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  • What's beyond c,c++ and data structure?

    - by sagacious
    I have learnt c and c++ programming languages.i have learnt data structure too. Now i'm confused what to do next?my aim is to be a good programmer. i want to go deeper into the field of programming and making the practical applications of what i have learnt. So,the question takes the form-what to do next?Or is there any site where i can see advantage of every language with it's features? sorry,if there's any language error and thanks in advance.

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  • Making user input/math on data fast, unlike excel type programs

    - by proGrammar
    I'm creating a research platform solely for myself to do some research on data. Programs like excel are terribly slow for me so I'm trying to come up with another solution. Originally I used excel. A1 was the cell that contained the data and all other cells in use calculated something on A1, or on other cells, that all could be in the end traced to A1. A1 was like an element of an array, I then I incremented it to go through all my data. This was way too slow. So the only other option I found originally was to hand code in c# the calculations inside a loop. Then I simply recompiled each time I changed my math. This was terribly slow to do and I had to order everything correctly so things would update correctly (dependencies). I could have also used events, but hand coding events for each cell like calculation would also be very slow. Next I created an application to read Excel and to perfectly imitate it. Which is what I now use. Basically I write formulas onto a fraction of my data to get live results inside excel. Then my program reads excel, writes another c# program, compiles it, and runs that program which runs my excel created formulas through a lot more data a whole lot faster. The advantage being my application dependency sorts everything (or I could use events) so I don't have to (like excel does) And of course the speed. But now its not a single application anymore. Instead its 2 applications, one which only reads my formulas and writes another program. The other one being the result which only lives for a short while before I do other runs through my data with different formulas / settings. So I can't see multiple results at one time without introducing even more programs like a database or at least having the 2 applications talking to each other. My idea was to have a dll that would be written, compiled, loaded, and unloaded again and again. So a self-updating program, sort of. But apparently that's not possible without another appdomain which means data has to be marshaled to be moved between the appdomains. Which would slow things down, not for summaries, but for other stuff I need to do with all my data. I'm also forgetting to mention a huge problem with restarting an application again and again which is having to reload ALL my data into memory again and again. But its still a whole lot faster than excel. I'm really super puzzled as to what people do when they want to research data fast. I'm completely unable to have a program accept user input and having it fast. My understanding is that it would have to do things like excel which is to evaluate strings again and again. So my only option is to repeatedly compile applications. Do I have a correct understanding on computer science? I've only just began programming, and didn't think I would have to learn much to do some simple math on data. My understanding is its either compiling my user defined stuff to a program or evaluating them from a string or something stupid again and again. And my only option is to probably switch operating systems or something to be able to have a program compile and run itself without stopping (writing/compiling dll, loading dll to program, unloading, and repeating). Can someone give me some idea on how computers work? Is anything better possible? Like a running program, that can accept user input and compile it and then unload it later? I mean heck operating systems dont need to be RESTARTED with every change to user input. What is this the cave man days? Sorry, it's just so super frustrating not knowing what one can do, and can't do. If only I could understand and learn this stuff fast enough.

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  • Five stars of open data - example and review

    - by Joe
    (there may be a more suited SE site for this question so feel free to shift) I have some data I'd like to make open to the public - It's synatesis of some related data retrived from freedom of infomation requests over the last year. The data itself is at http://www.cs.rhul.ac.uk/home/joseph/domesday/Domesday-Scotland.csv or for fans of Excel, at http://www.cs.rhul.ac.uk/home/joseph/domesday/Domesday-Scotland.xlsx . It's no more than a table with about five columns. I'd like to make this properly open data, so I was looking at the 5 star deployment scheme for Open Data. Much of which is fine but I'm confused towards the end and I could do with an explenation from people who know the answers. So to get achieve the star levels I need: "make your stuff available on the Web (whatever format) under an open license" trival - all I have to do is put the notes up on the page that will give the provance of the data. "make it available as structured data (e.g., Excel instead of image scan of a table)"… done… "use non-proprietary formats (e.g., CSV instead of Excel)" - done… "use URIs to identify things, so that people can point at your stuff" - this is where I start to get a bit hazy - does this mean there should be an URI for every line in the table? "link your data to other data to provide context" - this isn't massively clear to me - does this mean to give the provence of the data? One column of the data I've put out is a link to where the data came from - is that the sort of thing we're looking at? Any and all information and answers welcome… EDIT - or if anyone wants to recommend a place SE or other place to ask the question - that would be cool...

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  • Export to excel in TFS 2012

    - by Martin
    I've installed Visual studion 2012 RC. I'm working withTFS2012 and When I want to export an user story to excel I see the following error: "TF400422: Failed to open in Microsoft Excel: Error loading type library/Dll. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY))" I'm using Microsoft Office Professional Plus 2010. Version: 14.0.6112.5000 (64-bit) This page Shows the meaning of many error number but this error (code: TF400422) isn't there. Perhaps this relates to this other issue. Thanks!!

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  • C# export to excel from sql server

    - by Manish Gupta
    In my C# windows application, I am exporting sql server data to excel on remote drive. But it is too slow. However, if I export data to excel in the local drive, it is fast. How can I increase the time if I want to export data to remote drive? Thanks in advance...

