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• How do I create an index on a table that is non unique?

  - by RoboShop

  I want an index on a non-primary key column, but this column may have nulls in it. I find on a normal unique index, it (rightly so) only allows one null. Is that possible? and what is the syntax for this?

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• it takes 2 seconds to compile a hello world C++ project in netbeans (windows)

  - by Ethan

  I used code:blocks as the C++ IDE on Windows. I switched to netbeans 6.8 (with C/C++ plugin, MinGW, MSYS) recently, because netbeas have the nice feature of "checking syntax errors when typing" (same as working on Java or PHP projects). But the painful thing is that, it takes 2 seconds to compile a simple hello world project in netbeans. Any trick to make it as fast as code:blocks, or at least make the compiling time no more than 0.5 second?

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• Mysql change column details

  - by Ankur

  I am trying to redefine the number of varchars a column can have (in a MySQL db). I am doing alter table obj_details IMG_SRC IMG_SRC varchar(180); I want to change the number of characters that can be used in the column IMG_SRC to 180 (it is currently 100). But I get an error saying that I should check the syntax near IMG_SRC IMG_SRC varchar(180).

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• Float conditional in bash

  - by Werner

  Hi, in bash I need to compare two float numbers, one which I define in the script and the other read as paramter, for that I do: if [[ $aff -gt 0 ]] then a=b echo "xxx "$aff #echo $CX $CY $CZ $aff fi but I get the error: [[: -309.585300: syntax error: invalid arithmetic operator (error token is ".585300") What is wrong? Thanks

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• Divide sequence elements into pairs

  - by alex

  I have a sequence of 16 elements: 1,2,3,..., 16 ( or 2*n elements). Sequence elements always goes from 1 to length(sequence) that is sequence of 4 elements is 1,2,3,4. I want to write an algorithm which divide elements into pairs. For Example, 1-15 2-16 3-13 4-9 5-14 6-10 7-11 8-12 PS: no linq please :)

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• Are incremental Macro definition possible?

  - by Davorak

  I often find the following type of incremental definition useful: (define (foo) (display "bar")) (foo) ;prints bar (define foo (let ((bar foo)) (lambda () (display "foo") (bar)))) (foo) ;prints foobar How do I preform this type of incremental definition with macros? I could not get let-syntax to provide the same functionality. Currently I use plt scheme, but would like to see answers in different lisp implementations as well.

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• R - indirectly calling a matrix using a string

  - by Boris Senderovich

  Example: There is a matrix of data called VE There is a vector of string where the first element is the string VE. I need to indirectly call the string and be able to access data. For example if I need the 6th column of matrix VE then I want to do: Vector[1][,6] Essentially I need R to start reading those string as if they are the matrix names that are already in this page. I need this syntax to be dynamic because I am putting it in a loop.

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• how can i disable label or label from ib after displaying text on to it

  - by ven in Iphone world

  hi i would like to ask one intresting question i should disable or remove label from my view when certain event ocuurs how can i disable it can any one give me a syntax for that one i hope i will get answer

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• action script dynamic type?

  - by Bin Chen

  I am curious about code in my action script project: public var _p:Object ... in a function: public function WObject(pp:MovieClip) { _p = pp; _p.Play(); } The Play() function is in MovieClip but not Object, can action script allow such syntax?

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• Eclipse autocomplete not working in some Java files

  - by m_a_khan

  Hi, I have noticed that autocomplete is not working in some of java files in Eclipse. Also, the files where autocomplete is not working, display a hollow "J" as the icon for the Java file. The files where autocomplete is working, icon for java file is a filled "J" I am wondering if someone can point out what went wrong all of suddent, why the change in icons and why autocomplete and syntax highlighting is turned-off in the files with a hollow "J" icon? Thanks.

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• child objects in rdlc (Studio 2010RC)

  - by Jim

  Hi, I am attempting to reference a sub-object in a field expression in a studio 2010 report. This used to work in prior versions. When account references another object with properties the following used to work. =Fields!Account.Value.Name (Name is a property of the child object, Account is the parent object) The same expression syntax no longer works. How do I reference the properties of a sub-object in reporting services in an rdlc in studio 2010. Thanks

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• rails howto use environment constant in models and views?

