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  • dump csv from sqlalchemy

    - by afilatun
    For some reason, I want to dump a table from a database (sqlite3) in the form of a csv file. I'm using a python script with elixir (based on sqlalchemy) to modify the database. I was wondering if there is any way to dump the table I use to csv. I've seen sqlalchemy serializer but it doesn't seem to be what I want. Am I doing it wrong? Should I call the sqlite3 python module after closing my sqlalchemy session to dump to a file instead? Or should I use something homemade?

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  • Placing & deleting element(s) from a object (stack)

    - by Chris
    Hello, Initialising 2 stack objects: Stack s1 = new Stack(), s2 = new Stack(); s1 = 0 0 0 0 0 0 0 0 0 0 (array of 10 elements wich is empty to start with) top:0 const int Rows = 10; int[] Table = new int[Rows]; public void TableStack(int[] Table) { for (int i=0; i < Table.Length; i++) { } } My question is how exactly do i place a element on a stack (push) or take a element from the stack (pop) as the following: Push: s1.Push(5); // s1 = 5 0 0 0 0 0 0 0 0 0 (top:1) s1.Push(9); // s1 = 5 9 0 0 0 0 0 0 0 0 (top:2) Pop: int number = s1.Pop(); // s1 = 5 0 0 0 0 0 0 0 0 0 0 (top:1) 9 got removed Do i have to use get & set, and if so how exactly do i implent this with a array? Not really sure what to exactly use for this. Any hints highly appreciated. The program uses the following driver to test the Stack class (wich cannot be changed or modified): public void ExecuteProgram() { Console.Title = "StackDemo"; Stack s1 = new Stack(), s2 = new Stack(); ShowStack(s1, "s1"); ShowStack(s2, "s2"); Console.WriteLine(); int getal = TryPop(s1); ShowStack(s1, "s1"); TryPush(s2, 17); ShowStack(s2, "s2"); TryPush(s2, -8); ShowStack(s2, "s2"); TryPush(s2, 59); ShowStack(s2, "s2"); Console.WriteLine(); for (int i = 1; i <= 3; i++) { TryPush(s1, 2 * i); ShowStack(s1, "s1"); } Console.WriteLine(); for (int i = 1; i <= 3; i++) { TryPush(s2, i * i); ShowStack(s2, "s2"); } Console.WriteLine(); for (int i = 1; i <= 6; i++) { getal = TryPop(s2); //use number ShowStack(s2, "s2"); } }/*ExecuteProgram*/ Regards.

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  • how to convert Database Hierarchical Data to XML using ASP.net 3.5 and LINQ

    - by mahdiahmadirad
    hello guys! i have a table with hierarchical structure. like this: and table data shown here: this strategy gives me the ability to have unbounded categories and sub-categories. i use ASP.net 3.5 SP1 and LINQ and MSSQL Server2005. How to convert it to XML? I can Do it with Dataset Object and ".GetXML()" method. but how to implement it with LINQtoSQL or LINQtoXML??? or if there is another simpler way to perform that? what is your suggestion? the best way? I searched the web but found nothing for .net 3.5 featuers.

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  • Allow swipe-to-delete in one instance of UITableViewDataSource, but not another

    - by synic
    I've got a UITableViewDataSource that I'm using for two different UITableViews. In one of the table views, I want to enable swipe-to-delete, so I've implemented tableView:commitEditingStyle:forRowAtIndexPath, and it works as expected. However, in another table, I want to disable that feature. I've got it working by making two UITableViewDataSource classes, one subclassing the other, and I only implement tableView:commitEditingStyle:forRowAtIndexPath in the subclass. I call them RecipientModel and RecipientModelEditable. I'm wondering if there's a better way.

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  • Some basic COM question...

    - by smwikipedia
    I have just finished my first COM server DLL. And it runs smoothly. So I'd like to show my understanding for now and hear your critics. 1- How COM simply works? COM - "The Call Chain" COM Lib methods - Traditional DLL exports - Classes encapsulated in the COM DLL 2- With C++, the benefits like "interface" in OOP can only be taken advantage of at the source level. With COM, these benefits can be used at a binary level. 3- Some illustration about interface &pInterface ------- pInterface ---------- Interface----------------- methods Ixx ** Ixx * (method table) (void **) A Interface is a data structure in memory. It's nothing but a memory area containg a method table. Is my understanding alright? Thanks for your revision.

