” ???????Oracle Solaris 11??????????????????????????????????????????? IT ??????????????????????????????????????????????????Oracle OpenWorld 2012?????????Solaris11?????????????????????Solaris 11.1 ???????????????? ?14:30~15:00?[?????????????????] ??????!Solaris 11 Beta ????????????????????   ???????   ? ?? ? ????????Oralce Solaris 11 Beta ?????????????????????????????????????????????15:00~15:20?[????????????????]Solaris 11 ?????????????????????? ??????????? ???????  ?? ?? Oracle University ?????????????????????????????????????????????????(Classroom Training)?????????????????????????????????????????????????????????Oracle University?????Solaris 11????????????????????? >> ??????????

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  • What should i buy. Dual Core or Quad Core? [I am a netbeans/eclipse programmer]

    - by cdb
    I am going to buy a new desktop CPU.I am a programmer mainly uses Netbeans IDE for java web application development with glassfish application server.I went through the discussion regarding Dual Core or Quad Core. My doubt is that softwares like IDE's(Netbeans,Eclipse etc with server running) are written with multiple core in mind or not?.I am not a game addict.. So what is best for me and which company should i choose..AMD/Intel..

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  • What books should I read to be be able to communicate with programmers? [migrated]

    - by Zak833
    My experience is in online marketing, UI/UX and web design, but I know virtually no programming. I have recently been hired to build a new, fairly complex site from scratch, for which I will be working with an experienced programmer with whom I have worked extensively in the past. Although I have a decent understanding of certain technical concepts relating to web development, I would like to build a better appreciation of the programmer's craft, in order to improve communication with my programmer, as well as the client. I have heard Code Complete is quite a good book for this. Other than reading this and learning some basic programming, are there any other books or resources that could be recommended to the non-programmer who does not wish to become a programmer, yet wishes to understand the most common concepts involved in building software, web-based or otherwise?

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  • Independence Day for Software Components &ndash; Loosening Coupling by Reducing Connascence

