Search Results

Search found 8166 results on 327 pages for 'seven year liberal arts degree'.

Page 245/327 | < Previous Page | 241 242 243 244 245 246 247 248 249 250 251 252  | Next Page >

• Choosing a distributed shared memory solution

  - by mindas

  I have a task to build a prototype for a massively scalable distributed shared memory (DSM) app. The prototype would only serve as a proof-of-concept, but I want to spend my time most effectively by picking the components which would be used in the real solution later on. The aim of this solution is to take data input from an external source, churn it and make the result available for a number of frontends. Those "frontends" would just take the data from the cache and serve it without extra processing. The amount of frontend hits on this data can literally be millions per second. The data itself is very volatile; it can (and does) change quite rapidly. However the frontends should see "old" data until the newest has been processed and cached. The processing and writing is done by a single (redundant) node while other nodes only read the data. In other words: no read-through behaviour. I was looking into solutions like memcached however this particular one doesn't fulfil all our requirements which are listed below: The solution must at least have Java client API which is reasonably well maintained as the rest of app is written in Java and we are seasoned Java developers; The solution must be totally elastic: it should be possible to add new nodes without restarting other nodes in the cluster; The solution must be able to handle failover. Yes, I realize this means some overhead, but the overall served data size isn't big (1G max) so this shouldn't be a problem. By "failover" I mean seamless execution without hardcoding/changing server IP address(es) like in memcached clients when a node goes down; Ideally it should be possible to specify the degree of data overlapping (e.g. how many copies of the same data should be stored in the DSM cluster); There is no need to permanently store all the data but there might be a need of post-processing of some of the data (e.g. serialization to the DB). Price. Obviously we prefer free/open source but we're happy to pay a reasonable amount if a solution is worth it. In any way, paid 24hr/day support contract is a must. The whole thing has to be hosted in our data centers so SaaS offerings like Amazon SimpleDB are out of scope. We would only consider this if no other options would be available. Ideally the solution would be strictly consistent (as in CAP); however, eventual consistence can be considered as an option. Thanks in advance for any ideas.

  Read the article

• Quaere - Anyone using it yet? (LINQ to Objects for Java)

  - by Marty Pitt

  Hi there I'm a .NET guy originally, working in Java recently, and finding I'm really missing LINQ to Objects, specifically for performing filtering against collections. A few people here on Stack Overflow have answered the "LINQ for Java?" question with a single word : Quaere However, on the site it clearly states "Pre-Beta", and there's been no commits to their code for over a year, so I'm guessing the project is pretty much dead. Is anyone actually using this, and / or have any experience with it? The second most common answer appears to be "use Google Collections". Is this the most appropriate Java way? Cheers Marty

  Read the article

• ls output changing when used through exec()

  - by user359650

  I'm using the ls command via PHP and exec() and I get a different output than when I run the same command via the shell. When running ls through PHP the year and month of the date get changed into the month name: Running the command through the shell: $ ls -lh /path/to/file -rw-r--r-- 1 sysadmin sysadmin 36M 2011-05-18 13:25 file Running the command via PHP: <?php exec("ls -lh /path/to/file", $output); print_r($output); /* Array ( [0] => -rw-r--r-- 1 sysadmin sysadmin 36M May 18 13:25 file ) */ Please note that: -the issue doesn't occur when I run the PHP script via the cli (it only occurs when run through apache) -I checked the source code of the page to make sure that what I was seeing was what I was getting (and I do get the month name instead of the proper date) -I also run the ls command through the shell as the www-data user to see if ls was giving different output depending on the user (the output is the always the same from the shell, that is I get the date in yyyy-mm-dd instead of the month name)

  Read the article

• Sass mixin not compiling?

  - by corroded

  I have previously made a mixin in sass 2.2.22 for my font sizes(it's a font converter), like so: =6.5pts :font :size 9px It has been working ever since i first made it a year ago. We just upgraded to haml/sass 3 and now whenever I try to refresh the page im working on, a sass compile error appears like so: http://grab.by/4yFE I don't get it since Sass 3 documentation says that the = declaration for mixins is NOT deprecated. I tried uninstalling haml 3.0, restarted my server and deleted the generated css file and now it apparently works. Problem is, I need haml 3 for another related project where we just started using Compass. Why is the compiler complaining when the documentation claims the declaration is not deprecated?

