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  • Is MEF an all-or-nothing affair?

    - by Dave
    I've had a few questions about MEF recently, but here's the big one -- is it really all-or-nothing, as it appears to be? My basic application structure is simply an app, several shared libraries that are intended to be singletons, and several different plugins (which may implement different interfaces). The app loads the plugins, and both the app and all plugins need to access the shared libraries. My first go at MEF was fairly successful, although I made some stupid mistakes along the way because I was trying so many different things, I just got confused at times. But in the end, last night I got my smallish test app running with MEF, some shared libraries, and one plugin. Now I'm moving onto the target app, which I already described. And it's the multiple plugins part that has be a bit worried. My existing application already supports multiple plugins with different interfaces by using Reflection. I need to be able to uniquely identify each plugin so that the user can select one and get the expected behavior exposed by that plugin. The problem is that I don't know how to do this yet... but that's the topic of a different question. Ideally, I'd be able to take my existing plugin loader and use it as-is, while relying on MEF to do the shared library resolution. The problem is, I can't seem to get MEF to load them (i.e. I get a CompositionException when calling ComposeParts()) unless I also use MEF to load the plugin. And if I do this, well... then I need to know how to keep track of them as they get loaded so the user can select one from a list of plugins. What have your experiences been with trying to mix and match these approaches?

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  • Remove/squash entries in a vertical hash

