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  • fread and fwrite are not recommended for use with structured data

    - by forest58
    A book beginning linux programming 3ed says "Note that fread and fwrite are not recommended for use with structured data.Part of the problem is that files written with fwrite are potentially nonportable between different machines." What does that mean exactly? what calls should I use if I want to write a portable structured data reader or writer? direct system calls?

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  • How to get php form data to pdf in table structure using WAMP

    - by Fero
    Hi I am displaying all the users in the form using php where the data are fetched from db. When i click on the icon all users data should be show in a pdf with a good table structure. i am hereby using fpdf to generate it. i created pdf but the records are not in formatted structure. How should this can be done. kindly advice. thanks in advance strong text

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  • Storing and managing video files

    - by Ajay
    What approach is considered to be the best to store and manage video files? As databases are used for small textual data, are databases good enough to handle huge amounts of video/audio data? Are databases, the formidable solution? Apart from size of hard disk space required for centrally managing video/audio/image content, what are the requirements of hosting such a server?

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  • "OR" Operator must be placed at end of previous line? (unexpected tOROP)

    - by akonsu
    I am running Ruby 1.9. This is a valid syntax: items = (data['DELETE'] || data['delete'] || data['GET'] || data['get'] || data['POST'] || data['post']) But this gives me an error: items = (data['DELETE'] || data['delete'] || data['GET'] || data['get'] || data['POST'] || data['post']) t.rb:8: syntax error, unexpected tOROP, expecting ')' || data['GET'] || data['get'] |... ^ Why?!

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  • Java - store sensitive data

    - by Mike
    Hello. I develop application with Java. I need to store some initial configuration data in some kind of file. I want my app to be able to read this data, but I don't want user to do so. Example : application loads IP from encrypted file. User sees like "dsda@#21da@" so he won't bother doing anything :) How should I do such a thing? Thanx!

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  • Export data to word from php with the headers on all the pages

    - by udaya
    Hi I am exporting data from php page to word document I received the result in word format but when the data's are in excess number then the header are not available for the consecutive page ex my first page has title Country Name Country uday India akila India my second page has no title such as name and title kiran pakisthan vikie america how to get the titles on the consecutive pagess

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  • Gnuplot - splot matrix csv data

    - by Jakub Czaplicki
    How can I plot (a 3D plot) a matrix in Gnuplot having such data structure. I cannot find a way to use the first row and column as a x and y ticks (or to ignore them) ,5,6,7,8 1,-6.20,-6.35,-6.59,-6.02 2,-6.39,-6.52,-6.31,-6.00 3,-6.36,-6.48,-6.15,-5.90 4,-5.79,-5.91,-5.87,-5.46 Is the splot 'data.csv' matrix the correct parameter to use ?

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  • Store data in DB as is, or escaped?

    - by Yegor
    Whats a better way to store textual data, such as comments, user profile fields that require them to type something in, etc? Store the escaped data right away (using htmlspecialchars in php for example), or put it thru the same function before its echoed out?

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  • Read hexa data from file

    - by confusedman
    I'm trying to read hexa data(color value ex. 0xffffffff) from txt file... but i don't know how to read it.... i declared the color value like 'uint color' and i want to change the value though txt file. if i use int data i can use 'atoi' function, but what can i use function for uint?

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  • Changing Data in ListView

    - by legr3c
    Hi In my app I use a ListView to display data from the database. The data changes sometimes, for example when the user applies new filters or changes the sorting method. I use AsyncTask to get the databsase cursor that points to the new data set because sometimes data needs to be loaded from the net which can take some time. What I do now looks something like this: private class updateTask extends AsyncTask<Void, Void, Void> { /* * runs on the UI thread before doInBackground */ @Override protected void onPreExecute(){ // prepare some stuff... } /* * runs in a separate thread * used for time-consuming loading operation */ @Override protected Void doInBackground() { //get new database cursor mCursor = mDbAdapter.getCursor(); return null; } /* * runs on the UI thread after doInBackground */ @Override protected void onPostExecute(Void result){ if(mCursor!=null){ MyActivity.this.startManagingCursor(mCursor); mCursorAdapter = new MyCustomCursorAdapter(MyActivity.this, mCursor); mListView.setAdapter(mCursorAdapter); } } } This works so far but I realize that creating a new CursorAdapter and calling setAdapter on my ListView each time isn't the correct way to do it. Also, after setAdapter the scroll position of the list is set back to the top. I found this post which describes how to do it properly. So now I want to do something like this: onCreate(){ // ... // create the CursorAdapter using null as the initial cursor MyCustomCursorAdapter cursorAdapter = new MyCustomCursorAdapter(this, null); mListView.setAdapter(cursorAdapter); // ... } private class updateTask extends AsyncTask<Void, Void, Void> { /* * runs on the UI thread before doInBackground */ @Override protected void onPreExecute(){ // prepare some stuff... } /* * runs in a separate thread * used for time-consuming loading operation */ @Override protected Void doInBackground() { //get new database cursor mCursor = mDbAdapter.getCursor(); return null; } /* * runs on the UI thread after doInBackground */ @Override protected void onPostExecute(Void result){ // this returns null! MyCustomCursorAdapter cursorAdapter = (MyCustomCursorAdapter)mListView.getAdapter(); Cursor oldCursor = cursorAdapter.getCursor(); if(oldCursor!=null){ MyActivity.this.stopManagingCursor(oldCursor); oldCursor.close(); } if(mCursor!=null){ MyActivity.this.startManagingCursor(mCursor); cursorAdapter.changeCursor(mCursor); } } } This however doesn't work for me because (MyCustomCursorAdapter)mListView.getAdapter(); always returns null. Why does this happen? What am I doing wrong? Edit: Some additional information: my adapter implements SectionIndexer. I don't really think that this has anything to do with my problem but it has caused me some troubles before so I thought I'd mention it.