  Read the article

• GNUPlot: change axis labels

  - by Robert

  Dear Guys, I have used the following statement to get the GNUPlot plot a grah for me: plot "force.dat" using 1:2 title "Detroit" with lines, \ "force.dat" u 1:3 t "US Avergae" w linepoints and the "force.dat" looks like 2005 0 0 2006 104 51 2007 202 101 It draws nice graph for me. However, I don't like the X-axis, because it is labelled as 2005, 2005.5, 2006, 2006.5, 2007 etc.. However, those are year identifiers, I only want the 2005, 2006, 2007 etc., how could I get rid of the 2005.5, 2006.5 etc. labels in my GNUPlot graph? Thank you very much for your ideas.

  Read the article

• Good learning resources for JNDI implementation (JBoss 5)

  - by iandisme

  I have been working with JavaEE/EJB3 web apps for about half a year now. Until recently, I haven't had to touch a lot of the behind-the-scenes stuff, just the meat of the code. I have been wrestling with JNDI problems, and though I've solved a couple of them, I'm pretty much just doing the whole cargo cult copy-paste routine. It would really help me to better understand JNDI; my understanding of it right now can be summarized as "it's that thing these classes sometimes do to find other classes." My question is, has anyone had success learning JNDI/EJB3/related topics from a book or online content? I've googled for it but the stuff that comes up is old or specific to a certain framework I'm not using. I'm looking for something that's either JBoss-specific or generic enough to be useful anyway.

  Read the article

• ruby in 100 minutes good_morning method issue

  - by user2525947

  I have been doing the Ruby in 100 minutes on the JumpStart labs website, and encountered a problem during part 5. I was asked to create a good_morning method that would print out a greeting such as 'Happy Monday, it's the 130 day of 2013'. Here is my current program: class PersonalChef def good_morning today = Date.today.strftime("%A") day_of_year = Date.today.yday puts "Happy#{today}! It is the #{day_of_year} day of year." return self end def make_toast(color) puts " Making your toast #{color}!" return self end def make_milkshake(flavor) puts " Making a #{flavor} milkshake!" return self end def make_eggs(quantity) puts " Making you #{quantity} eggs!" return self end end when I try to run the program load on irb( 'personal_chef.rb', frank = PersonalChef.new, frank.make_milkshake('chocolate'), etc, everything works fine until I try to type frank.good_morning into irb, which gives the following error message: NameError: uninitialized constant PersonalChef :: Date from personal_chef.rb:5: in good_morning from (irb):3 from /bin/irb:12:in '' Any help or information to help me solve this issue would be greatly appreciated. Thanks for your time!

  Read the article

• What is a reasonly priced map API solution for a startup?

  - by Kevin

  I've been developing my application with Google Maps and the wonderful rails plugin for it, expecting to find that when I put my app into production that the commercial licensing wouldn't be too expensive. Then I found out it cost $10,000/year, no exceptions so far. http://www.47hats.com/2009/07/google-maps-the-10k-gotcha/ That's not a terrible price to pay for unlimited usage when your site becomes successful, but for those of us trying to build something from the ground up, that's a hefty price to pay. I've looked at Bing and Yahoo but they're very wishy-washy with what ballpark the pricing is. That on top of the fact I have to ditch my nice rails plugin YM4R for Google maps... Is anyone out there using a map API solution that doesn't cost an arm and a leg to get started with in a commercial aspect? I don't mind not using a plugin, I just need something that will work and is cost affordable in the beginning.

  Read the article

• When is it good to start using project management applications?

  - by Mr.Gando

  Hello, I was wondering, when is the right time or the correct project size to start using project management applications ( like Redmine or Trac ). I have a serious project, for now it's only me developing, but I use redmine to set my project versions, issues, and estimations. I think it's a good idea, because you never know when somebody else is going to join the team, and also allows me to organize myself effectively. I ask this question because I was Teaching Assistant at my university for one year in a row for a course, and I got questions about this very very often. While I'm a believer of the KISS principle, I think that learning to use this tools early is a win-win most of the time. I really believe that we can avoid this question to become argumentative, and that there's somewhat of a consensus about this issue, which I consider quite important in todays software development world. So, when is the right time ? what is the correct project/team size ?

