Search Results

Search found 2219 results on 89 pages for 'constant learner'.

Page 3/89 | < Previous Page | 1 2 3 4 5 6 7 8 9 10 11 12  | Next Page >

  • Creating constant in Python

    - by zfranciscus
    Hi, Is there a way to declare a constant in Python. In java I will we can create constant in this manner: public static final String CONST_NAME = "Name"; What is the equivalent of the above java constant declaration in python ? Cheers,

    Read the article

  • MySQL & PHP Use of Undefined Constant

    - by Nik
    Alright, PHP is throwing this error (only in the logs): Error PHP Notice: Use of undefined constant department - assumed 'department' (line 5) PHP Notice: Use of undefined constant name - assumed 'name' (line 6) PHP Notice: Use of undefined constant email - assumed 'email' (line 7) PHP Notice: Use of undefined constant message - assumed 'message' (line 8) Lines 4-7 $department = mysql_real_escape_string($_POST[department]); $name = mysql_real_escape_string($_POST[name]); $email = mysql_real_escape_string($_POST[email]); $message = mysql_real_escape_string($_POST[message]); I think it has something to do with defining constants before defining them (how is this possible).

    Read the article

  • PHP: constant as variable in function

    - by m4recek
    I'm trying to use constant as a function paramter, is it possible to check type of this constant. Example of what I want: class ApiError { const INVALID_REQUEST = 200; } class Response { public function status(ApiError $status) { //function code here } } USE: $response = new Response(); $response->status(ApiError::INVALID_REQUEST); This shoud check that given $status is constant of class ApiError. Is something like this possible?

    Read the article

  • Why does my ReadyNas 4200 have a constant beep post disk failure

    - by swagner88
    Went to check on a high pitched constant beep coming from the server room and discovered that all the LED lights on the disks were black except one which had a constant green. Post a Re-boot nothing changed. Console indicated that that particular drive has failed. Pulled the drive out and BAM everything is fine. Except, the high pitched beep remains. Plan is currently to replace the drive with a new same size drive we happen to have purchased for expansion. My question is, what will this do? Will the NAS accept the new drive as a replacement for the failed one and decide to shut-up? The Manual for the device is almost to straight forward and says that I can just swap drives out as I need but I find that difficult to believe: http://www.readynas.com/download/documentation/HM/RN4200_HW_24May10.pdf

    Read the article

  • Constant beeping

    - by Bogi Juul Peterson
    My computer has a problem with beeping. I'll first tell you how it started: One night I decided to watch a cartoon, and I took some water and food with me to eat while I watch. I fell asleep and when I woke up I had spilled water all over my keyboard. I didn't react quickly, because it went unnoticed for about 1 and a half hours. When I noticed, I quickly put my laptop on a radiator to try to dry it. When I turned the computer on there was a constant beeping sound. I didn't know what caused it, and I'm still not sure, but I think it has something to do with the USB hub. If I let the computer stand for some hours without any USB connections, it's fine, but when I put any kind of USB device in, it starts beeping. The laptop keyboard doesn't work so I have to have some kind of USB device connected to use the computer. The beeping is going on while I'm writing this and it makes my computer lag so much that it can make delays from the keyboard be from 1 second to 10 seconds. I need this computer because I don't have the money to buy a new one, and I have to use this computer for homework and games. The beeping is constant, with less than a second between beeps. If anyone has a solution, please help.

    Read the article

  • reaching constant video bitrate by using ffmpeg

    - by sebastian
    We use ffmpeg and a transcoding script for transcoding and want to make some batch files which we can use for transcoding. For example I use a parameter called video_kbit and if I am writing in 30000 it should reach 30 Mbit. Of course if I use 6000 as parameter it should reach 6 MBit as well, so I have one script which reaches every video bitrate I want. As my settings are now, I only reach 18.1 Mbit. Only when I use 15000 as a parameter I am reaching my goal for a constant video bitrate of 15 MBit. If I use 8000 as parameter I get 10.1 MBit as a result. So under 15000, I get a higher bitrate and over 15000, I get a lower bitrate than I want. My presettings are: ffmpeg -threads "4" -i "$2" -f mp4 -c:v libx264 -crf 1 \ -bufsize 30000k -maxrate ${FC_PARAM_video_kbit}k \ -acodec libfaac -ac 2 -ab ${FC_PARAM_audio_kbit}k -ar 44100 \ -pix_fmt yuv420p -vf scale=${FC_PARAM_width}:${FC_PARAM_height} -y "$3" And I am using these parameters: FC_PARAM_video_kbit = 30000 FC_PARAM_audio_kbit = 192 FC_PARAM_width = 1920 FC_PARAM_height = 1080 I have tried using a higher bufsize and using profile:v and level settings, but nothing got me near the constant video bitrate of 30000 Mbit. Do you guys have any ideas or suggestions for a better way to reach my goal?

