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  • SQL INSERT performance omitting field names?

    - by Marco Demaio
    Does anyone knows if removing the field names from an INSERT query results in some performance improvements? I mean is this: INSERT INTO table1 VALUES (value1, value2, ...) faster for DB to be accomplished rather than doing this: INSERT INTO table1 (field1, field2, ...) VALUES (value1, value2, ...) ? I know it might be probably a meaningless performance difference, but just to know.

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  • how plot a matrix on a wxframe?

    - by milton
    I am starting on wx, and I need to plot a matrix (like a grid) that is stored on a list of lists on wx Frame. My matrix have to values, and I would like to set different colors for each values. mymatrix=[[100,200,200,200,100,200,200,200,100,100], [200,200,100,100,100,100,200,200,100,200], [100,100,200,200,100,100,100,100,100,100], [100,200,200,100,200,100,100,200,200,200], [200,100,200,100,100,100,100,200,100,100], [100,200,200,100,200,200,100,200,100,100], [200,100,200,100,100,100,200,100,100,100], [200,200,100,200,100,200,200,200,200,200], [200,200,200,100,200,200,200,100,100,100], [100,100,100,200,200,200,100,200,200,100]] a = numpy.array(landscape_matrix) im = Image.fromarray(a) I can show it using im.show() but I need to plot it on a wx frame. All help is welcome. [email protected]

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  • Help with XML SerializableDictionary in C#

    - by psilos
    Hi I am using the class public class SerializableDictionary : Dictionary, IXmlSerializable in order to serialize a dictionary. However it doesnt work when as values I have collelctions (eg List) or tyes other than the primitive types (eg. int, double, string....). My question is which types the TKey, TValue imply or can hold, and if there is way to have a serializable dictionary which collections as values.

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  • jquery; django; parsing httpresponse

    - by Grinart
    hi_all() I have a problem with parsing http response.. I try send some values to client >>>>return HttpResponse(first=True,second=True) when parsing: $.post('get_values',"",function(data){ alert(data['first']); //The alert isn't shown!!! }); what is the right way to extract values from httpresponse maybe I make a mistake when create my response..

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  • Add/Edit Columns in DataBound DataGridView

    - by Dave
    I've got a datagridview that is databound from a database table. How do I: a) Edit the displayed value for a column using the values from other columns in the row? (For example, display a URL like: <a href="/url?param=columnA">columnB</a> where columnA is the value from column A and columnB is the value from columnB) b) Add an additional column using values from the other columns (similar to a.)

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  • Are there any platforms where using structure copy on an fd_set (for select() or pselect()) causes p

    - by Jonathan Leffler
    The select() and pselect() system calls modify their arguments (the 'struct fd_set *' arguments), so the input value tells the system which file descriptors to check and the return values tell the programmer which file descriptors are currently usable. If you are going to call them repeatedly for the same set of file descriptors, you need to ensure that you have a fresh copy of the descriptors for each call. The obvious way to do that is to use a structure copy: struct fd_set ref_set_rd; struct fd_set ref_set_wr; struct fd_set ref_set_er; ... ...code to set the reference fd_set_xx values... ... while (!done) { struct fd_set act_set_rd = ref_set_rd; struct fd_set act_set_wr = ref_set_wr; struct fd_set act_set_er = ref_set_er; int bits_set = select(max_fd, &act_set_rd, &act_set_wr, &act_set_er, &timeout); if (bits_set > 0) { ...process the output values of act_set_xx... } } My question: Are there any platforms where it is not safe to do a structure copy of the struct fd_set values as shown? I'm concerned lest there be hidden memory allocation or anything unexpected like that. (There are macros/functions FD_SET(), FD_CLR(), FD_ZERO() and FD_ISSET() to mask the internals from the application.) I can see that MacOS X (Darwin) is safe; other BSD-based systems are likely to be safe, therefore. You can help by documenting other systems that you know are safe in your answers. (I do have minor concerns about how well the struct fd_set would work with more than 8192 open file descriptors - the default maximum number of open files is only 256, but the maximum number is 'unlimited'. Also, since the structures are 1 KB, the copying code is not dreadfully efficient, but then running through a list of file descriptors to recreate the input mask on each cycle is not necessarily efficient either. Maybe you can't do select() when you have that many file descriptors open, though that is when you are most likely to need the functionality.) There's a related SO question - asking about 'poll() vs select()' which addresses a different set of issues from this question.

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  • Binding of JText fields value to Info Class

    - by Faizan Ahmed
    Is there any way to automatic binding of Swing JTextFields to Info Class. e.g private JTextField receiptId; private JTextField Id; public class Info { private string receiptId; private String id; // Getters and Setters } Is there any way when I entered values from Swing page then automatically values bind with my Info class? After that I can pass my Info object to other classes instead of sending all Text Fields.