  Read the article

• Which style is preferable when writing this boolean expression?

  - by Jeppe Stig Nielsen

  I know this question is to some degree a matter of taste. I admit this is not something I don't understand, it's just something I want to hear others' opinion about. I need to write a method that takes two arguments, a boolean and a string. The boolean is in a sense (which will be obvious shortly) redundant, but it is part of a specification that the method must take in both arguments, and must raise an exception with a specific message text if the boolean has the "wrong" value. The bool must be true if and only if the string is not null or empty. So here are some different styles to write (hopefully!) the same thing. Which one do you find is the most readable, and compliant with good coding practice? // option A: Use two if, repeat throw statement and duplication of message string public void SomeMethod(bool useName, string name) { if (useName && string.IsNullOrEmpty(name)) throw new SomeException("..."); if (!useName && !string.IsNullOrEmpty(name)) throw new SomeException("..."); // rest of method } // option B: Long expression but using only && and || public void SomeMethod(bool useName, string name) { if (useName && string.IsNullOrEmpty(name) || !useName && !string.IsNullOrEmpty(name)) throw new SomeException("..."); // rest of method } // option C: With == operator between booleans public void SomeMethod(bool useName, string name) { if (useName == string.IsNullOrEmpty(name)) throw new SomeException("..."); // rest of method } // option D1: With XOR operator public void SomeMethod(bool useName, string name) { if (!(useName ^ string.IsNullOrEmpty(name))) throw new SomeException("..."); // rest of method } // option D2: With XOR operator public void SomeMethod(bool useName, string name) { if (useName ^ !string.IsNullOrEmpty(name)) throw new SomeException("..."); // rest of method } Of course you're welcome to suggest other possibilities too. Message text "..." would be something like "If 'useName' is true a name must be given, and if 'useName' is false no name is allowed".

  Read the article

• How to display some data differnetly than it is stored.

  - by Ben

  Hello, I seem to have a problem that I can't find a solution for. I have a table that has this format. projectId | departmentId | plan | ETC | month | year | ID But, I need to find a way to take that data and display it like this. Since this is my first time here I can't upload an image, but you can view it here. http://img85.imageshack.us/img85/8253/image004y.png Is this something a gridview can handle, or a repeater, or something else? Thank you. Ben

  Read the article

• Agile Approach for WCM

  - by cameron.f.logan

  Can anyone provide me with advice, opinions, or experience with using an agile methodology to delivery an enterprise-scale Web Content Management system (e.g., Interwoven TeamSite, Tridion)? My current opinion is that to implement a CM system there is a certain--relatively high--amount of upfront work that needs to happen to make sure the system is going to be scalable and efficient for future projects for the multi-year lifespan an WCM is expected to have. This suggests a hybrid approach at best, if not a more waterfall-like approach. I'm really interested to learn what approaches others have taken. Thanks.

  Read the article

• Three State Treeview Windows Forms

  - by alhambraeidos

  Hello everybody people, One of the frustrations with the standard TreeView is that you can't show a partial selection to indicate that some of the children are selected. A partial selection in a complex tree allows the user to easily determine where the selections are, even if the tree is not completely expanded. A similar idea is used in manu backup programs to allow the user to select the files to be backed up. Does anyone know of a way to make the checks in a treeview checkbox gray? I want to gray the check of a parent node when some (but not all) of its child nodes are checked. Kinda like what you see when you are selecting options to install during a software installation. I have seen several post, but is older (2000, 2007 year). I now, in 2010, the better answer possible is required. I use VS 2008 . Net 3.5 , Windows Forms Thanks in advanced, greetings