    - by Brian Schroer
    Today is Independence Day in the USA, which got me thinking about loosely-coupled “independent” software components. I was reminded of a video I bookmarked quite a while ago of Jim Weirich’s “Grand Unified Theory of Software Design” talk at MountainWest RubyConf 2009. I finally watched that video this morning. I highly recommend it. In the video, Jim talks about software connascence. The dictionary definition of connascence (con-NAY-sense) is: 1. The common birth of two or more at the same time 2. That which is born or produced with another. 3. The act of growing together. The brief Wikipedia page about Connascent Software Components says that: Two software components are connascent if a change in one would require the other to be modified in order to maintain the overall correctness of the system. Connascence is a way to characterize and reason about certain types of complexity in software systems. The term was introduced to the software world in Meilir Page-Jones’ 1996 book “What Every Programmer Should Know About Object-Oriented Design”. The middle third of that book is the author’s proposed graphical notation for describing OO designs. UML became the standard about a year later, so a revised version of the book was published in 1999 as “Fundamentals of Object-Oriented Design in UML”. Weirich says that the third part of the book, in which Page-Jones introduces the concept of connascence “is worth the price of the entire book”. (The price of the entire book, by the way, is not much – I just bought a used copy on Amazon for $1.36, so that was a pretty low-risk investment. I’m looking forward to getting the book and learning about connascence from the original source.) Meanwhile, here’s my summary of Weirich’s summary of Page-Jones writings about connascence: The stronger the form of connascence, the more difficult and costly it is to change the elements in the relationship. Some of the connascence types, ordered from weak to strong are: Connascence of Name Connascence of name is when multiple components must agree on the name of an entity. If you change the name of a method or property, then you need to change all references to that method or property. Duh. Connascence of name is unavoidable, assuming your objects are actually used. My main takeaway about connascence of name is that it emphasizes the importance of giving things good names so you don’t need to go changing them later. Connascence of Type Connascence of type is when multiple components must agree on the type of an entity. I assume this is more of a problem for languages without compilers (especially when used in apps without tests). I know it’s an issue with evil JavaScript type coercion. Connascence of Meaning Connascence of meaning is when multiple components must agree on the meaning of particular values, e.g that “1” means normal customer and “2” means preferred customer. The solution to this is to use constants or enums instead of “magic” strings or numbers, which reduces the coupling by changing the connascence form from “meaning” to “name”. Connascence of Position Connascence of positions is when multiple components must agree on the order of values. This refers to methods with multiple parameters, e.g.: eMailer.Send("[email protected]", "[email protected]", "Your order is complete", "Order completion notification"); The more parameters there are, the stronger the connascence of position is between the component and its callers. In the example above, it’s not immediately clear when reading the code which email addresses are sender and receiver, and which of the final two strings are subject vs. body. Connascence of position could be improved to connascence of type by replacing the parameter list with a struct or class. This “introduce parameter object” refactoring might be overkill for a method with 2 parameters, but would definitely be an improvement for a method with 10 parameters. This points out two “rules” of connascence:  The Rule of Degree: The acceptability of connascence is related to the degree of its occurrence. The Rule of Locality: Stronger forms of connascence are more acceptable if the elements involved are closely related. For example, positional arguments in private methods are less problematic than in public methods. Connascence of Algorithm Connascence of algorithm is when multiple components must agree on a particular algorithm. Be DRY – Don’t Repeat Yourself. If you have “cloned” code in multiple locations, refactor it into a common function.   Those are the “static” forms of connascence. There are also “dynamic” forms, including… Connascence of Execution Connascence of execution is when the order of execution of multiple components is important. Consumers of your class shouldn’t have to know that they have to call an .Initialize method before it’s safe to call a .DoSomething method. Connascence of Timing Connascence of timing is when the timing of the execution of multiple components is important. I’ll have to read up on this one when I get the book, but assume it’s largely about threading. Connascence of Identity Connascence of identity is when multiple components must reference the entity. The example Weirich gives is when you have two instances of the “Bob” Employee class and you call the .RaiseSalary method on one and then the .Pay method on the other does the payment use the updated salary?   Again, this is my summary of a summary, so please be forgiving if I misunderstood anything. Once I get/read the book, I’ll make corrections if necessary and share any other useful information I might learn.   See Also: Gregory Brown: Ruby Best Practices Issue #24: Connascence as a Software Design Metric (That link is failing at the time I write this, so I had to go to the Google cache of the page.)

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  • Getting started as a programmer -- school or self-study?

    - by Cyberherbalist
    My son who has is married with two small children has decided that he needs a change of career, and is considering getting into programming. He would do well in the field, I am certain, but I am uncertain how to advise him with regards to a lengthy course of schooling, or just try to learn 'on the job", so to speak. I suspect that if he doesn't ultimately get at least an associate degree in program (like his old man), that his job possibilities are going to be very constrained. This isn't the Dot-Com Bubble, after all, when they'd hire you if you could spell c-o-m-p-u-t-e-r because they needed bodies and the ability to fog a mirror wasn't quite enough. Should he go for a full program at the university, a two-year program (he already has a 2-year degree in video production, so he's got the general ed requirements whipped), or does anyone think self-study alone might be enough? To get started, anyway. I started back in 1987 with COBOL and a 2-year degree, which seemed the minimum at the time, but perhaps things are different now?

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  • How to become a professional web developer from a C/C++ programmer?

    - by user1050165
    I am new here. This is my first post on stackoverflow. I am currently a high school student and know how to use Pascal and C/C++ to take part in competitions such as the Informatics in Olympiad. I have learnt data structure and many algorithms to solve various kinds of problems. Now, I want to move on to become a web developer. However, I know web development is quite different from competitive programming. To make a web application, I have to master HTML, Database, Backend programming etc. But these are all look like separate pieces of information. I don't know where to start and what order should I follow. Anybody who can give a comprehensive list of learning points? I know there are HTML, Ruby on Rails, CSS and Javascript. What else? More importantly, can someone give a brief outline of their relationship? I hope I can get help from you asap. Thanks!

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