    - by Forkrul Assail
    I have a grid that represents an X, Y matrix, stored as a hash here. Some points on the X Y matrix may have values (as type string), and some may not. A typical grid could look like this: {[9, 5]=>"Alaina", [10, 3]=>"Courtney", [11, 1]=>"Gladys", [8, 7]=>"Alford", [14, 11]=>"Lesley", [17, 2]=>"Lawson", [0, 5]=>"Katrine", [2, 1]=>"Tyra", [3, 3]=>"Fredy", [1, 7]=>"Magnus", [6, 9]=>"Nels", [7, 11]=>"Kylie", [11, 0]=>"Kellen", [10, 2]=>"Johan", [14, 10]=>"Justice", [0, 4]=>"Barton", [2, 0]=>"Charley", [3, 2]=>"Magnolia", [1, 6]=>"Maximo", [7, 10]=>"Olga", [19, 5]=>"Isadore", [16, 3]=>"Delfina", [17, 1]=>"Noe", [20, 11]=>"Francis", [10, 5]=>"Creola", [9, 3]=>"Bulah", [8, 1]=>"Lempi", [11, 7]=>"Raquel", [13, 11]=>"Jace", [1, 5]=>"Garth", [3, 1]=>"Ernest", [2, 3]=>"Malcolm", [0, 7]=>"Alejandrin", [7, 9]=>"Marina", [6, 11]=>"Otilia", [16, 2]=>"Hailey", [20, 10]=>"Brandt", [8, 0]=>"Madeline", [9, 2]=>"Leanne", [13, 10]=>"Jenifer", [1, 4]=>"Humberto", [3, 0]=>"Nicholaus", [2, 2]=>"Nadia", [0, 6]=>"Abigail", [6, 10]=>"Zola", [20, 5]=>"Clementina", [23, 3]=>"Alvah", [19, 11]=>"Wallace", [11, 5]=>"Tracey", [8, 3]=>"Hulda", [9, 1]=>"Jedidiah", [10, 7]=>"Annetta", [12, 11]=>"Nicole", [2, 5]=>"Alison", [0, 1]=>"Wilma", [1, 3]=>"Shana", [3, 7]=>"Judd", [4, 9]=>"Lucio", [5, 11]=>"Hardy", [19, 10]=>"Immanuel", [9, 0]=>"Uriel", [8, 2]=>"Milton", [12, 10]=>"Elody", [5, 10]=>"Alexanne", [1, 2]=>"Lauretta", [0, 0]=>"Louvenia", [2, 4]=>"Adelia", [21, 5]=>"Erling", [18, 11]=>"Corene", [22, 3]=>"Haskell", [11, 11]=>"Leta", [10, 9]=>"Terrence", [14, 1]=>"Giuseppe", [15, 3]=>"Silas", [12, 5]=>"Johnnie", [4, 11]=>"Aurelie", [5, 9]=>"Meggie", [2, 7]=>"Phoebe", [0, 3]=>"Sister", [1, 1]=>"Violet", [3, 5]=>"Lilian", [18, 10]=>"Eusebio", [11, 10]=>"Emma", [15, 2]=>"Theodore", [14, 0]=>"Cassidy", [4, 10]=>"Edmund", [2, 6]=>"Claire", [0, 2]=>"Madisen", [1, 0]=>"Kasey", [3, 4]=>"Elijah", [17, 11]=>"Susana", [20, 1]=>"Nicklaus", [21, 3]=>"Kelsie", [10, 11]=>"Garnett", [11, 9]=>"Emanuel", [15, 1]=>"Louvenia", [14, 3]=>"Otho", [13, 5]=>"Vincenza", [3, 11]=>"Tate", [2, 9]=>"Beau", [5, 7]=>"Jason", [6, 1]=>"Jayde", [7, 3]=>"Lamont", [4, 5]=>"Curt", [17, 10]=>"Mack", [21, 2]=>"Lilyan", [10, 10]=>"Ruthe", [14, 2]=>"Georgianna", [4, 4]=>"Nyasia", [6, 0]=>"Sadie", [16, 11]=>"Emil", [21, 1]=>"Melba", [20, 3]=>"Delia", [3, 10]=>"Rosalee", [2, 8]=>"Myrtle", [7, 2]=>"Rigoberto", [14, 5]=>"Jedidiah", [13, 3]=>"Flavie", [12, 1]=>"Evie", [8, 9]=>"Olaf", [9, 11]=>"Stan", [20, 2]=>"Judge", [5, 5]=>"Cassie", [7, 1]=>"Gracie", [6, 3]=>"Armando", [4, 7]=>"Delia", [3, 9]=>"Marley", [16, 10]=>"Robyn", [2, 11]=>"Richie", [12, 0]=>"Gilberto", [13, 2]=>"Dedrick", [9, 10]=>"Liam", [5, 4]=>"Jabari", [7, 0]=>"Enola", [6, 2]=>"Lela", [3, 8]=>"Jade", [2, 10]=>"Johnson", [15, 5]=>"Willow", [12, 3]=>"Fredrick", [13, 1]=>"Beau", [9, 9]=>"Carlie", [8, 11]=>"Daisha", [6, 5]=>"Declan", [4, 1]=>"Carolina", [5, 3]=>"Cruz", [7, 7]=>"Jaime", [0, 9]=>"Anthony", [1, 11]=>"Esta", [13, 0]=>"Shaina", [12, 2]=>"Alec", [8, 10]=>"Lora", [6, 4]=>"Emely", [4, 0]=>"Rodger", [5, 2]=>"Cedrick", [0, 8]=>"Collin", [1, 10]=>"Armani", [16, 5]=>"Brooks", [19, 3]=>"Eleanora", [18, 1]=>"Alva", [7, 5]=>"Melissa", [5, 1]=>"Tabitha", [4, 3]=>"Aniya", [6, 7]=>"Marc", [1, 9]=>"Marjorie", [0, 11]=>"Arvilla", [19, 2]=>"Adela", [7, 4]=>"Zakary", [5, 0]=>"Emely", [4, 2]=>"Alison", [1, 8]=>"Lorenz", [0, 10]=>"Lisandro", [17, 5]=>"Aylin", [18, 3]=>"Giles", [19, 1]=>"Kyleigh", [8, 5]=>"Mary", [11, 3]=>"Claire", [10, 1]=>"Avis", [9, 7]=>"Manuela", [15, 11]=>"Chesley", [18, 2]=>"Kristopher", [24, 3]=>"Zola", [8, 4]=>"Pietro", [10, 0]=>"Delores", [11, 2]=>"Timmy", [15, 10]=>"Khalil", [18, 5]=>"Trudie", [17, 3]=>"Rafael", [16, 1]=>"Anthony"} What I need to do though, is basically remove all the empty entries. Let's say [17,3] = Raphael does not have an element in front of if (let's say - no [16,3] exists) then [17,3] should become [16,3] etc. So basically all empty items will be popped off the vertical (row) structure of the hash. Are there functions I should have a look at or is there an easy squash-like method that would just remove blanks and adjust and move other items? Thanks in advance for your help.

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  • ASP.Net: Writing chunks of file..HTTP File upload with resume..

    - by Manish
    Please refer to question: http://stackoverflow.com/questions/2062852/resume-in-upload-file-control Now to find a solution for the above question, I want to work on it and develop a user control which can resume a HTTP File Upload process. For this, I'm going to create a temporary file on server until the upload is complete. Once the uploading is done completely then will just save it to the desired location. The procedure I have thought of is: Create a temporary file with a unique name (may be GUID) on the server. Read a chunk of file and append it to this temp file on the server. Continue step 1 to 3 until EOF is reached. Now if the connection is lost or user clicks on pause button, the writing of file is stopped and the temporary file is not deleted. Clicking on resume again or uploading the same file again will check on the server if the file exists and user whether to resume or to overwrite. (Not sure how to check if it's the same file. Also, how to step sending the chunks from client to server.) Clicking on resume will start from where it is required to be uploaded and will append that to the file on the server. (Again not sure how to do this.) Questions: Are these steps correct to achieve the goal? Or need some modifications? I'm not sure how to implement all these steps. :-( Need ideas, links... Any help appreciated...