  Read the article

• Convert object to DateRange

  - by user655832

  I'm querying an underlying PostgreSQL database using Pandas 0.8. Pandas is returning the DataFrame properly but the underlying timestamp column in my database is being returned as a generic "object" type in Pandas. As I would eventually like to seasonal normalization of my data I am curious as to how to convert this generic "object" column to something that is appropriate for analysis. Here is my current code to retrieve the data: # get records from db example import pandas.io.sql as psql import psycopg2 # define query to get all subs created this year QRY = """ select i i, i * random() f, case when random() > 0.5 then true else false end t, (current_date - (i*random())::int)::timestamp with time zone tsz from generate_series(1,1000) as s(i) order by 4 ; """ CONN_STRING = "host='localhost' port=5432 dbname='postgres' user='postgres'" # connect to db conn = psycopg2.connect(CONN_STRING) # get some data set index on relid column df = psql.frame_query(QRY, con=conn) print "Row count retrieved: %i" % (len(df),) Thanks for any help you can render. M

  Read the article

• MSSQL choosing row (from group) with max value

  - by sriehl

  I have a large database and am putting together a report of the data. I have aggregated and summed the data from many tables to get two tables that look like the following. id | code | value id | code | value 13 | AA | 0.5 13 | AC | 2.0 13 | AB | 1.0 14 | AB | 1.5 14 | AA | 2.0 13 | AA | 0.5 15 | AB | 0.5 15 | AB | 3.0 15 | AD | 1.5 15 | AA | 1.0 I need to get a list of id's, with the code (sumed from both tables) with the largest value. 13 | AC 14 | AA 15 | AB There are 4-6 thousand records and it is not possible to change the original tables. I'm not too worried about performance as I only need to run it a few times a year.

  Read the article

• Perl script to print out cars model and car color

  - by Gary Liggons

  I am tying to create a perl script to printout car models and colors, and the data is below. I want to know if there is anyway to make the car model heading a field so that I can print it any time I want to? the data below is a csv file. the way I want the data to look on a report is below as well This is how the data looks* Chevy blue,1978,Washington brown,1989,Dallas black,2001,Queens white,2003,Manhattan Toyota red,2003,Bronx green,2004,Queens brown,2002,Brooklyn black,1999,Harlem ****This is how I am trying to get the data to look in a report**** Car Model:Toyota Color:Red Year:2002 City: Queens

  Read the article

• The Columns in table <table> do not match an existing primary key or unique constraint

  - by Sven

  I have 2 tables, Stores - storeId (int) and year (int(4)) both Primary Keys. fruit - fruitId - Primary Key and storeId. I need to create 1 to many relationship between the Store and Fruit (Foreign Key held within Fruit) how ever I always get shown the error - The Columns in table <table> do not match an existing primary key or unique constraint. The type's are both int and named the same. Any help would be appreciate in advance, many thanks.

  Read the article

• Getting latest Subsonic builds

  - by Alex Yakunin

  I need the latest Subsonic build or build it by my own. Subsonic project web site shows the latest available version is Subsonic v3.0.0.3 released at July 15, 2009. Questions: Are there any later builds - e.g. maintained by community members? If so, how can I get the latest one? In worst case I'm ready to get the latest source code and try to build it by my own. Are there any instructions for this? Please note, that I'm not interested in almost 1 year old builds - I need a build based on the latest code for tests (LINQ, performance), ideally - compiled for .NET 4.0.

  Read the article

• SQL Query Help Part 2 - Add filter to joined tables and get max value from filter

  - by Seth

  I asked this question on SO. However, I wish to extend it further. I would like to find the max value of the 'Reading' column only where the 'state' is of value 'XX' for example. So if I join the two tables, how do I get the row with max(Reading) value from the result set. Eg. SELECT s.*, g1.* FROM Schools AS s JOIN Grades AS g1 ON g1.id_schools = s.id WHERE s.state = 'SA' // how do I get row with max(Reading) column from this result set The table details are: Table1 = Schools Columns: id(PK), state(nvchar(100)), schoolname Table2 = Grades Columns: id(PK), id_schools(FK), Year, Reading, Writing...

