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• Disabling Navigation Flicks in WPF

  - by Brian Genisio's House Of Bilz

  I am currently working on a multi-touch application using WPF.  One thing that has been irritating me with this development is an automatic navigation forward/back command that is bound to forward and backwards flicks.  Many of my touch-based interactions were being thwarted by gestures picked up by WPF as navigation.  I just wanted to disable this behavior. My programmatic back/forward calls are not affected by this change, which is nice.  Here is how I did it:  In my main window, I added the following command bindings:<NavigationWindow.CommandBindings> <CommandBinding Command="NavigationCommands.BrowseBack" Executed="DoNothing" /> <CommandBinding Command="NavigationCommands.BrowseForward" Executed="DoNothing" /> </NavigationWindow.CommandBindings> Then, the DoNothing method in the code-behind does nothing:private void DoNothing(object sender, ExecutedRoutedEventArgs e) { } There may be a better way to do this, but I haven’t found one.

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• Append a string to the end of an element attribute using jQuery

  - by ILMV

  I have an element: <select id="row" /> I want to append a string to the end of the id attribute, like this: <select id="row_1" /> The jQuery I am using to achieve this is (from within an each): $(this).attr('id',$(this).attr('id')+'_'+row_count); This looks ugly as sin, and whilst it works I want to know if there is a simpler solution. In this example, the ID prefix (e.g. row) is never constant, so I can't just do 'row_'+row_count. Cheers!

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• PHP variable passed to JasperServer for reports

  - by Ronedog

  Is it possible to pass a variable from php to a report in JasperServer? For example, in my php application I keep the department_id stored in a session variable. I would like to pass the department_id over to my reports running on JasperServer and display the information appropriate for that department. in the iReport I have a query like: "SELECT * FROM employees WHERE department_id = $P{dept_id_from_php}", but I have to build a dropdown select list to pass the dept_id parameter. The end result is I would like the user logged into my PHP application to view the employee information that is related to the department the logged-in-user belongs to. I don't want to pass this over using the querystring because the user could just change the id in the querystring and have access to other departments information. Ideally I would like to only pass that parameter once, then reuse it in all the reports, like a global variable. Is this possible?

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• Explaining training method for AdaBoost algorithm

  - by konzti8

  Hi, I'm trying to understand the Haar feature method used for the training step in the AdaBoost algorithm. I don't understand the math that well so I'd appreciate more of a conceptual answer (as much as possible, anyway). Basically, what does it do? How do you choose positive and negative sets for what you want to select? Can it be generalized? What I mean by that is, can you choose it to find any kind of feature that you want no matter what the background is? So, for example, if I want to find some kind of circular blob - can I do that? I've also read that it is used on small patches for the images around the possible feature - does that mean you have to manually select that image patch or can it be automated to process the entire image? Is there matlab code for the training step? Thanks for any help...

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• mysql query performance help

  - by Stefano

  Hi I have a quite large table storing words contained in email messages mysql> explain t_message_words; +----------------+---------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------+---------+------+-----+---------+----------------+ | mwr_key | int(11) | NO | PRI | NULL | auto_increment | | mwr_message_id | int(11) | NO | MUL | NULL | | | mwr_word_id | int(11) | NO | MUL | NULL | | | mwr_count | int(11) | NO | | 0 | | +----------------+---------+------+-----+---------+----------------+ table contains about 100M rows mwr_message_id is a FK to messages table mwr_word_id is a FK to words table mwr_count is the number of occurrencies of word mwr_word_id in message mwr_message_id To calculate most used words, I use the following query SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id ORDER BY word_count DESC LIMIT 100; that runs almost forever (more than half an hour on the test server) mysql> show processlist; +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- | Id | User | Host | db | Command | Time | State | Info +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- processlist | 41 | root | localhost:3148 | tst_db | Query | 1955 | Copying to tmp table | SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id | +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- 3 rows in set (0.00 sec) Is there anything I can do to "speed up" the query (apart from adding more ram, more cpu, faster disks)? thank you in advance stefano

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• WPF Binding Collection To ComboBox and Selecting an item

  - by Adam Driscoll

  I've been knocking my head against this for some time now. I'm not really sure why it isn't working. I'm still pretty new to this whole WPF business. Here's my XAML for the combobox <ComboBox Width="200" SelectedValuePath="Type.FullName" SelectedItem="{Binding Path=Type}" Name="cmoBox" > </ComboBox> Here's what populates the ComboBox (myAssembly is a class I created with a list of possible types) cmoBox.ItemsSource = myAssembly.PossibleTypes; I set the DataContext in a parent element of the ComboBox in the code behind like this: groupBox.DataContext = listBox.SelectedItem; I want the binding to select the correct "possible type" from the combo box. It doesn't select anything. I have tried SelectedValue and SelectedItem. When I changed the DisplayMemberPath of the ComboBox to a different property it changed what was displayed so I know it's not completely broken. Any ideas???