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  • Enum "does not have a no-arg default constructor" with Jaxb and cxf

    - by Dave
    A client is having an issue running java2ws on some of their code, which uses & extends classes that are consumed from my SOAP web services. Confused yet? :) I'm exposing a SOAP web service (JBoss5, Java 6). Someone is consuming that web service with Axis1 and creating a jar out of it with the data types and client stubs. They are then defining their own type, which extends one of my types. My type contains an enumeration. class MyParent { private MyEnumType myEnum; // getters, settters for myEnum; } class TheirChild extends MyParent { ... } When they are running java2ws on their code (which extends my class), they get Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 2 counts of IllegalAnnotationExceptions net.foo.bar.MyEnuMType does not have a no-arg default constructor. this problem is related to the following location: at net.foo.bar.MyEnumType at public net.foo.bar.MyEnumType net.foo.bar.MyParent.getMyEnum() The enum I've defined is below. This is now how it comes out after being consumed, but it's how I have it defined on the app server: @XmlType(name = "MyEnumType") @XmlEnum public enum MyEnumType { Val1("Val1"), Val2("Val2") private final String value; MyEnumType(String v) { value = v; } public String value() { return value; } public static MyEnumType fromValue(String v) { if (v == null || v.length() == 0) { return null; } if (v.equals("Val1")) { return MyEnumType.Val1; } if (v.equals("Val2")) { return MyEnumType.Val2; } return null; } } I've seen things online and other posts, like (this one) regarding Jaxb's inability to handle Lists or things like that, but I'm baffled about my enum. I'm pretty sure you can't have a default constructor for an enum (well, at least a public no-arg constructor, Java yells at me when I try), so I'm not sure what makes this error possible. Any ideas? Also, the "2 counts of IllegalAnnotationsExceptions" may be because my code actually has two enums that are written similarly, but I left them out of this example for brevity.

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  • Do I really need an ORM?

    - by alchemical
    We're about to begin development on a mid-size ASP.Net MVC 2 web site. For a typical page, we grab data and throw it up on the web page, i.e. there is not much pre-processing of the data before it is sent to the UI. We're now making the decision whether or not to use an ORM and if yes, which one. We had been looking at EF2 AKA EF4 (ASP.Net Entity Framework in VS 2010) as one possibility. However, I'm thinking a simple solution in this case may be just to use datatables. The reason being that we don't plan to move the data around or process it a lot once we fetch it, so I'm not sure there is that much value in having strongly-typed objects as DTOs. Also, this way we avoid mapping altogether, thereby I think simplifying the code and allowing for faster development. I should mention budget is an issue on this project, as well as speed of execution. We are striving for simplicity anywhere we can, both to keep the budget smaller, the schedule shorter, and performance fast. We haven't fully decided this yet, but are currently leaning towards no ORM. Will we be OK with the no ORM approach or is an ORM worth it?

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  • Jquery and XML - How to add the value of nodes

    - by Matias
    Hi Experts, This may be a simple question though can´t figure out how to do it. I am parsing an XML with Jquery Ajax. It contains dates and rates The XML looks something like <rate> <date>Today</date> <price>66</price> </rate> <rate> <date>Tomorrow</date> <price>99</price> </rate> I simply want to figure out how to calculate the total price of both days Today and Tomorrow. Thought that by using Javascript Number it will simply return the total value of the nodes.. $(xml).find("rate").each(function() { $(this).find("price").each(function() { $("#TOTALPRICE").append(Number($(this).text())); } } //output is: 6699 However, it´s just concatenating the values both not adding them. //output is: 6699 I greatly appreciate your help !! Thanks

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  • Optimizing Levenshtein Distance Algorithm

    - by Matt
    I have a stored procedure that uses Levenshtein Distance to determine the result closest to what the user typed. The only thing really affecting the speed is the function that calculates the Levenshtein Distance for all the records before selecting the record with the lowest distance (I've verified this by putting a 0 in place of the call to the Levenshtein function). The table has 1.5 million records, so even the slightest adjustment may shave off a few seconds. Right now the entire thing runs over 10 minutes. Here's the method I'm using: ALTER function dbo.Levenshtein ( @Source nvarchar(200), @Target nvarchar(200) ) RETURNS int AS BEGIN DECLARE @Source_len int, @Target_len int, @i int, @j int, @Source_char nchar, @Dist int, @Dist_temp int, @Distv0 varbinary(8000), @Distv1 varbinary(8000) SELECT @Source_len = LEN(@Source), @Target_len = LEN(@Target), @Distv1 = 0x0000, @j = 1, @i = 1, @Dist = 0 WHILE @j <= @Target_len BEGIN SELECT @Distv1 = @Distv1 + CAST(@j AS binary(2)), @j = @j + 1 END WHILE @i <= @Source_len BEGIN SELECT @Source_char = SUBSTRING(@Source, @i, 1), @Dist = @i, @Distv0 = CAST(@i AS binary(2)), @j = 1 WHILE @j <= @Target_len BEGIN SET @Dist = @Dist + 1 SET @Dist_temp = CAST(SUBSTRING(@Distv1, @j+@j-1, 2) AS int) + CASE WHEN @Source_char = SUBSTRING(@Target, @j, 1) THEN 0 ELSE 1 END IF @Dist > @Dist_temp BEGIN SET @Dist = @Dist_temp END SET @Dist_temp = CAST(SUBSTRING(@Distv1, @j+@j+1, 2) AS int)+1 IF @Dist > @Dist_temp SET @Dist = @Dist_temp BEGIN SELECT @Distv0 = @Distv0 + CAST(@Dist AS binary(2)), @j = @j + 1 END END SELECT @Distv1 = @Distv0, @i = @i + 1 END RETURN @Dist END Anyone have any ideas? Any input is appreciated. Thanks, Matt