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  • deselectRowAtIndexPath on an ABPeoplePickerNavigationController

    - by Josh Wright
    I'm showing an ABPeoplePickerNavigationController as a tab in my app. The user clicks a name, then email address, then I do something with the email address. Afterwards, I'd like for the person and property that they selected to fade out (not be highlighted). In a normal table, I'd call deselectRowAtIndexPath. But with the ABPeoplePickerNavCont I don't seem to have access to it's table, nor do I know what indexPath is selected, nor is there an api for deselecting the row. On most apps, ABPeoplePickerNavCont is used modally so it doesn't matter that the row is still highlighted 'cause the whole thing gets dismissed. But in my app it does not get dismissed (just like the contacts tab in the Phone app). Any ideas?

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  • php / mysql pagination

    - by arrgggg
    Hi, I have a table with 58 records in mysql database. I was able to connect to my database and retrive all records and made 5 pages with links to view each pages using php script. webpage will look like this: name number john 1232343456 tony 9878768544 jack 3454562345 joe 1232343456 jane 2343454567 andy 2344560987 marcy 9873459876 sean 8374623534 mark 9898787675 nancy 8374650493 1 2 3 4 5 that's the first page of 58 records and those 5 numbers at bottom are links to each page that will display next 10 records. I got all that. but what I want to do is display the links in this way: 1-10 11-20 21-30 31-40 41-50 51-58 note: since i have 58 records, last link will display upto 58, instead of 60. Since I used the loop to create this link, depending on how many records i have, the link will change according to the number of records in my table. How can i do this? Thanks.

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  • How do I find hash value of a 3D vector ?

    - by brainydexter
    I am trying to perform broad-phase collision detection with a fixed-grid size approach. Thus, for each entity's position: (x,y,z) (each of type float), I need to find which cell does the entity lie in. I then intend to store all the cells in a hash-table and then iterate through to report (if any) collisions. So, here is what I am doing: Grid-cell's position: (int type) (Gx, Gy, Gz) = (x / M, y / M, z / M) where M is the size of the grid. Once, I have a cell, I'd like to add it to a hash-table with its key being a unique hash based on (Gx, Gy, Gz) and the value being the cell itself. Now, I cannot think of a good hash function and I need some help with that. Can someone please suggest me a good hash function? Thanks

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  • Html.RadioButtonListFor problem

    - by ognjenb
    <%using (Html.BeginForm("Numbers", "Numbers", FormMethod.Post)) { %> <table id="numbers"> <tr> <th> prvi_br </th> <th> drugi_br </th> <th> treci_br </th> </tr> <%int rb =1; %>" <% foreach (var item in Model) { %> <tr> <td> <%= Html.Encode(item.prvi_br) %> <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>" /> </td> <td> <%= Html.Encode(item.drugi_br) %> <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>"/> </td> <td> <%= Html.Encode(item.treci_br) %> <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>"/> </td> </tr> <% rb++; %> <% } %> </table> <p> <input type="submit" value="Save" /> </p> <%} %> How post this form with only one checked radio button? In my case all of 3 radio buttons is possible to check. How to restrict so that it is possible check only one radio. In this article I found good solutions but it can not be applied because I have a table.

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  • Proper way to format date from database using javascript/jquery

    - by Darcy
    Hi all, I am calling my database which contains a datetime datatype. The date looks like this: 2005-05-23 16:06:00.000 I would like to display this in a table when a user selects a certain item from a list. I call my controller action and return Json of all the times and put them in a table. The problem is the date is completely wrong. What is displayed is this: /Date(1255470180000)/ The date that is returned isn't even parsable (which I don't want to do anyway) so I can't even get the data if I wanted to. Any ideas?

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  • Retrieving Gtk::Widget's relative position: get_allocation() doesn't work

    - by a-v
    I need to retrieve the position of a Gtk::Widget relative to its parent, a Gtk::Table. Most sources (e.g. http://library.gnome.org/devel/gtk-faq/stable/x642.html) say that one needs to call Gtk::Widget::get_allocation(). However, the returned Gtk::Allocation object always contains x = -1, y = -1, width = 1, height = 1. I have to note that this happens before the Gtk::Table object is actually exposed and rendered. A call to show_all_children() or check_resize(), which I would expect to recalculate child widget geometry, doesn't help. What am I doing wrong? Thanks in advance.