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• Checking if MySQL Database data does not exist

  - by Ben Sinclair

  I have my songs set-up in my MySQL database. Each song is is either assigned multiple locations or has no locations at all. Only the songs that either have no locations assigned in the database or have the location assigned to the ones specified below should be pulled from the database. Hopefully when you understand my query below it will make sense SELECT s.* FROM roster_songs AS s LEFT JOIN roster_songs_locations AS sl ON sl.song_id = s.id WHERE EXISTS ( SELECT sl2.* FROM roster_songs_locations AS sl2 WHERE s.id != sl2.song_id ) OR ( sl.location_id = '88fb5f94-aaa6-102c-a4fa-1f05bca0eec6' OR sl.location_id = '930555b0-a251-102c-a245-1559817ce81a' ) GROUP BY s.id The query almost works except it pulls out of the database songs that are assigned to sl.location_id's that aren't specified in the above query. I think it has something to do with my EXISTS code picking them up... Any ideas how I can get this to work?

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• How can I return default at loop end in Scheme?

  - by Kufi Annan

  I'm trying to implement back-tracking search in Scheme. So far, I have the following: (define (backtrack n graph assignment) (cond (assignment-complete n assignment) (assignment) ) (define u (select-u graph assignment)) (define c 1) (define result 0) (let forLoop () (when (valid-choice graph assignment c) (hash-set! assignment u c) (set! result (backtrack n graph assignment)) (cond ((not (eq? result #f)) result)) (hash-remove! assignment u) ) (set! c (+ c 1)) (when (>= n c) (forLoop)) ) #f ) My functions assignment-complete and select-u pass unit tests. The argument assignment is a hash-table make with (make-hash), so it should be fine. I believe the problem I have is related to returning false at the end of the loop, if no recursive returns a non-false value (which should be a valid assignment).

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• entity framework inserting a many-to-many relationship between two existing objects while updating

  - by redbluegreen

  I'm trying to do this: using(var context = new SampleEntities()) { User user = select a user from database; //Update user's properties user.Username = ... user.Website = ... //Add a role Role role = select a role from database //trying to insert into table UserRoles which has columns (UserID, RoleID) user.Roles.Add(role); //Apply property changes context.ApplyPropertyChanges("Users", user); context.SaveChanges(); } However, I get an exception telling me that "The existing object in the ObjectContext is in the Added state" and can't "ApplyPropertyChanges". If "ApplyPropertyChanges()" is removed, it adds a User. What orders should these methods be called? I don't need to do them separately right? Thanks.

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• SSMS Results to Grid - CRLF not preserved in copy/paste - any better techniques?

  - by Cade Roux

  When I have a result set in the grid like: SELECT 'line 1 line 2 line 3' or SELECT 'line 1' + CHAR(13) + CHAR(10) + 'line 2' + CHAR(13) + CHAR(10) + 'line 3' With embedded CRLF, the display in the grid appears to replace them with spaces (I guess so that they will display all the data). The problem is that if I am code-generating a script, I cannot simply cut and paste this. I have to convert the code to open a cursor and print the relevant columns so that I can copy and paste them from the text results. Is there any simpler workaround to preserve the CRLF in a copy/paste operation from the results grid? The reason that the grid is helpful is that I am currently generating a number of scripts for the same object in different columns - a bcp out in one column, an xml format file in another, a table create script in another, etc...

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• jquery html attribute not working in IE

  - by Gopal

  I am using country and state dropdowns in my form. Whenever the user selects the country in the dropdown, the respective states of the country will populate in the states dropdown. I am populating the states in the dropdown using ajax call. The problem is that the states get populated in Mozilla but it doesnt work in IE. I guess there is some problem in jquery while loading the states in the states dropdown. The jquery code i am using is $('select#edit-country').change(function(e) { $.getJSON("loadContactUsStates",{id: $(this).val(), ajax: 'true'}, function(j){ var options = ''; for (var i = 0; i < j.length; i++) { options += '<option value="' + j[i].optionValue + '">' + j[i].optionDisplay + '</option>'; } <!-----I guess the problem is with the below line------------------> $("select#edit-state").html(options); })//end json });

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• many-to-many query

  - by kofto4ka

  Hello, guys! I have a problem and I dont know what is better solution. Okay, I have 2 tables: posts(id, title), posts_tags(post_id, tag_id). I have next task: must select posts with tags ids for example 4, 10 and 11. Not exactly, post could have any other tags at the same time. So, how I could do it more optimized? Creating temporary table in each query? Or may be some kind of stored procedure? In the future, user could ask script to select posts with any count of tags (it could be 1 tag only or 10 at the same time) and I must be sure that method that I will choose would be the best method for my problem. Sorry for my english, thx for attention.