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  • Problem with DOMPDF and Kohana 3

    - by alex
    I have used DOMPDF many times before successfully, however outside of the Kohana Framework. I created a module for DOMPDF and called it simply pdf. Here is it's code. class Pdf { private $domPdfInstance; public function __construct($html) { if ( ! class_exists('DOMPDF', FALSE)) { // Load DOMPDF require Kohana::find_file('vendor', 'dompdf/dompdf_config.inc'); } $this->domPdfInstance = new DOMPDF; $this->domPdfInstance->load_html($html); } public function render() { $this->domPdfInstance->render(); return $this; } public function stream($filename) { if (pathinfo($filename, PATHINFO_EXTENSION) !== 'pdf') { $filename .= '.pdf'; } $this->domPdfInstance->stream($filename); return $this; } } For some reason, any PDF I generate using this results in it being corrupt (not opening under Mac OS X's Preview app at least). I have even tried this basic HTML <html> <head> <title>PDF</title> </head> <body> please work </body> </html> Is this a known problem? I have not touched anything in dompdf_config.inc.php except uncomment out the error reporting levels so they now read error_reporting(E_STRICT | E_ALL); PHP is not reporting any errors. Here is a screenshot of the error from Preview (though I think it's probably unhelpful) Some thing I have thought may be a problem Auto loading conflicts Base path conflicts

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  • ADODB Connection String: Workgroup Information file is Missing?

    - by Mohgeroth
    I have a few data sources in access that I need to connect to programatically to do things with behind the scenes and keep visibility away from users. Said datasource has a password 'pass' as I'm going to call it here. Using this connection method I get an error attempting to use the open method Dim conn as ADODB.Connection Set ROBBERS.conn = New ADODB.Connection conn.open "Provider=Microsoft.Jet.OLEDB.4.0;" _ & "Data Source=\\pep-home\projects\billing\autobilling\DPBilling2.mdb;" _ & "Jet OLEDB:Database Password=pass;", "admin", "pass" "Cannot start your application. The workgroup information file is missing or opened exclusively by another user." Due to planning to move into 2007, we are not using nor have ever used a workgroup identification file through access. The database password on the data source was set through the Set Databa Password which had to be done on an exclusive open. Ive spent a good while changing around my connection options, where to put the passwords etc and either cannot find the right format, or (why I'm asking here) I think there may be some other unknown that I must setup to do this. Anyone out there got some useful information?

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  • Using SQL Alchemy and pyodbc with IronPython 2.6.1

    - by beargle
    I'm using IronPython and the clr module to retrieve SQL Server information via SMO. I'd like to retrieve/store this data in a SQL Server database using SQL Alchemy, but am having some trouble loading the pyodbc module. Here's the setup: IronPython 2.6.1 (installed at D:\Program Files\IronPython) CPython 2.6.5 (installed at D:\Python26) SQL Alchemy 0.6.1 (installed at D:\Python26\Lib\site-packages\sqlalchemy) pyodbc 2.1.7 (installed at D:\Python26\Lib\site-packages) I have these entries in the IronPython site.py to import CPython standard and third-party libraries: # Add CPython standard libs and DLLs import sys sys.path.append(r"D:\Python26\Lib") sys.path.append(r"D:\Python26\DLLs") sys.path.append(r"D:\Python26\lib-tk") sys.path.append(r"D:\Python26") # Add CPython third-party libs sys.path.append(r"D:\Python26\Lib\site-packages") # sqlite3 sys.path.append(r"D:\Python26\Lib\sqlite3") # Add SQL Server SMO sys.path.append(r"D:\Program Files\Microsoft SQL Server\100\SDK\Assemblies") import clr clr.AddReferenceToFile('Microsoft.SqlServer.Smo.dll') clr.AddReferenceToFile('Microsoft.SqlServer.SqlEnum.dll') clr.AddReferenceToFile('Microsoft.SqlServer.ConnectionInfo.dll') SQL Alchemy imports OK in IronPython, put I receive this error message when trying to connect to SQL Server: IronPython 2.6.1 (2.6.10920.0) on .NET 2.0.50727.3607 Type "help", "copyright", "credits" or "license" for more information. >>> import sqlalchemy >>> e = sqlalchemy.MetaData("mssql://") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "D:\Python26\Lib\site-packages\sqlalchemy\schema.py", line 1780, in __init__ File "D:\Python26\Lib\site-packages\sqlalchemy\schema.py", line 1828, in _bind_to File "D:\Python26\Lib\site-packages\sqlalchemy\engine\__init__.py", line 241, in create_engine File "D:\Python26\Lib\site-packages\sqlalchemy\engine\strategies.py", line 60, in create File "D:\Python26\Lib\site-packages\sqlalchemy\connectors\pyodbc.py", line 29, in dbapi ImportError: No module named pyodbc This code works just fine in CPython, but it looks like the pyodbc module isn't accessible from IronPython. Any suggestions? I realize that this may not be the best way to approach the problem, so I'm open to tackling this a different way. Just wanted to get some experience with using SQL Alchemy and pyodbc.