    Read the article

  • Strange Behaviour in Swift: constant defined with LET but behaving like a variable defined with VAR

    - by Sam
    Stuck on the below for a day! Any insight would be greatly appreciated. The constant in the first block match0 behaves as expected. The constant defined in the second block does not behave as nicely in the face of a change to its "source": var str = "+y+z*1.0*sum(A1:A3)" if let range0 = str.rangeOfString("^\\+|^\\-|^\\*|^\\/", options: NSStringCompareOptions.RegularExpressionSearch){ let match0 = str[range0] println(match0) //yields "+" - as expexted str.removeRange(range0) println(match0) //yields "+" - as expected str.removeRange(range0) println(match0) //yields "+" - as expected } if let range1 = str.rangeOfString("^\\+|^\\-|^\\*|^\\/", options: NSStringCompareOptions.RegularExpressionSearch){ let match1 = str[range1] println(match1) //yields "+" as expected str.removeRange(range1) println(match1) //!@#$ OMG!!!!!!!!!!! a constant variable has changed! This prints "z" } The following are the options I can see: match1 has somehow obtained a reference to its source instead of being copied by value [Problem: Strings are value types in Swift] match1 has somehow obtained a closure to its source instead of just being a normal constant/variable? [Problem: sounds like science fiction & then why does match0 behave so well?] Could there be a bug in the Swift compiler? [Problem: Experience has taught me that this is very very very rarely the solution to your problem...but it is still in beta]

    Read the article

  • Cakephp 2.2 Blog Tutorial undefined constant errors

    - by user1741925
    Have copy pasted the code from Blog tutorial in cakephp 2.2 but its not working. Getting the following errors. Notice (8): Use of undefined constant Html Notice (8): Use of undefined constant Form Notice (8): Use of undefined constant posts Notice (8): Use of undefined constant all Notice (8): Undefined index: all Below is the code for PostsController and index.ctp. <?php class PostsController extends AppController { public $helpers = array(’Html’, ’Form’); public function index() { $this->set(’posts’, $this->Post->find(’all’)); } public function view($id = null) { $this->Post->id = $id; $this->set(’post’, $this->Post->read()); } } ?> index.ctp <h1>Blog posts</h1> <table> <tr> <th>Id</th> <th>Title</th> <th>Created</th> </tr> <?php foreach ($posts as $post): ?> <tr> <td><?php echo $post[’Post’][’id’]; ?></td> <td> <?php echo $post[’Post’][’title’]; ?> </td> <td><?php echo $post[’Post’][’created’]; ?></td> </tr> <?php endforeach; ?> <?php unset($post); ?> </table>

    Read the article

  • Add constant value to numeric XML attribute

    - by Dave Jarvis
    Background Add a constant value to numbers matched with a regular expression, using vim (gvim). Problem The following regular expression will match width="32": /width="\([0-9]\{2\}\)" Question How do you replace the numeric value of the width attribute with the results from a mathematical expression that uses the attribute's value? For example, I would like to perform the following global replacement: :%s/width="\([0-9]\{2\}\)"/width="\1+10"/g That would produce width="42" for width="32" and width="105" for width="95". Thank you!

    Read the article

  • How can I dereference a hashref constant?

    - by makenai
    Let's say I have a hashref constant like the following: use constant DOGS => { Lassie => 'collie', Benji => 'mutt', Scooby => 'great dane', Goofy => '???' }; How can I dereference it properly to get say.. they keys out of it? warn ref DOGS; # HASH at untitled line 12. warn keys( %{DOGS} ); # Warning: something's wrong (empty list) warn keys( DOGS ); # Type of arg 1 to keys must be hash (not constant item) The following is the only way I can seem to make it work: my $dogs = DOGS; warn keys( %$dogs ); # LassieBenjiGoofyScooby at untitled line 15. What am I doing wrong?

    Read the article

  • How to dereference a hashref constant?

    - by makenai
    Let's say I have a hashref constant like the following: use constant DOGS => { Lassie => 'collie', Benji => 'mutt', Scooby => 'great dane', Goofy => '???' }; How can I dereference it properly to get say.. they keys out of it? warn ref DOGS; # HASH at untitled line 12. warn keys( %{DOGS} ); # Warning: something's wrong (empty list) warn keys( DOGS ); # Type of arg 1 to keys must be hash (not constant item) The following is the only way I can seem to make it work: my $dogs = DOGS; warn keys( %$dogs ); # LassieBenjiGoofyScooby at untitled line 15. What am I doing wrong?

    Read the article

  • how to get a constant in java with class

    - by vincent
    basically I need to get a constant for a class however I have no instance of the object but only its class. In PHP I would do constant(XYZ); Is there a similar way of retrieving a constant in JAVA? I need it to facilitate a dynamic getMethod call Class parameterType = Class.forName(class_name); object.setProperty(field name, field value, parameterType); the set property method would then get the correct method and set the specified property, however I cant get a method which has int as parameter type without using Interger.TYPE

    Read the article

  • Sony Vaio laptop constant "bi" noise when on battery

    - by Dominick1978
    I have sony vaio vgn fs215s laptop. When I use it with battery alone it makes a constant "bi" noise that gets louder on more power consuming tasks. Sometimes on startup the screen goes black before xp logo. Then i hear the windows startup sound but sill black screen. I bypassed the xp logo (via msconfig) and it gets me all the way ok but the noise is still there. There is no problem when the laptop is plugged to a socket. What do you think is the problem and how do i fix it (how much money)? Thanks a lot.

