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  • What does this java output mean?!

    - by Phil
    public class Arrys { private int[] nums; //Step 3 public Arrys (int arrySize) { nums = new int[arrySize]; } public int [] getNums (){ return nums; } } Test class: public class TestArrys { public static void main(String args[]) { //Step 4 Arrys arry = new Arrys(10); System.out.println("\nStep4 "); for(int index = 0; index < arry.getNums().length; index++) { System.out.print(arry.getNums()); } } } It's incredibly simple, that is why I think I'm doing something fundamentally wrong. All I want is to display the value of the array. This is what I get back. I am totally lost, there is nothing in my book that explains this nor does googling it help. Step4 [I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440

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  • Weird error: [Semantical Error] line 0, col 75 near 'submit': Error: 'submit' is not defined.

    - by luxury
    My controller like: /** * @Route("/product/submit", name="product_submit") * @Template("GaorenVendorsBundle:Product:index.html.twig") */ public function submitAction() { $em = $this->getDoctrine()->getManager(); $uid = $this->getUser()->getId(); $em->getRepository( 'GaorenVendorsBundle:Product' )->updateStatus( $uid, Product::STATUS_FREE, Product::STATUS_PENDING ); return $this->redirect( $this->generateUrl( 'product' ) ); } and the repo like: class ProductRepository extends EntityRepository { public function updateStatus($uid, $status, $setter) { $st = $this->getEntityManager()->getRepository( 'GaorenVendorsBundle:Product' ) ->createQueryBuilder( 'p' ) ->update( 'GaorenVendorsBundle:Product', 'p' ) ->set( 'p.status', ':setter' ) ->where( 'p.status= :status AND p.user= :user' ) ->setParameters( array( 'user' => $uid, 'status' => $status, 'setter' => $setter ) ) ->getQuery() ->execute() return $st; } when request the "submit" action, it prompts me "[Semantical Error] line 0, col 75 near 'submit': Error: 'submit' is not defined. ". "submit" is nothing to do with DOCTRINE orm query, why it appears in the error? I just can't figure out.Anyone could tell me?

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  • return type while using GMP.h header file

    - by Raveesh_Kumar
    While i m using gmp.h header file. i need a fuction which takes inputs of type mpz_t and return mpz_t type too. I m very beginner of using gmp.h So, Here is snaps follows of my approached code.... mpz_t sum_upto(mpz_t max) { mpz_t sum; mpz_init(sum); mpz_init(result); for(int i=0;i<=max-1;i++) mpz_add_ui(sum,sum,pow(2,i)); return sum; } but it will show error 1 ." pow has been not used in this scope.",although i have added math.h in very beginnig of the file. 2 . sum_upto declared as function returning an array... do tell as soon as possible. i have to complete my very big project....

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  • Why use third-party vector libraries at all?

    - by Patrick Powns
    So I'm thinking of using the Eigen matrix library for a project I'm doing (2D space simulator). I just went ahead and profiled some code with Eigen::Vector2d, and with bare arrays. I noticed a 10x improvement in assigning values to elements in the array, and a 40x improvement in calculating the dot products. Here is my profiling if you want to check it out, basically it's ~4.065s against ~0.110s. Obviously bare arrays are much more efficient at dot products and assigning stuff. So why use the Eigen library (or any other library, Eigen just seemed the fastest)? Is it stability? Complicated maths that would be hard to code by yourself efficiently?

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  • referencing struct fields in c with square brackets and an index instead of . and ->?

    - by lsiebert
    Assuming I have a structure such as: typedef struct { char * string1; char * string2; } TWO_WORDS; such that all the fields are of the same type, and my main has TWO_WORDS tw; can I reference string1 with tw[0] and string2 with two[1]? If so: is this part of the c standard? do i have to cast the struct to an array first? what about fields which are different sizes in memory what about fields which are different types but the same size? can you do pointer arithmetic within a structure? -

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  • Image GDI+ Error c#

    - by Argons
    First sorry for the english. I'm having an strange problem when I'm trying to save a bitmap ("Generic GDI+ error") from a picturebox in my win app, I know that this problem occurs when trying to save to a directory that has no permission, but in this case I'm trying to save it to a memoryStream. using (MemoryStream fotoStream = new MemoryStream()) { Bitmap imagen = picture1.Image as Bitmap; imagen.Save(fotoStream, imagen.RawFormat); //Error here byte[] array = fotoStream.ToArray(); fotoStream.Close(); } Any light on this?