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  • Forcing an item to remain in place in a jQuery UI Sortable list

    - by calumbrodie
    I've set up a jQuery sortable list but I need to be able to keep some items in the sortable 'fixed' in place and for the other items to sort around them. I thought that there would be built in methods to achieve this, alas this is not the case. I'm able to set up the list and not include the items in question: <ul id="fruit"> <li class="fixed">apples</li> <li>oranges</li> <li>bananas</li> <li>pineapples</li> <li>grapes</li> <li class="fixed">pears</li> <li>mango</li> </ul> <script type="text/javascript"> $('#fruit').sortable({items: "li:not('.fixed')"}) </script> This stops me from drag/dropping these items but they still move if the items around them are sorted. There may be a way to do this using the many callbacks that this method has but I've been unable to work this out. Maybe this method would be a good addition to the UI Sortable options?

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  • SQL statement with datetimepicker

    - by David Archer
    This should hopefully be a simple one. When using a date time picker in a windows form, I want an SQL statement to be carried out, like so: string sql = "SELECT * FROM Jobs WHERE JobDate = '" + dtpJobDate.Text + "'"; Unfortunately, this doesn't actually provide any results because the JobDate field is stored as a DateTime value. I'd like to be able to search for all records that are on this date, no matter what the time stored may be, any help? New query: SqlDataAdapter da2 = new SqlDataAdapter(); SqlCommand cmd = new SqlCommand(); cmd.CommandText = "SELECT * FROM Jobs WHERE JobDate >= @p_StartDate AND JobDate < @p_EndDate"; cmd.Parameters.Add ("@p_StartDate", SqlDbType.DateTime).Value = dtpJobDate.Value.Date; cmd.Parameters.Add ("@p_EndDate", SqlDbType.DateTime).Value = dtpJobDate.Value.Date.AddDays(1); cmd.Connection = conn; da2.SelectCommand = cmd; da2.Fill(dt); dgvJobDiary.DataSource = dt; Huge thanks for all the help!

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  • Any way for a class to prevent outside code from declaring variables of its type?

    - by supercat
    Is it possible for a class of exposing a type for function returns, without allowing users of that class to create variables of that type? A couple usage scenarios: A Fluent interface on a large class; a statement like "foo=bar.WithX(5).WithY(9).WithZ(19);" would be inefficient if it had to create three new instances of the class, but could be much more efficient if the WithX could create one instance, and the other statements could simply use it. A class may wish to support a statement like "foo[19].x = 9;" even when foo itself isn't an array, and does not hold the data in class instances that can be exposed to the public; one way to do that is to have foo[19] return a struct which holds a reference to 'foo' and the value '19', and has a member property 'x' which could call "foo.SetXValue(19, 9);" Such a struct could have a conversion operator to convert itself to the "apparent" type of foo[19]. In both of these scenarios, storing the value returned by a method or property into a variable and then using it more than once would cause strange behavior. It would be desirable if the designer of the class exposing such methods or properties could ensure that callers wouldn't be able to use them more than once. Is there any practical way to accomplish that?

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  • WPF Background Thread Invocation

    - by jeffn825
    Maybe I'm mis-remembering how Winforms works or I'm overcomplicating the hell out of this, but here's my problem. I have a WPF client app application that talks to a server over WCF. The current user may "log out" of the WPF client, which closes all open screens, leaves only the navigation pane, and minimizes the program window. When the user re-maximizes the program window, they are prompted to log in. Simple. But sometimes things happen on background threads - like every 5 minutes the client tries to make a WCF calls that refreshes some cached data. And what if the user is logged out when this 5 minute timer triggers? Well, then the user should be prompted to log back in...and this must of course happen on the UI thread. private static ISecurityContext securityContext; public static ISecurityContext SecurityContext { get { if (securityContext == null) { // Login method shows a window and prompts the user to log in Application.Current.Dispatcher.Invoke((Action)Login); } return securityContext; } } So far so good, right? But what happens when multiple threads hit this spot of code? Well, my first intuition was that since I'm syncrhonizing across the Application.Current.Dispatcher, I should be fine, and whichever thread hit first would be responsible for showing the login form and getting the user logged in... Not the case... Thread 1 will hit the code and call ShowDialog on the login form Thread 2 will also hit the code and will call Login as soon as Thread 1 has called ShowDialog, since calling ShowDialog unblocked Thread 1 (I believe because of the way the WPF message pump works) All I want is a synchronized way of getting the user logged back into the application...what am I missing here? Thanks in advance.