  - by fenec

  i have my constants initialized in environment.rb like this : Rails::Initializer.run do |config| ... MAX_BID = 10 end i would like to use this constant in my models and views,what is the correct syntax? if a use it a model its says NameError: uninitialized constant User::MAX_BID i understand that it is looking for the constant inside the model , how can i tell explicitly that this constant is in the environment? thanks

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• MSSQL using SSH-tunnel from Visual Studio

  - by pbt

  Hi, I recently contacted a web host regarding support for external database access to a Microsoft SQL Database included in a package they offer. They replied saying that it is only possible with an SSH-tunnel. Is it possible to connect to a MS SQL database in Visual Studio using an SSH-tunnel? It is important for me to be able to access the database from my local machine (for debugging, generating LINQ classes, editing tables, etc). Or, how should I go about working with their database?

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• Passing direct parameters to a Controller#method when testing via RSpec

  - by gmile

  Normally to pass parameters via in RSpec we do: params[:my_key] = my_value get :my_method Where my_method deals with what it received from params. But in my controller I have a method, which takes args directly i.e.: def my_method(*args) ... end How do I call the method with those args from within the test? I've tried get :my_method(args) but Ruby interpreter complains about syntax error.

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• Quantize dct cofficents in matlab

  - by Bass

  hello i need to perform quantization to dct cofficents for an image, for a block size of 8*8 pixles in matlab. can you help me with the syntax, thank you.

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• What programming languages are good for statistics?

  - by Jason Baker

  I'm doing a bit more statistical analysis on some things lately, and I'm curious if there are any programming languages that are particularly good for this purpose. I know about R, but I'd kind of prefer something a bit more general-purpose (or is R pretty general-purpose?). What suggestions do you guys have? Are there any languages out there whose syntax/semantics are particularly oriented towards this? Or are there any languages that have exceptionally good libraries?

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• Problem in adding a page link [CakePHP]

  - by rajesh

  hi all actually when i use link syntax like <?php echo $html->link('Home', '/notes/index');?> but when i used <a href="/cake/cake_startab/notes/index/" alt="Home">Home </a> its woking why????

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• PHP array_search nor working?

  - by FFish

  What am I doing wrong here? $array = array('sky'=>'blue', 'grass'=>'green', 'sun'=>'yellow'); $key = array_search('green', $array); echo $key; error: Parse error: syntax error, unexpected T_DOUBLE_ARROW in /Applications/XAMPP/xamppfiles/htdocs/search-array.php on line 2

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• Bitwise operations in BC?

  - by user355926

  $ bc BC> ibase=2 BC> 110&101 // wanna get 100 (standar_in) 8: syntax error Wikipedia informs that the ops are "|, & and ^". It may be that they work only in certain BC-types or I misread something.

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• Drupal 7 Install Error

  - by Matthew

  Guys, I was hoping that someone can shed some light on why I am getting this error: Parse error: syntax error, unexpected '{' in /homepages/22/d223624283/htdocs/drupal_new/includes/install.core.inc on line 74 Could it be something that I missed as far as D& configurations? Thanks, Matt

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• How do I use the conditional operator?

  - by Jeremy Rudd

  I've always wondered how to write the "A ? B : C" syntax in a C++ compatible language. I think it works something like: (Pseudo code) If A > B C = A Else C = B Will any veteran C++ programmer please help me out?

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• how to declare variable in PostgreSQL

  - by user307880

  I try to declare a variable in a code like this, but it's doesn't work. Can you tell me what's the problem? ERROR: syntax error at or near "VARCHAR" LINE 2: p_country VARCHAR; DECLARE p_country VARCHAR; p_country : = ''; SELECT p_country;

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• Apache installation in folder with chinese characters in name

  - by Zsolti

  I would like to install an Apache server into a folder like c:\anything\???\anything2\ under windows. When I try to start the service it sais that: httpd: Syntax error on line xx of C:/anything/\xe6\x80\x98\xe6\x80\x99\e6\80\9a/anything2/apache/conf/httpd.conf: ServerRoot must be a valid directory Does anyone have a solution?

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• Good JavaScript IDE with JQuery support ?

  - by Pop Catalin

  I'm planing to start learning JQuery (among other things), so I'm looking for a good Javascript editor that can preferably provide some of the following features: Syntax coloring Contextual help for standard JS functions, JQuery functions and possibly custom ones. Some code completion. (optional) JS debugging Is there such and editor out here? or any that come close to this?

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• drupal rules module - add fields to email

  - by bert

  I am looking for the syntax to add node fields to the body of an email. Examples I looked at indicate the the format is: [content_type:content_type_title] However my email arrives with just the string : [content_type:content_type_title] Even better would be a PHP snippet that loads the node and dumps filed title and filed value into the body of the message.

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