    Read the article

  • integer constant does 'not reduce to an integer'

    - by Dan Morgan
    I use this code to set my constants // Constants.h extern NSInteger const KNameIndex; // Constants.m NSInteger const KNameIndex = 0; And in a switch statement within a file that imports the Constant.h file I have this: switch (self.sectionFromParentTable) { case KNameIndex: self.types = self.facilityTypes; break; ... I get error at compile that read this: "error:case label does not reduce to an integer constant" Any ideas what might be messed up?

    Read the article

  • Rake uninitialized constant RDoc::RDoc

    - by Joshua
    When ever I run make I get this 'uninitialized constant RDoc::RDoc' error rake -T (in Main) rake aborted! uninitialized constant RDoc::RDoc C:/Ruby186/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile' (See full trace by running task with --trace) --edit Running --trace it seems the only non rails code is from rdoc_rails. Since other people seem to be able to run it fine I assume I am missing a gem or plugin but I can't figure out which.

    Read the article

  • Delphi: All constants are constant, but some are more constant than others?

    - by Ian Boyd
    Consider: clHotlight: TColor = $00FF9933; clLink = clHotLight; //alias of clHotlight [Error] file.pas: Constant expression expected and the alternate wording that works: clHotlight = TColor($00FF9933); clLink = clHotLight; //alias of clHotlight Explain. Then consider: AdministratorGUID: TGUID = '{DE44EEA0-6712-11D4-ADD4-0006295717DA}'; SuperuserGUID = AdministratorGUID; //alias of AdministratorGUID [Error] file.pas: Constant expression expected And fix.

    Read the article

  • Type-inferring a constant in C#

    - by Andreas Grech
    In C#, the following type-inference works: var s = "abcd"; But why can't the type be inferred when the variable is a constant? The following throws a compile-time exception: const var s = "abcd"; // <= Compile time error: // Implicitly-typed local variables cannot be constant

    Read the article

  • Flex: Constant strings in metadata

    - by Daniel Engmann
    I have something like public class Controller { [Observer("fetchEmployeesEvent")] public function fetchEmployees() : void { //doSomething } } and I want something like public class Controller { public static const FETCH_EMPLOYEES_EVENT : String = "fetchEmployeesEvent"; [Observer(FETCH_EMPLOYEES_EVENT)] public function fetchEmployees() : void { //doSomething } } My problem is that only the first code snippet works. Flex seems to ignore the constant FETCH_EMPLOYEES_EVENT in the metadata-tag. My question is: Is it somehow possible to use constant strings in metadata?

    Read the article

  • C++ WCHAR: Cannot allocate an array of constant size 0

    - by Rosarch
    I'm trying to create a WCHAR: LONG bufferSize = foo.bar() + 1; WCHAR wszBaz[bufferSize]; The compiler issues an error: error C2057: expected constant expression error C2466: cannot allocate an array of constant size 0 error C2133: 'wszBaz' unknown size What am I doing wrong? UPDATE: I added const but it still gives the same error: const LONG bufferSize = foo.bar() + 1; WCHAR wszBaz[bufferSize];

    Read the article

  • What is the difference between Constant Vertex Attributes and Uniforms?

    - by Samaursa
    According to the OpenGL ES 2.0 Programming Guide: A constant vertex attribute is the same for all vertices of a primitive, and therefore only one value needs to be specified for all the vertices of a primitive. For uniforms the book states: ...any parameter to a shader that is constant across either all vertices or fragments (but that is not known at compile time) should be passed in as a uniform. I've always used uniforms for data that is constant for a primitive but now it appears that attributes can also be used in the same way. Is there more to constant vertex attribute than simply 'they are the same as uniforms'?

    Read the article

  • C++ : Declaring the array size with a non-constant variable

    - by Jérôme
    I always thought that when declaring an array in C++, the size has to be a constant integer value. For instance : int MyArray[5]; // correct or const int ARRAY_SIZE = 6; int MyArray[ARRAY_SIZE]; // correct but int ArraySize = 5; int MyArray[ArraySize]; // incorrect Here is also what is explained in The C++ Programming Language, by Bjarne Stroustrup : The number of elements of the array, the array bound, must be a constant expression (§C.5). If you need variable bounds, use a vector(§3.7.1, §16.3). For example: void f(int i) { int v1[i]; // error : array size not a constant expression vector<int> v2[i]; // ok } But to my big surprise, the code above does compile fine on my system ! Here is what I tried to compile : void f(int i) { int v2[i]; } int main() { int i = 3; int v1[i]; f(5); } I got no error ! I'm using GCC v4.4.0. Is there something I'm missing ?

    Read the article

< Previous Page | 1 2 3 4 5 6 7 8 9 10 11 12  | Next Page >