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  • no pg_hba.conf entry for host

    - by Priya
    Hi All I am new to Perl as well as Postgresql I get following error when i try to connect using DBI DBI connect('database=chaosLRdb;host=192.168.0.1;port=5433','postgres',...) failed: FATAL: no pg_hba.conf entry for host "192.168.0.1", user "postgres", database "chaosLRdb", SSL off Here is my pg_hba.conf file: # "local" is for Unix domain socket connections only local all all md5 # IPv4 local connections: host all all 127.0.0.1/32 md5 # IPv6 local connections: host all all ::1/128 md5 host all postgres 127.0.0.1/32 trust host all postgres 192.168.0.1/32 trust host all all 192.168.0.1/32 trust host all all 192.168.0.1/128 trust host all all 192.168.0.1/32 md5 host chaosLRdb postgres 192.168.0.1/32 md5 local all all 192.168.0.1/32 trust My perl code is #!/usr/bin/perl-w use DBI; use FileHandle; print "Start connecting to the DB...\n"; @ary = DBI->available_drivers(true); %drivers = DBI->installed_drivers(); my $dbh = DBI->connect("DBI:PgPP:database=chaosLRdb;host=192.168.0.1;port=5433", "postgres", "chaos123"); May I know what i miss here?

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  • fluent nhibernate select n+1 problem

    - by Andrew Bullock
    I have a fairly deep object graph (5-6 nodes), and as I traverse portions of it NHProf is telling me I've got a "Select N+1" problem (which I do). The two solutions I'm aware of are Eager load children Break apart my object graph (and eager load) I don't really want to do either of these (although I may break the graph apart later as I forsee it growing) For now.... Is it possible to tell NHibernate (with fluentnhib) that whenever i try to access children, to load them all in one go, instead of selectn+1ing as i iterate over them? I'm also getting "unbounded results set"s, which is presumably the same problem (or rather, will be solved by the above solution if possible). Each child collection (throughout the graph) will only ever have about 20 members, but 20^5 is a lot, so i dont want to eager load everything when i get the root, but simply get all of a child collection whenever i go near it Edit: an afterthought.... what if i want to introduce paging when i want to render children? do i HAVE to break my object graph here, or is there some sneakyness i can employ to solve all these issues?

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  • C# and F# lambda expressions code generation

    - by ControlFlow
    Let's look at the code, generated by F# for simple function: let map_add valueToAdd xs = xs |> Seq.map (fun x -> x + valueToAdd) The generated code for lambda expression (instance of F# functional value) will looks like this: [Serializable] internal class map_add@3 : FSharpFunc<int, int> { public int valueToAdd; internal map_add@3(int valueToAdd) { this.valueToAdd = valueToAdd; } public override int Invoke(int x) { return (x + this.valueToAdd); } } And look at nearly the same C# code: using System.Collections.Generic; using System.Linq; static class Program { static IEnumerable<int> SelectAdd(IEnumerable<int> source, int valueToAdd) { return source.Select(x => x + valueToAdd); } } And the generated code for the C# lambda expression: [CompilerGenerated] private sealed class <>c__DisplayClass1 { public int valueToAdd; public int <SelectAdd>b__0(int x) { return (x + this.valueToAdd); } } So I have some questions: Why does F#-generated class is not marked as sealed? Why does F#-generated class contains public fields since F# doesn't allows mutable closures? Why does F# generated class has the constructor? It may be perfectly initialized with the public fields... Why does C#-generated class is not marked as [Serializable]? Also classes generated for F# sequence expressions are also became [Serializable] and classes for C# iterators are not.

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  • iPhone SDK: Memory leak on picker

    - by bbftsoftware
    I have created a picker for my users to pick from a list of countries. The problem is that repeated opening and closing of the picker is resulting in “EXC_BAD_ACCESS” error. I suspect it might be a memory leak but I am not sure. I was hoping someone could shed some insight into why this might be happening? //data source for UIPicker NSArray *arrayCountryChoices; arrayCountryChoices = [[NSArray alloc] initWithObjects:@"TK=TOKELAU", @"TJ=TAJIKISTAN", @"TH=THAILAND", @"TG=TOGO", @"TF=FRENCH SOUTHERN TERRITORIES", @"GY=GUYANA", @"TD=CHAD", nil]; //opening the picker CountryViewController *countryVC = [[CountryViewController alloc] initWithNibName:@"CountryView" bundle:nil]; countryVC.delegate = self; [self presentModalViewController:countryVC animated:YES]; [countryVC release]; //here is where I grab the data //close country selector [self dismissModalViewControllerAnimated:YES]; //parse out code NSString *strCode = [chosenCountry substringToIndex:2]; //set the gui txtCountry.text = strCode; I think it may be because I am trying to release the Country Selector before the delegate has a chance to get its data? Also I am wondring if I should not release the picker until the screen that calls it is released. Thanks in advance.

