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  • Adding characters to string

    - by Jamza
    I am currently trying to build a very basic serial shell with my arduino. I am able to get an output from the device using Serial.read() and can get the character it has outputted, but I cannot work out how to then add that character to a longer to form the full command. I tried the logical thing but it doesn't work: char Command[]; void loop(){ if(Serial.available() > 0){ int clinput = Serial.read(); Command = Command + char(clinput); } Can anybody help? Thank You.

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  • C#: String.IndexOf to FileStream.Seek

    - by pistacchio
    Hi, having a FileStream that I read with a StreamReader (it is a very large file), how can I set the Seek position of the FileStream to the first occurrence of a certain substring so that I can start reading this large file from a given point? Thanks

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  • An issue on object orientation in php

    - by rabidmachine9
    Hello people, I have come up to issues while I'm trying to write some classes, here is an example: I have this class called TwitterGrub and I cant call it like that: $c = new TwitterGrub(); $c->twitterDisplay(); here is the class itself: <?php class TwitterGrub{ function twitterCapture($user = 'username',$password = 'pass') { $ch = curl_init("https://twitter.com/statuses/user_timeline.xml"); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch,CURLOPT_TIMEOUT, 30); curl_setopt($ch,CURLOPT_USERPWD,$user . ":" . $password); curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0); curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0); $result=curl_exec ($ch); $data = strstr($result, '<?'); $xml = new SimpleXMLElement($data); return $xml; } function twitterDisplay($twitNum = 2){ $xml = $this::twitterCapture(); for($i= 0; $i<$twitNum; $i++){ echo "<div class= 'curvebox'>".$xml->status[$i]->text."</div>"; } } } ?> The problem is that everytime I want to change the username or password I have to jump back to class definition and that makes things not modular... and in many ways it feels wrong. So the question is what would be the proper way to chance my username and password through the objects interface and then call twitterDisplay() method with the new data?Hope that makes sense. Thanks in advance

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  • Object Oriented PHP books

    - by user275074
    Hi, I've realised just how rusty my knowledge of PHP 5 and advanced PHP programming is after completing some questions for a test. I seriously need to read a book or something. Any recommendations for PHP 5 books?

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  • Pass two string to Detail View from Search Array

    - by waqqas
    I am using a tableview with a search function and is populated by a plist. I want to pass 2 strings through to a DetailView. But I can only get the sting used to populate the cell to pass over. I have tried many variations but can't figure it out. Any help would be greatly appreciated. DetailView *nextLevel = [DetailView alloc]; NSString *valueString; NSString *selectedTitle; if (arraySearch == nil) { NSString *key = [arrayDataKeys objectAtIndex:indexPath.section]; NSArray *nameSection = [dictAllData objectForKey:key]; NSDictionary *dict = [nameSection objectAtIndex:indexPath.row]; valueString = [dict objectForKey:@"name"]; selectedTitle = [dict objectForKey:@"word"]; } else { valueString = [arraySearch objectAtIndex:indexPath.row]; **selectedTitle = [arraySearch objectAtIndex:indexPath.row];** //Obviously this is wrong but this is the line I need help with } nextLevel.title = valueString; nextLevel.itemname = valueString; nextLevel.itemWord = selectedTitle;

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  • object-oriented question

    - by user522962
    I am attempting to put all my database connections in 1 php file, rather than in each of my individual php pages. I have the following: //conn.php: <?php class conn { var $username = "name"; var $password = "password"; var $server = "localhost"; var $port = "3306"; var $databasename = "db"; var $tablename = "tablename"; var $connection; public function getConnected() { $this->connection = mysqli_connect( $this->server, $this->username, $this->password, $this->databasename, $this->port ); } } ?> // file.php: <?php require_once("conn.php"); class myClass{ public function con() { $conn = new conn(); $conn->getConnected(); } public function myF() { $stmt = mysqli_prepare($conn->connection, "SELECT * FROM $conn->tablename"); mysqli_stmt_execute($stmt); } } ?> I then call this as follows: $myNew = new myClass(); $myNew-con(); $myNew-myF(); When I call this, I get the following error: Undefined property: myClass::$connection What am I doing wrong?

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  • saving an image object in sql server database from action method

    - by user3532152
    [HttpPost] public void Test(HttpPostedFileBase file) { UsersContext db = new UsersContext(); byte[] image = new byte[file.ContentLength]; file.InputStream.Read(image, 0, image.Length); CrimeReport i = new CrimeReport { ImageId=1, ImageName="Anjli",ImageContent = image, Active=true }; db.CrimeReports.Add(i); db.SaveChanges(); } I am getting an exception on db.CrimeReports.Add(i);

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  • PHP object cannot find method

    - by Daniel Hertz
    Hello, So I have a very simple class that has a method called getThumbUrl() but when I try calling this method on an instance I get Notice: Undefined property: FlickrImage::$getFullUrl But it is clearly there. Here is the code of the function: public function getThumbUrl() { return "http://farm".$this->_farm.".static.flickr.com/".$this->_server."/".$this->_id."_".$this->_secret."_t.jpg"; } And here is where it fails: foreach($photos as $photo) { echo "<img src='$photo->getFullUrl()' />"; } Any ideas? Thanks!

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  • How to access child object properties?