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  • how to implement chating applicaiton in android

    - by Aswan
    i am developing one chat form in my apps displying the chats i was taken linear laout but i need to refresh that chat msg every 5 seconds for that i am using timer.while dynamically adding it is showing getting values from db and add to layout but in gui i am not able to get those messages for that what i have to do. is there any way for chat application refreshing page .how to update the values to layout in android .pl it's very urgent to me Thanks in advance Aswan

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  • Difference between following arrays?

    - by jayesh jain
    This is ARRAY1 var array_1 = ["51b59c162de88", [ ["parties", 0.0, 0.011] ]] ["51b59c1b4f52f", [ ["star-speak", 0.0, 0.006], ["parties", 0.0, 0.011] ]] This is ARRAY2 var array_2 = [{ key: "51b59c162de88", values: ["parties", 0.0, 0.011]] }, { key: "51b59c162de94", values: [ ["star-speak", 0.0, 0.006], ["parties", 0.0, 0.011] ] }, ]; What is the exact difference between array 1 and array 2. How do I access their data? I am new to json!!!!

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  • Best way to Sort-n-Concatenate 5 columns

    - by SDReyes
    Having five columns containing numeric values A | B | C | D | E ------------------- 2 | 3 | 4 | 1 | 5 3 | 6 | 1 | 5 | 4 4 | 5 | 7 | 1 | 3 I want to obtain the concatenation of the values after sort them: ABCDE ----------- 1 2 3 4 5 1 3 4 5 6 1 3 4 5 7 What is the best way to do it?

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  • Update a column based on a field from another table

    - by Sergio
    Hi: I'd like to update values in one table based on corresponding values from other tables. Say you want to update prices of pieces provided by one specific manufacturer whose name is in the table Manufacturers with the Pieces table containing only the id of the manufacturer. I've seen several solutions for MySQL here and for MS SQL Server here but none of them seems to work in SQLite. Any suggestion?

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  • SSIS Null Value Questions

    - by Saobi
    I have a table with 5 string columns, all can be NULLs. After I read the data from this table, I want to convert any null values into empty strings. The reason is that I need to compare these columns with columns in another table of the same schema (using conditional split), and null values would cause the comparison to evaluate to NULL. Is there any functionality in SSIS that allows me to convert NULL's to empty strings, or just not having to deal with NULL's at all?

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  • Producing dynamically generated range names in Excel using c#

    - by Matey
    What is the best way to produce several tables of unknown size on the same worksheet? Values will be pulled from an oracle database and are used as values on several tables. Is it possible to create dynamic named ranges or is some other method desirable? I have some experience with c# but do not have access to VSTO 2005. Any help or suggestions would be greatly appreciated. I am willing to explain the problem further if requested.

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  • How can I use Generics to create a way of making an IEnumerable from an enum?

    - by Samantha J
    Given an enum like this: public enum City { London = 1, Liverpool = 20, Leeds = 25 } public enum House { OneFloor = 1, TwoFloors = 2 } I am using the following code to give me an IEnumerable: City[] values = (City[])Enum.GetValues(typeof(City)); var valuesWithNames = from value in values select new { value = (int)value, name = value.ToString() }; The code works very good however I have to do this for quite a lot of enums. Is there a way I could create a generic way of doing this?

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  • asp.net formatting an email

    - by user279521
    I am working on an application that involves the user clicking on a hyperlink to popup an outlook email template. I have the SendTo values, and the subject values. How do I enter text into the body of the email?

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  • Store default value in iphone

    - by Sreelal
    Hi, I am developing my first iPhone application.I need store some values in a place where the values will not get lost if the app is deleted .I need this to get the number of days the user actually used the app.Is this possible to do ? Thanks in advance

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  • Column header direction is SSRS Matrix

    - by jestges
    Hi is it possible to change the direction of column header values ? By default header valules displayed in horizontal direction only. But I want to show the values in vertical direction. Is it possible? I tried from the last 3 days. But no where I got any good results. Thanks in advance

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  • Action Script 3 / Flex builder 3 : How to make a diagram.

    - by JePz
    Hi, I want to make a diagram with either flash CS4 or flex builder 3, don't know with one would be the best for the job. More about the task: I want to send in values external to the swf file. The swf-file takes the vaules and makes a diagram of it using x and y values. Any advise or tips of where i can make this is much appreciated! Thanks in advance! jesper

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  • How to retrieve the XML file which is under the project folder

    - by Vara Prasad.M
    I having an XML file and that file is under the Documents folder. If I actually give the entire path in C# then I am able to retrieve the XML values, but if I give the project path then it is not getting the values. For example: string fileNamePath=ConfigurationManager.AppSettings["XMLDocPath"].ToString() + fileName; m_xmld.Load(fileNamePath); It is throwing a runtime error.

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