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  • UITableViewController not redrawing new cell text label after popViewControllerAnimated

    - by crunchyt
    I have a problemetic UITableViewController fails to redraw an updated cell after a child view is removed. Here's what's happening. After changing data in a child view, the parent view controller reloads the source data array and runs [tableView reloadData] via a PostNotification. After this triggers, I use popViewControllerAnimated to return to the parent UITableViewController (this pops the child view off the stack, and reveals the controller one level up). However, my updated data does not appear in the parent view controller! According to the debugger, the cell's label has been updated, but the visible label does not change. However, if I scroll-flick the table, momentarily moving the updated cell out of view, when it reappears the label is updated! I also try calling [tableView reloadData] via viewWillAppear but the issue still persists. Here is some additional info that may be helpful. I have a 3 views structured like this: 1/ SettingsViewController : UITableViewController 2/ -- UserView : UITableViewController 3/ ---- UserDetailsView : UIViewController <UIActionSheetDelegate> I am calling UserDetailsView from inside UserView as follows: UserDetailsView *userDetailsView = [[UserDetailsView alloc] init]; [self.navigationController pushViewController:userDetailsView animated:YES]; If I return to the top-most controller (SettingsViewController) and then load the problematic controller (UserView), everything is drawn correctly. It is only when returning from a child view that this issue occurs. Thank you in advance for your suggestions.

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  • Crosstab/Cube/Pivot Components for Delphi

    - by Anagoge
    I'm looking for a Delphi VCL crosstab/cube/pivotcube/olap grid component for Delphi 2009, 2010, or XE. I'm willing to sacrifice advanced features to get something open/free (or very cheap if I must) to make it easier to collaborate with any future developers without anyone having to purchase more components than I already use, since this will just be used in one screen. If there isn't anything appropriate out there, I may try to implement something simple on my own. I can live with some fairly basic features: drag and drop to configure dimensions, sort by a column, allow totals/min/max for a column, and (optionally) expand/collapse or drill down to sub-categories. Blazing performance and enterprise scalability are not required, since there should be less than 2000 source rows. There appear to be several decent options in the commercial space (ExpressPivotCube, FastCube, HierCube), but they are all a few hundred dollars. This project already uses existing installations of Excel 2007 and SQL Server 2005/2008, so I might consider leveraging those, though I'd prefer a native Delphi component, if possible. There are also the very old Decision Cube components included in Delphi's Source\xtab directory, but they apparently no longer support unicode compilers (Delphi 2009+), since I got dozens of unicode-related compilation errors while test compiling that source in Delphi XE. Those components also still link to the long-deprecated BDE! Has anyone modified Decision Cube to support unicode/pure-TDataSet? The online tutorials I found were incomplete and silent on the dozens of BDE/unicode compilation errors I see, so I might have to tackle that on my own. Does anyone have suggestions where to start for a free/cheap basic crosstab/pivot grid component?

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  • Don't Understand Sql Server Error

    - by Jonathan Wood
    I have a table of users (User), and need to create a new table to track which users have referred other users. So, basically, I'm creating a many-to-many relation between rows in the same table. So I'm trying to create table UserReferrals with the columns UserId and UserReferredId. I made both columns a compound primary key. And both columns are foreign keys that link to User.UserID. Since deleting a user should also delete the relationship, I set both foreign keys to cascade deletes. When the user is deleted, any related rows in UserReferrals should also delete. But this gives me the message: 'User' table saved successfully 'UserReferrals' table Unable to create relationship 'FK_UserReferrals_User'. Introducing FOREIGN KEY constraint 'FK_UserReferrals_User' on table 'UserReferrals' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints. Could not create constraint. See previous errors. I don't get this error. A cascading delete only deletes the row with the foreign key, right? So how can it cause "cycling cascade paths"? Thanks for any tips.

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  • How do I remove accents from characters in a PHP string?