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• Need a mysql query to extract data from mm-forms

  - by Kirill

  http://cl.ly/201a11b430bf60ef9e97 is what the rows look like, after I clean them up a bit: SELECT fk_form_joiner_id,form_key,value FROM wp_contactform_submit_data WHERE form_key!='page_post_id' AND form_key!='captcha-802' AND form_key!='page_post_title' AND form_key!='user_ID' What I need is a query where it would transform this into a structure like: id | First-name | Surname-name | your-email | dob | address-1 | address-2 | county | postcode | phone ------------------------------------------------------------------------------------------------------- 88 | jack | Somethin | [email protected] | dob | (etc) I think I know a way to do this through php, but I think there must be a way to do it as a mysql query. Ultimately, I need to export this (into a csv), but if you could give me a query that would output this into a mysql table (or at least a workable select query, that I could then turn into an insert query loop, to create a table), I'd do it form there. Thank you.

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• rts libgdx design?

  - by user36531

  I am attempting to create a simple rts multi-player strategy game using libgdx. I am stumped at the moment. I want the underlying game world to run at all times and be aware of where all items are on the map.. so if player A logs in and moves unit to some location on the grid and logs off, that unit info is still there and can be accessed again by player A when they log back on to move somewhere else (if it didnt get attacked during the playerA was logged off). How can i do this? Do i create a main game world on the server and when players connect make client just sequentially request whats in each visible tile? Is there an easier way to get this done? Or go SQL route? Whats better?

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• How can I equalize the heights of text input fields?

  - by David

  What is the best way to equalize the height of my <select..> elements and my <input type="text"..> elements? It's proving difficult because of differences in box-sizing models. Google Chrome's user agent stylesheet has this: select { -webkit-box-sizing: border-box; } ..whereas other text input fields use the content box model. Why the difference? Should I perhaps make all of my text-based input fields use the border-box model? BTW, I'm using standards-compliant mode (by using <!DOCTYPE html>).

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• LINQ query and lambda expressions

  - by user329269

  I'm trying to write a LINQ query and am having problems. I'm not sure if lambda expressions are the answer or not but I think they may be. I have two combo boxes on my form: "State" and "Color". I want to select Widgets from my database based on the values of these two dropdowns. My widgets can be in one of the following states: Not Started, In Production, In Finishing, In Inventory, Sold. Widgets can have any color in the 'color' table in the database. The 'state' combobox has selections "Not Sold," "In Production/Finishing", "Not Started," "In Production," "In Finishing," "In Inventory," "Sold." (I hope these are self-explanatory.) The 'color' dropdown has "All Colors," and a separate item for each color in the database. How can I create a LINQ query to select the widgets I want from the database based on the dropdowns?

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• switch between two cursors based on parameter passed into stored procedure

  - by db83

  Hi, I have two cursors in my procedure that only differ on the table name that they join to. The cursor that is used is determined by a parameter passed into the procedure if (param = 'A') then DECLARE CURSOR myCursor IS SELECT x,y,z FROM table1 a, table2 b BEGIN FOR aRecord in myCursor LOOP proc2(aRecord.x, aRecord.y, aRecord.z); END LOOP; COMMIT; END; elsif (param = 'B') then DECLARE CURSOR myCursor IS SELECT x,y,z FROM table1 a, table3 b -- different table BEGIN FOR aRecord in myCursor LOOP proc2(aRecord.x, aRecord.y, aRecord.z); END LOOP; COMMIT; END; end if I don't want to repeat the code for the sake of one different table. Any suggestions on how to improve this? Thanks in advance

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• Robust unit-testing of HTML in PHP

  - by asbja

  I'm adding unit-tests to an older PHP codebase at work. I will be testing and then rewriting a lot of HTML generation code and currently I'm just testing if the generated strings are identical to the expected string, like so: (using PHPUnit) public function testConntype_select() { $this->assertEquals( '<select><option value="blabla">Some text</option></select>', conntype_select(1); // A value from the test dataset. ); } This way has the downside that attribute ordering, whitespace and a lot of other irrelevant details are tested as well. I'm wondering if there are any better ways to do this. For example if there are any good and easy ways to compare the generated DOM trees. I found very similar questions for ruby, but couldn't find anything for PHP.

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• possible to create sql query with table wildcards?

  - by Rees

  this is probably a simple question, but i have been unable to find a solution online, any help would be much appreciated. I'm trying to create an SQL query in PHP and would like to somehow apply a wild card to the TABLE filter... something perhaps like.... select * from %table%. However, I have only so far been able to see filters for column values not table names. as an example i would have tables such as: jan_table_1 feb_table_1 jan_table_2 feb_table_2 and would want to say, select only tables with a "jan" prefix... or "1" suffix. Is there a quick and easy solution to this that I have not seen? Thanks in advance!