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  • Entity Framework 4: Inheritance and Optimistic Concurrency

    - by Mohammadreza
    Hi guys, I'm using AdventureWorks 2008 R2 database and added the BusinessEntity and Person tables to my EDMX. Then I changed the model in which the Person table inherits from the BusinessEntity table. As you may know these two tables have ModifiedDate and rowguid columns so the Person class should not have these properties because it inherits them from the BusinessEntity class. My question is, how can I modify the model to support inheritance and optimistic concurrency on both Person and BusinessEntity classes/tables on ModifiedDate property/column. PS. It also get me an error message that I have asked here. Thanks

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  • LRU caches in C

    - by lazyconfabulator
    I need to cache a large (but variable) number of smallish (1 kilobyte to 10 megabytes) files in memory, for a C application (in a *nix environment). Since I don't want to eat all my memory, I'd like to set hard memory limit (say, 64 megabytes) and push files into a hash table with the file name as the key and dispose of the entries with the least use. What I believe I need is an LRU cache. Really, I'd rather not roll my own so if someone knows where I can find a workable library, please point the way? Failing that, can someone provide a simple example of an LRU cache in C? Related posts indicated that a hash table with a doubly-linked list, but I'm not even clear on how a doubly-linked list keeps LRU. Side note: I realize this is almost exactly the function of memcache, but it's not an option for me. I also took a look at the source hoping to enlighten myself on LRU caching, with no success.

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  • SQL Server Multiple Joins Are Taxing The CPU

    - by durilai
    I have a stored procedure on SQL Server 2005. It is pulling from a Table function, and has two joins. When the query is run using a load test it kills the CPU 100% across all 16 cores! I have determined that removing one of the joins makes the query run fine, but both taxes the CPU. Select SKey From dbo.tfnGetLatest(@ID) a left join [STAGING].dbo.RefSrvc b on a.LID = b.ESIID left join [STAGING].dbo.RefSrvc c on a.EID = c.ESIID Any help is appreciated, note the join is happening on the same table in a different database on the same server.

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  • General rule - when to use a model (Codeigniter)

    - by pingu
    Hi guys, I was just curious as to what the rule of thumb was for models. Generally, I use them only for situations where I need to add/edit or update database entries for an object. However, I'm building an app at the moment that has a "config" table which holds various data, such as last updated, which will control when certain features in the app should be displayed. In this instance, I will mostly need to retrieve data from the config table. Is it worth putting these config methods in model? I'm interested to hear how more experienced coders approach the MVC methodology in CI - example pseudo methods (e.g., what methods relating to the same object you'd use in the model and the controller) would be most helpful.

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  • Add UIView behind UITableView in UITableViewController code

    - by Drew C
    I would like to use a fixed image as the background in a simple grouped table view in my iPhone program. Unfortunately, no matter what I do, the background is always solid white. I have followed several supposed solutions on this site and others to no avail. Here is the relavant code in the viewDidLoad method of the table view controller class (note, this code uses a solid blue color rather than an image for simplicity's sake): self.tableView.opaque = NO; self.tableView.backgroundColor = [UIColor clearColor]; UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; backgroundView.backgroundColor = [UIColor blueColor]; [self.tableView.window addSubview:backgroundView]; [backgroundView release]; I suspect that I am not positioning the backgroundView view in the right place. I have tried sendToBack:, bringToFront:, and others but I always just get a white background. Is it possible to do this from within the UITableViewController? Must I use Interface Builder?

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  • How do I echo the number of items in an array?

    - by Joel
    A total newbie question I know. I'm sing Zend framework, and sending an array from the controller: $this->view->googleArray = $viewFeedArray; In the view, I have a foreach loop that is populating a table with the array contents. <?php foreach($this->googleArray as $row) { ?> <tr> <td><?php echo $row['when']; ?></td> ... ... </tr> <?php } ?> It all works fine. At the top of the table, I want to list the number of items in the array. Something like (which doesn't work): <?php echo $this->googleArray->totalResults; ?> event(s) found How would I do that? Thanks!

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  • How can I turn a bunch of rows into aggregated columns WITHOUT using pivot in SQL Server 2005?

    - by cdeszaq
    Here is the scenario: I have a table that records the user_id, the module_id, and the date/time the module was viewed. eg. Table: Log ------------------------------ User_ID Module_ID Date ------------------------------ 1 red 2001-01-01 1 green 2001-01-02 1 blue 2001-01-03 2 green 2001-01-04 2 blue 2001-01-05 1 red 2001-01-06 1 blue 2001-01-07 3 blue 2001-01-08 3 green 2001-01-09 3 red 2001-01-10 3 green 2001-01-11 4 white 2001-01-12 I need to get a result set that has the user_id as the 1st column, and then a column for each module. The row data is then the user_id and the count of the number of times that user viewed each module. eg. --------------------------------- User_ID red green blue white --------------------------------- 1 2 1 2 0 2 0 1 1 0 3 1 2 1 0 4 0 0 0 1 I was initially thinking that I could do this with PIVOT, but no dice; the database is a converted SQL Server 2000 DB that is running in SQL Server 2005. I'm not able to change the compatibility level, so pivot is out. How can I accomplish this?