    - by georgebrock
    I'm attempting to remove accents from characters in PHP string as the first step to making the string usable in a URL. I'm using the following code: $input = "Fóø Bår"; setlocale(LC_ALL, "en_US.utf8"); $output = iconv("utf-8", "ascii//TRANSLIT", $input); print($output); The output I would expect would be something like this: F'oo Bar However, instead of the accented characters being transliterated they are replaced with question marks: F?? B?r Everything I can find online indicates that setting the locale will fix this problem, however I'm already doing this. I've already checked the following details: The locale I am setting is supported by the server (included in the list produced by locale -a) The source and target encodings (UTF-8 and ASCII) are supported by the server's version of iconv (included in the list produced by iconv -l) The input string is UTF-8 encoded (verified using PHP's mb_check_encoding function, as suggested in the answer by mercator) The call to setlocale is successful (it returns 'en_US.utf8' rather than FALSE) The cause of the problem: The server is using the wrong implementation of iconv. It has the glibc version instead of the required libiconv version. Note that the iconv function on some systems may not work as you expect. In such case, it'd be a good idea to install the GNU libiconv library. It will most likely end up with more consistent results. – PHP manual's introduction to iconv Details about the iconv implementation that is used by PHP are included in the output of the phpinfo function. (I'm not able to re-compile PHP with the correct iconv library on the server I'm working with for this project so the answer I've accepted below is the one that was most useful for removing accents without iconv support.)

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  • C# File IO with Streams - Best Memory Buffer Size

    - by AJ
    Hi, I am writing a small IO library to assist with a larger (hobby) project. A part of this library performs various functions on a file, which is read / written via the FileStream object. On each StreamReader.Read(...) pass, I fire off an event which will be used in the main app to display progress information. The processing that goes on in the loop is vaired, but is not too time consuming (it could just be a simple file copy, for example, or may involve encryption...). My main question is: What is the best memory buffer size to use? Thinking about physical disk layouts, I could pick 2k, which would cover a CD sector size and is a nice multiple of a 512 byte hard disk sector. Higher up the abstraction tree, you could go for a larger buffer which could read an entire FAT cluster at a time. I realise with today's PC's, I could go for a more memory hungry option (a couple of MiB, for example), but then I increase the time between UI updates and the user perceives a less responsive app. As an aside, I'm eventually hoping to provide a similar interface to files hosted on FTP / HTTP servers (over a local network / fastish DSL). What would be the best memory buffer size for those (again, a "best-case" tradeoff between perceived responsiveness vs. performance). Thanks in advance for any ideas, Adam

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  • Get more debug info from AxHost?

    - by Presidenten
    Hello I'm trying to deploy an application which uses an library that embeds an ActiveX control with AxHost in C#. When I run the installed app on our test rig I catch and present the following exception: Unexpected exception. This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1) at System.Windows.Forms.UnsafeNativeMethods.CoCreateInstance(Guid& clsid, Object punkOuter, Int32 context, Guid& iid) at System.Windows.Forms.AxHost.CreateWithoutLicense(Guid clsid) at System.Windows.Forms.AxHost.CreateWithLicense(String license, Guid clsid) at System.Windows.Forms.AxHost.CreateInstanceCore(Guid clsid) at System.Windows.Forms.AxHost.CreateInstance() at System.Windows.Forms.AxHost.GetOcxCreate() at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state) at System.Windows.Forms.AxHost.CreateHandle() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.AxHost.EndInit() at ....InitializeComponent() at ... I googled 0x800736B1, so I know that it means that a file could not be loaded. The big Q right now is how to find out which file it is that cant be loaded. Is there some sort of logging function I can turn on, or is there maybe som way I can get more info from the exception?

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  • .NET projects build automation with NAnt/MSBuild + SVN

    - by petr k.
    Hi everyone, for quite a while now, I've been trying to figure out how to setup an automated build process at our shop. I've read many posts and guides on this matter and none of them really fits my specifics needs. My SVN repository is laid out as follows \projects \projectA (a product) \tags \1.0.0.1 \1.0.0.2 ... \trunk \src \proj1 (a VS C# project) \proj2 \documentation Then I have a network share, with a folder for each project (product), which in turn contains the binaries, written documentation and the generated API documentation (via NDoc - each project may have an .ndoc file in the repository) for every historical version (from the tags SVN folder) and for the latest version as well (from the trunk). Basically, what I want to do in a scheduled batch build are these steps: examine the project's SVN folder and identify tags not present in the network share for each of these tags check out the tag folder build (with Release config) copy the resulting binaries to the network share search for .ndoc files generate CHM files via NDoc copy the resulting CHM files to the network share do the same as in 2., but for the HEAD revision of trunk Now, the trouble is, I have no idea where to start. I do not keep .sln files in the repository, but I am able to replace these with MSBuild files which in turn build the C# projects belonging to the specific product. I guess the most troubling part is the examination of the repository for tags which have not been processed yet - i.e. searching the tags and comparing them to a project's directory structure on the network share. I have no idea how to do that in any of the build tools (NAnt, MSBuild). Could you please provide me with some pointers on how to approach this task as a whole and in detail as well? I do not care if I use NAnt, MSBuild, or both. I am aware that this might be rather complex, but every idea and NAnt/MSBuild snippet will be a great help. Thanks in advance.

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