    - by user1698312
    I'm trying to get the text property from an entry in a dialog with the following code: GtkWidget *dialog, *entry; gchar *text; entry = gtk_entry_new(); dialog = create_dialog(); ... gtk_container_child_get(GTK_CONTAINER(dialog), entry, "text", text, NULL); and i'm getting the following: (textview:3079): Gtk-WARNING **: /build/buildd/gtk+3.0-3.4.2/./gtk/gtkcontainer.c:919: container class `GtkDialog' has no child property named `text' The dialog contains a label and an entry with two buttons.

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  • Referencing An Object From ThisWorkbook

    - by Soo
    I need to populate several comboboxes in an Excel sheet upon loading it. I have the Workbook_Open() event set up on my ThisWorkbook code sheet in my VBA Editor. Now that the code isn't in my Sheet1 code sheet in my VBA Editor, the following code doesn't work: ComboBox.AddItem "hulkSMAASH!" How can I reference this combobox from my ThisWorkbook code sheet in my VBA Editor?

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  • Substr from end of string php?

    - by Gorostas
    I have this kind of array, i will make it very simple to understand $picture = ( 'artist2-1_thumb.jpg', 'artist2-2.jpg' , 'artist2-3_thumb.jpg', 'artist2-4.jpg', 'artist2-5_thumb.jpg'); Now i want use substr to get new array that only have thumb, to have new array like this $picturethumbs = ( 'artist2-1_thumb.jpg', 'artist2-3_thumb.jpg', 'artist2-5_thumb.jpg'); Can some substr but where to start?

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  • const object in c++

    - by Codenotguru
    I have a question on constant objects. In the following program: class const_check{ int a; public: const_check(int i); void print() const; void print2(); }; const_check::const_check(int i):a(i) {} void const_check::print() const { int a=19; cout<<"The value in a is:"<<a; } void const_check::print2() { int a=10; cout<<"The value in a is:"<<a; } int main(){ const_check b(5); const const_check c(6); b.print2(); c.print(); } void print() is constant member function of the class const_check, so according to the definition of constants if any attempt to change int a it should result in an error but the program works fine for me.I think i am having some confusion here, can anybody tell me why the compiler is not flagging it as an error??

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  • Java nullPointerException with getter and setters on an object

    - by 12345
    I'm getting a nullPointerException below. Can someone explain why? Thanks! private SpatialPooler spatialPooler; private Region region; private Column column33; public void setUp() { this.spatialPooler = new SpatialPooler(); this.region = new Region(30, 40, 6, 8, 1.0f, 1, 1); this.column33 = this.region.getColumn(3, 3); } public void addActiveColumn(Column activeColumn) { this.activeColumns.add(activeColumn); // nullPointerException here! } public Column getActiveColumn(int x, int y) { for (Column activeColumn : this.activeColumns) { if (activeColumn.getX() == x && activeColumn.getY() == y) { return activeColumn; } } return null; } // in a test class that is in the same package. public void testGetAndAddActiveColumn() { this.spatialPooler.addActiveColumn(this.column33); assertNull(this.spatialPooler.getActiveColumn(3, 3)); this.column33.setActiveState(true); assertEquals(this.column33, this.spatialPooler.getActiveColumn(3, 3)); }

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  • Detect some conflictive characters in a string with javascript

    - by FranQ
    Hello. I have a file input in a form that uploads a mp3 file, but I´d like to detect conflictive characters to my system in the filename, like ! @ or any other. All codes I´ve found replace these characters, but I just want to detect them to alert the user. I think it will be easy with regular expressions, but I dont know about them. I´m using jquery/javascript. Thanks in advance for your help Edit to improve my problem description: I´m working in a CodeIgniter application that allows user to upload mp3 files to the server. I use jQuery to manage client side forms. The CI upload class converts spaces in the file name to underscores and everything works. But testing the application I uploaded a mp3 file with a (!) in the name, and I got troubles with it. I just want to insert a javascript conditional before the file is uploaded to evaluate if the user´s filename contains a (!) (or any other I´d like to add later) to ask for the file to be renamed if it does.

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  • Difference between [object variable] and object.variable in Obj-C?

    - by John Smith
    I was working on a program today and hit this strange bug. I had a UIButton with an action assigned. The action was something like: -(void) someaction:(id) e { if ([e tag]==SOMETAG) { //dostuff } } What confuses me is that when I first wrote it, the if line was if (e.tag==SOMETAG) XCode refused to compile it, saying error: request for member 'tag' in 'e', which is of non-class type 'objc_object*' but I thought the two were equivalent. So under what circumstances are they not the same?

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  • Business object and linq2SQL

    - by Overdose
    What is the optimal way to write the code which interacts with DB using linq2SQL? I need to add some business logic to the entities. So I guess there are two ways: Write some wrapper class. The main minus is that many fields are the same, so i don't feel it as DRY style. Add business logic methods to linq2sql entities(these classes are partial) directly ???

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  • Copy one object to another

    - by developer
    Hi All, I have 2 tables, user and userprofile. The userprofile table has a lot of fields similar to the user table. What I need to do is, on click of a button I need to copy all the fields of user table to userprofile table. UserModel AttData = UserModel[0]; DataServices.Save((UserProfile)AttData.ProfileModel.Instance); UserModel[0] contains all the data in user table. I want to copy this data to AttData.ProfileModel.Instance. How can I do that?

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