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• DBLinq not generating where clause

  - by sipwiz

  I'm testing out DBLinq-0.18 and DBLinq from SVN Trunk with MySQL and Postgresql. I'm only using a very simple query but on both database DBLinq is not generating a Where clause. I have confirmed this by turning on statement logging on Postgresql to check exactly what request DBLinq is sending. My Linq query is: MyDB db = new MyDB(new NpgsqlConnection("Database=database;Host=localhost;User Id=postgres;Password=password")); var customers = from customer in db.Customers where customer.CustomerUserName == "test" select customer; The query works ok but the SQL generated by DBLinq is of the form: select customerusername, customerpassword .... from public.customers There is no Where clause which means DBLinq must be pulling the whole table down before running the Linq query. Has anyone had any experience with DBLinq and know what I could be doing wrong?

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• Is it possible to create a new T-SQL Operator using CLR Code in MSSQL?

  - by Eoin Campbell

  I have a very simple CLR Function for doing Regex Matching public static SqlBoolean RegExMatch(SqlString input, SqlString pattern) { if (input.IsNull || pattern.IsNull) return SqlBoolean.False; return Regex.IsMatch(input.Value, pattern.Value, RegexOptions.IgnoreCase); } It allows me to write a SQL Statement Like. SELECT * FROM dbo.table1 WHERE dbo.RegexMatch(column1, '[0-9][A-Z]') = 1 -- match entries in col1 like 1A, 2B etc... I'm just thinking it would be nice to reformulate that query so it could be called like SELECT * FROM dbo.table1 WHERE column1 REGEXLIKE '[0-9][A-Z]' Is it possible to create new comparison operators using CLR Code. (I'm guessing from my brief glance around the web that the answer is NO, but no harm asking) Thanks, Eoin C

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• iPhone UITableViewController and Checklist

  - by Leo

  Hi guys, I have an iPhone application. First view controller which is a UITableViewController has a cell for "category". When user select "category" it will push another UITableViewController where user can select category. What is the proper way to implement that so when you click back on navigation bar it will remember your selection and populate the selected in the back view controller's "category" cell. An example of this can be found in ebay application. When you search for something in ebay iphone application you have "Refine" button on top right. When you click this you can further refine the category. I'm trying to achieve exactly like this. Thanks

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• Precompile Lambda Expression Tree conversions as constants?

  - by Nathan

  It is fairly common to take an Expression tree, and convert it to some other form, such as a string representation (for example this question and this question, and I suspect Linq2Sql does something similar). In many cases, perhaps even most cases, the Expression tree conversion will always be the same, i.e. if I have a function public string GenerateSomeSql(Expression<Func<TResult, TProperty>> expression) then any call with the same argument will always return the same result for example: GenerateSomeSql(x => x.Age) //suppose this will always return "select Age from Person" GenerateSomeSql(x => x.Ssn) //suppose this will always return "select Ssn from Person" So, in essence, the function call with a particular argument is really just a constant, except time is wasted at runtime re-computing it continuously. Assuming, for the sake of argument, that the conversion was sufficiently complex to cause a noticeable performance hit, is there any way to pre-compile the function call into an actual constant?

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• SQL for selecting only the last item from a versioned table

  - by Jeremy

  I have a table with the following structure: CREATE TABLE items ( id serial not null, title character varying(255), version_id integer DEFAULT 1, parent_id integer, CONSTRAINT items_pkey PRIMARY KEY (id) ) So the table contains rows that looks as so: id: 1, title: "Version 1", version_id: 1, parent_id: 1 id: 2, title: "Version 2", version_id: 2, parent_id: 1 id: 3, title: "Completely different record", version_id: 1, parent_id: 3 This is the SQL code I've got for selecting out all of the records with the most recent version ids: select * from items inner join ( select parent_id, max(version_id) as version_id from items group by parent_id) as vi on items.version_id = vi.version_id and items.parent_id = vi.parent_id Is there a way to write that SQL statement so that it doesn't use a subselect?

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• An introduction to Oracle Retail Data Model with Claudio Cavacini

  - by user801960

  In this video, Claudio Cavacini of Oracle Retail explains Oracle Retail Data Model, a solution that combines pre-built data mining, online analytical processing (OLAP) and dimensional models to deliver industry-specific metrics and insights that improve a retailers’ bottom line. Claudio shares how the Oracle Retail Data Model (ORDM) delivers retailer and market insight quickly and efficiently, allowing retailers to provide a truly multi-channel approach and subsequently an effective customer experience. The rapid implementation of ORDM results in predictable costs and timescales, giving retailers a higher return on investment. Please visit our website for further information on Oracle Retail Data Model.

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