  Read the article

• Best approach to show big amount of "grid" data

  - by Jorge Ramírez

  Hello all. I am building an application for Android (1.5) that, after quering a webservice, shows to the user a big amount of data that should be displayed in a "grid" or "table" style. I must show a result of about 7 columns and 50 rows (for example a customer list with names, adresses, telephone number, sales amount last year and so). Obviously, the 7 columns will not fix in the screen and I would like the user would be able to scroll up/down and LEFT/RIGHT (important because of the number of columns) to explore the grid results. cell selection level is NOT necessary, as much I would need row selection level. What is the best approach to get this interface element? Listview / GridView / TableLayout? Thanks

  Read the article

• What are the reasons to use SQL Server instead of MySQL with a complex .Net project?

  - by cdeszaq

  We currently have a 10 year old nasty, spaghetti-code-style SQL Server database that we are soon looking to pretty much re-write from scratch as part of a re-write to a large web application. (The existing application will serve as the functional requirements for the next incarnation of the app) The new version will be developed in .Net, so a large portion of the application stack will be based on Microsoft technologies (Visual Studio will be used IIS will be the application server). One of the developers on the project has raised the possibility of switching to MySQL instead of SQL Server in order to save on cost for both the licence of the DB server, as well as the tools to design and manipulate the DB (such as the wonderfully free MySQL Workbench). What are the various pros and cons of using SQL Server vs. MySQL as the database for a complex .Net project? Price is one factor we have identified, both in terms of the DB server licence as well as tools to manipulate the DB, but what other factors come into play?

  Read the article

• Override Java System.currentTimeMillis

  - by Mike Clark

  Is there a way, either in code or with JVM arguments, to override the current time, as presented via System.currentTimeMillis, other than manually changing the system clock on the host machine? A little background: We have a system that runs a number of accounting jobs that revolve much of their logic around the current date (ie 1st of the month, 1st of the year, etc) Unfortunately, a lot of the legacy code calls functions such as new Date() or Calendar.getInstance(), both of which eventually call down to System.currentTimeMillis. For testing purposes, right now, we are stuck with manually updating the system clock to manipulate what time and date the code thinks that the test is being run. So my question is: Is there a way to override what is returned by System.currentTimeMillis? For example, to tell the JVM to automatically add or subtract some offset before returning from that method? Thanks in advance!

  Read the article

• update columns when value is numeric in tsql

  - by knittl

  i want to normalize date fields from an old badly designed db dump. i now need to update every row, where the datefield only contains the year. update table set date = '01.01.' + date where date like '____' and isnumeric(date) = 1 and date >= 1950 but this will not work, because sql does not do short circuit evaluation of boolean expressions. thus i get an error "error converting nvarchar '01.07.1989' to int" is there a way to work around this? the column also contains strings with a length of 4, which are not numbers (????, 5/96, 70/8, etc.) the table only has 60000 rows

  Read the article

• Python / Django : emulating a multidimensional layer on a MySQL database

  - by Sébastien Piquemal

  Hi, I'm working on a Django project where I need to provide a lot of different visualizations on the same data (for example average of a value for each month, for each year / for a location, etc...). I have been using an OLAP database once in college, and I thought that it would fit my needs, but it appears that it is much too heavy for what I need. Actually the volume of data is not very big, so I don't need any optimization, just a way to present different visualizations of the same data without having to write 1000 times the same code. So, to recap, I need a python library: to emulate a multidimensional database (OLAP style would be nice because I think it is quite convenient : star structure, and everything) non-intrusive, because I can't modify anything on the existing MySQL database easy-to-use, because otherwise there's no point in replacing some overhead by another.

  Read the article

• How many records can i store in a Sql server table before it's getting ugly?

  - by Michel

  Hi, i've been asked to do some performance tests for a new system. It is only just running with a few client, but as they expect to grow, these are the numbers i work with for my test: 200 clients, 4 years of data, and the data changes per.... 5 minutes. So for every 5 minutes for every client there is 1 record. That means 365*24*12 = 105.000 records per client per year, that means 80 milion records for my test. It has one FK to another table, one PK (uniqueidentifier) and one index on the clientID. Is this something SqlServer laughs about because it isn't scaring him, is this getting too much for one quad core 8 GB machine, is this on the edge, or..... Has anybody had any experience with these kind of numbers?

  Read the article

< Previous Page | 241 242 243 244 245 246 247 248 249 250 251 252  | Next Page >