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  • 8 byte Integer with Doctrine and PHP

    - by Rufinus
    Hi, the players: 64bit linux with php 5 (ZendFramework 1.10.2) PostgreSQL 7.3 Doctrine 1.2 Via a Flash/Flex client i get an 8byte integer value. the field in the database is an BIGINT (8 byte) PHP_INT_SIZE show that system supports 8byte integer. printing out the value in the code as it is and as intval() leads to this: Plain: 1269452776100 intval: 1269452776099 float rounding failure ? but what really driving me nuts is ERROR: invalid input syntax for integer: "1269452776099.000000"' when i try to use it in a query. like: Doctrine_Core::getTable('table')->findBy('external_id',$external_id); or Doctrine_Core::getTable('table')->findBy('external_id',intval($external_id)); How i am supposed to handle this ? or how can i give doctrine a floating point number which it should use on a bigint field ? Any help is much appreciated! TIA

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  • Order a MySQL result by Date and Time in PHP

    - by DomingoSL
    Hi, i have this code: $datos = mysql_query("SELECT * FROM `usuarios` LIMIT 0, 30 "); Who is a simple MySQL query in php, but i need the result organized by date and time. There is a field in my table who has this value (automatic inserted when the user sing up in my page). So the table is something like this: Id Name DT 1 Domingo 2010-04-26 23:00:00 2 Cesar 2010-04-25 12:00:00 3 Nataly 2010-04-26 08:00:00 DT is a "datetime" field. How can i get the result order by new to old? Thanks!

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  • What does MSSQL execution plan show?

    - by tim
    There is the following code: declare @XmlData xml = '<Locations> <Location rid="1"/> </Locations>' declare @LocationList table (RID char(32)); insert into @LocationList(RID) select Location.RID.value('@rid','CHAR(32)') from @XmlData.nodes('/Locations/Location') Location(RID) insert into @LocationList(RID) select A2RID from tblCdbA2 Table tblCdbA2 has 172810 rows. I have executed the batch in SSMS with “Include Actual execution plan “ and having Profiler running. The plan shows that the first query cost is 88% relative to the batch and the second is 12%, but the profiler says that durations of the first and second query are 17ms and 210 ms respectively, the overall time is 229, which is not 12 and 88.. What is going on? Is there a way how I can determine in the execution plan which is the slowest part of the query?

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  • UITableViewController's TableView becomes NULL

    - by Travis
    I have UITableViewController (initiated by the Navigation-based app project template). I am overriding loadView and putting up an alternative view (w/ a UILabel and UIActivityIndicator) to display while the table's contents is loading. When the loading is done, I remove the loading view and try to display the table view but I see that it's NULL. So in the simulator I see my loading view and then when the loading's done the view disappears but my tableview never comes. I'm confused what the difference is between self.view and self.tableView in my UITableViewController and how I can exchagn

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  • DataGridRow Cells property

    - by Michal Krawiec
    I would like to get to DataGridRow Cells property. It's a table of cells in a current DataGrid. But I cannot get access direct from code nor by Reflection: var x = dataGridRow.GetType().GetProperty("Cells") //returns null Is there any way to get this table? And related question - in Watch window (VS2008) regular properties have an icon of a hand pointing on a sheet of paper. But DataGridRow.Cells has an icon of a hand pointing on a sheet of paper with a little yellow envelope in a left bottom corner - what does it mean? Thanks for replies.

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  • Help needed with MySQL query to join data spanning multiple tables with data used as column names

    - by gurun8
    I need a little help putting together a SQL query that will give me the following resultsets: and The data model looks like this: The tricky part for me is that the columns to the right of the "Product" in the resultset aren't really columns in the database but rather key/value pairs spanned across the data model. Table data is as follows: My apologies in advance for the image heavy question and the image quality. This just seemed like the easiest way to convey the information. It'll probably take someone less time to write the query statement to achieve the results than it did for me to assemble this question. By the way, the "product_option" table image is truncated but it illustrated the general idea of the data structure. The MySQL server version is 5.1.45.

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  • SQL count NULL cells

    - by Giuseppe
    Dear All, I have the following problem. I have a table in a db, with many columns. I can do different kind of select queries, to show, for example, for each record that satisfies a condition: all cells from columns with names ending in _t0 all cells from columns with names ending in _t1 ... To get the column lists to form the queries I use the information schema. Now, the problem: each query returns a record with a subset of the columns of the big table. This means that I can get a row of (all!) NULLs. How can I ask my query to reject such rows without having to type in explicitely the column names (i.e. by saying where col_1 is not null, col_2 is not null...)? Is it possible? Thanks in advance!!! Sep

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