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  • export to excel from vb.net from sql datareader

    - by reffer
    I have an sql query with sql datareader. i put a for loop for the data reader. now when the data starts coming in from the query i want it to export to excel in the for loop. here's my code Try Dim SqlStr As String = "", dr As SqlDataReader = Nothing ConnectDB(Cnn) Str = "query" SqlCmd = New SqlCommand(Str, Cnn) dr = SqlCmd.ExecuteReader while dr.read ..EXPORT TO EXCEL do end while does anyone know how to do this?

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  • Automatic hyperlink in Excel [closed]

    - by developer
    Hi All, Is it possible to hyperlink a url in excel automatically. I mean when the cell starts with something like http or www can I hyperlink that. Currently, I have to hit enter in the cell value in the formula bar to make the link as clickable. Also if I change the value in the cell, the link doesnt get refreshed until I hit enter. Is there a way in excel where it will automatically detect and apply a hyperlink.

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  • how to convert excel values into buckets

    - by oo
    i have a set of data in excel and in one column is a estimate (number of weeks) i want an excel formula to bucket it into Small Medium Large where if the value is 0 - 10 then put it Small. If the value is 10 - 20 put it in Medium, etc . . . if there any elegant way of doing it besides having nested if statements all put together?

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  • MS Excel XML Header Footer

    - by Ravi
    Hello All, I'm generating a excel report in a XML Excel format. In this report I have to repeat the top 25 rows and bottom 10 rows on each page, like a header and a footer. Can you please guide me on the code that is required to accomplish this task. I'm using ColdFusion. Thank you. Ravi

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  • Pros and Cons of automating Excel using VBA vs .Net

    - by Andy
    I've been tasked with creating a financial planning tool in Excel that would benefit from some custom functions/macros. My initial reaction was to use VBA. I've used it to drive Excel before (say 5 years ago). But I then began to wonder if I would be better off using VSTO. Has anyone has experience using both techs and can list the pros and cons so that I can evaluate which course would be best.

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  • Read excel 2007 file with OLEDB using a specific culture

    - by Derek Ekins
    I am trying to read an excel 2007 file (using OLEDB) that has dates in the UK format. The server is (sometimes) set to US format and so the normal date format problems are in play. This is my connection string: Provider=Microsoft.ACE.OLEDB.12.0;Data Source=myfile.xlsx;Extended Properties="Excel 12.0 Xml;HDR=NO;IMEX=1" I want to ensure that the file is always opened using the en-GB culture. Is there a way to specify the culture using the connection string?

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  • Excel Macro to create sheets

    - by Harish
    I have a Excel sheet with two columns and I need to create new sheets based on the values of the first column.ie A B test1 Value21 test1 Values22 test2 Value21 test2 Value32 test3 Values32 IN this case I need to create three sheets namely test1,test2 and test3 Sheet 1 should contain test1 field and its corresponding values.Similarly sheet 2 and 3 should contain corresponding values. Can anyone help me in writing an Excel Macro for this

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  • Excel Date to String conversion

    - by Chaitanya MSV
    Hi I have a Date value like 01/01/2010 14:30:00 in a cell in Excel sheet. I want to convert that Date to Text and also want the Text to look exactly like Date. So a Date value of 01/01/2010 14:30:00 should look like 01/01/2010 14:30:00 but internally it should be Text. How can I do that in Excel? Thank you! Chaitanya

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  • Writing Text data File using C# to excel

    - by Joe
    Hello, New at C# using visual studio 2008 and trying to load an excel sheet with a text file. My current program puts the complete file in one cell. Is there a way to put each data point in its own cell. Having issues interfacing with excel to accomplish this task. Thanks Joe

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  • Import excel files with image in php/mysql

    - by Marcel
    Hi all! I want to make an import script which allows users to upload their excel file (extension not important) to my php application. The application should reconize a list of items (so far so good). The difficulty in this case is that the excel files contain images...I've read information about phpexcel library but it does not say anything about images. Anybody ideas? Regards, Marcel

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  • Javascript Chart to Excel

    - by George
    Hi I'm using highcharts to create some charts (pie, bar, etc...) using just Javascript. These charts do not use Flash or anything like that. Is it possible for me to convert the resulting HTML page with the Javascript chart to an excel document that properly shows the image? I've tried the standard change mime types for excel and so far I've only been able to export an HTML table on the page, but no chart.

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  • Populate a value in MS Excel

    - by acadia
    Hello, I have a Excel spreadsheet and I have 3 columns. column A, column B, Column C. In column B if there is a value 1 then in Column C it should populate as True and if in column B value is 0 then in C it should be False. How do I do this in MS Excel

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  • Excel Automation

    - by sltsta
    Hi All, Does everyone know how to create custom button in the excel that display simple window form in csharp language? For example: A button called "Show" in the excel toolbar that show messagebox pop up.

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  • excel - inserting data with OleDb c#

    - by Cmptrb
    Hi, my code is below: private string connectionstring = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\myexcel.xls; Extended Properties=""Excel 8.0;HDR=YES;"""; this is my connection string, the excel file is created writable (not readonly) either my command to insert any data is : string commandstring = "insert into [mus$] (name, surname) values('mickey', 'mouse')"; But my commandstring does not work and gives the error: "number of query values and destination fields are not the same" Where I do mistake ?

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