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  • Writing csv header removes data from numpy array written below

    - by user338095
    I'm trying to export data to a csv file. It should contain a header (from datastack) and restacked arrays with my data (from datastack). One line in datastack has the same length as dataset. The code below works but it removes parts of the first line from datastack. Any ideas why that could be? s = ','.join(itertools.chain(dataset)) + '\n' newfile = 'export.csv' f = open(newfile,'w') f.write(s) numpy.savetxt(newfile, (numpy.transpose(datastack)), delimiter=', ') f.close()

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  • Scraping Google docs (can't use API)

    - by Andy Waite
    I'm building an iPhone app which needs a peice of meta data from a user's Google Spreadsheet. Unfortunately the meta data I need is not exposed by the API, so I will need to scrape it from the document's HTML source (it would not be present in any of the exported variants). Is there anyway to include authentication parameters in a call such as: http://spreadsheets.google.com/ccc?key=abc123&username=...&password=...

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  • Loading/Displaying large amount of data on webpage.

    - by jb
    I have a webpage which contains a table for displaying a large amount of data (on average from 2,000 to 10,000 rows). This page takes a long time to load/render. Which is understandable. The problem is, while the page is loading the PCs memory usage skyrockets (500mb on my test system is in use by iexplorer) and the whole PC grinds to a halt until it has finished, which can take a minute or two. IE hangs until it is complete, switching to another running program is the same. I need to fix this - and ideally i want to accomplish 2 things: 1) Load individual parts of the page seperately. So the page can render initially without the large data table. A loading div will be placed there until it is ready. 2) Dont use up so much memory or local resources while rendering - so at least they can use a different tab/application at the same time. How would I go about doing both or either of these? I'm an applications programmer by trade so i am still a little fizzy on the things I can do in a web environment. Cheers all.

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  • Render similar data in C# by grouping

    - by Ted
    I am trying to create some dynamic html out of some data from db. My data returned from db is: ApplicationName URL AppName1 URL1 AppName2 URL1 AppName2 URL2 AppName1 URL2 I want that all URL's for a single application should be rendered under one heading of ApplicationName. Like: AppName1 URL1 URL2 AppName2 URL1 URL2 Can anyone help me in the code for this?

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  • wanna store Object in MySQL database

    - by kandarp
    I have a variable in java which return type is Object(java.lang.Object). I want to store this variable value in MySQL database without casting in any other primitive data type. Is there any data type available in MySQL related to Object? If anybody knows, please reply at your earliest time. Thanks,

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  • transfer data from Excel to SQL Server

    - by Jason
    I have an Excel Spreadsheet that contains all my data that I need to put into an SQL Server database. I am fairly new o ASP.NET and have never had to export from Excel to SQL Server before. My Excel spreadsheets looks like this Trade Heading - ArtID - BusinessName - AdStyleCode - Address - Suburb In SQL Server I have created a table named "Listings" which is in this format intListingID - intCategoryID - BusinessName - ArtID - intAdCode -Address - Suburb What would be the best way to export the data from Excel and then import it into SQLServer 2005. Thanks...

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  • jQuery to store data for sessions

    - by Ted
    I am trying to use jQuery AJAX. What my requirement is, i wish to load user names from DB in dataset, convert it to JSON format and store it in memory or using jQuery data for use while a user is browsing my site, i.e for a session. This way I can use autocomplete or my own code to display data to user. Can anyone help me design such a scenario?

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  • Loading Dimension Tables - Methodologies

    - by Nev_Rahd
    Hello, Recently I been working on project, where need to populated Dim Tables from EDW Tables. EDW Tables are of type II which does maintain historical data. When comes to load Dim Table, for which source may be multiple EDW Tables or would be single table with multi level pivoting (on attributes). Mean: There would be 10 records - one for each attribute which need to be pivoted on domain_code to make a single row in Dim. Out of these 10 records there would be some attributes with same domain_code but with different sub_domain_code, which needs further pivoting on subdomain code. Ex: if i got domain code: 01,02, 03 = which are straight pivot on domain code I would also have domain code: 10 with subdomain code / version as 2006,2007,2008,2009 That means I need to split my source table with above attributes into two = one for domain code and other for domain_code + version. so far so good. When it comes to load Dim Table: As per design specs for Dimensions (originally written by third party), what they want is: for every single change in EDW (attribute), it should assemble all the related records (for that NK) mean new one with other attribute values which are current = process them to create a new dim record and insert it. That mean if a single extract contains 100 records updated (one for each NK), it should assemble 100 + (100*9) records to insert / update dim table. How good is this approach. Other way I tried to do is just do a lookup into dim table for that NK get the value's of recent records (attributes which not changed) and insert it and update the current one. What would be the better approach assembling records at source side for one attribute change or looking into dim table's recent record and process it. If this doesn't make sense, would like to elaborate it further. Thanks

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