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  • What's the difference between FireBug's conole.log() and console.debug() ?

    - by 6bytes
    A very simple code to illustrate the difference. var x = [0, 3, 1, 2]; console.debug('debug', x); console.log('log', x); // above display the same result x.splice(1, 2); // below display kind of a different result console.debug('debug', x); console.log('log', x); The javascript value is exactly the same but console.log() displays it a bit differently than before applying splice() method. Because of this I lost quite a few hours as I thought splice is acting funny making my array multidimensional or something. I just want to know why does this work like that. Does anyone know? :)

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  • The Cash or Credit problem

    - by Josh K
    If you go to a store and ask "Cash or Credit?" they might simply say "Yes." This doesn't tell you anything as you posed an OR statement. if(cash || credit) With humans it's possible that they might respond "Both" to that question, or "Only {cash | credit}." Is there a way (or operator) to force the a statement to return the TRUE portions of a statement? For example: boolean cash = true; boolean credit = true; boolean cheque = false; if(cash || credit || cheque ) { // In here you would have an array with cash and credit in it because both of those are true }

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  • Using Ruby to scan through a string

    - by nekosune
    I am trying to create a regex to gather info from strings that look like this: A22xB67-E34... for any number. I have the regex: @spaceCode = "[A-Z]([A-Z0-9][0-9]|[0-9])" @moveCode=/^(?<one>#{@spaceCode})((?<mode>x|\-)(?<two>#{@spaceCode}))+$/ However I get: s="A11-A22xA33".scan(@moveCode) => [["A11", "11", "xA33", "x", "A33", "33"]] which is most definatly NOT what I want. The string could be any length of C22 etc, with either x or - as the seperator, and put it into an array like: ['A22','x',B22','-'.......] Examples: "A22xB23-D23xE25" => ['A22','x','B23','=','D23','E25;] "AA2xA9-A1" => ['AA2','x','A9','-','A1']

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  • Multiple row insertion in a faster way

    - by Cyborgo
    Hi, I am using rails and I am trying to insert new rows into the table. The data comes from a text file and I created hash with one of the attribute as key. Then I find all the keys that are currently not in the table. Then I need to insert all of them into the table with all the attributes that I saved in hash. newvals.each{ |x| author = Author.create(:first => x, :second => hash[x][0], :third => hash[x][1]) author.save } This has lot of overhead as it makes an SQL update one at time. The newals array is usually quite big around the size of 20-30k. I know create can insert multiple objects at once, but I cant seem to figure out how. Is there any way to get this done. Thanks.

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  • jQuery sparklines iterate over div

    - by ßee
    I have an array of divs and I want to iterate over each div and pass it to sparklines. like so: var divs = $("#wrapper>div"); var data = ["1:2:3:4", "4:3:2:3:1"]; var i; for(i = 0; i<data.length; i++){ divs[i].sparkline(data[i]); } I get the error "divs[i].sparkline" is not a function. But if I do this divs.sparkline([1,2,3,4]); its fine all the divs get the linegraph but with the same data. Does anyone have any suggestions but how to use sparkline when iterating over divs? Thanks!

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  • numberOfSectionsInTable isn't called when [arr count] is returned

    - by user315471
    When I try returning the count of my newsItems array it breaks my application. I used NSLog to find out what the value of the newsItems count was when I returned 1. Here is from NSLog 2010-04-13 07:48:40.656 RSS Feed[453:207] Values of num items 31 2010-04-13 07:48:40.656 RSS Feed[453:207] Number of items 31 Does anyone know why returning [newsItems count] would cause my application to break? - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { NSLog(@"Values of num items %d",[newsItems count]); NSInteger *length = (NSInteger *)[newsItems count]; NSLog(@"Number of items %d",length); return 1; //return [newsItems count]; //This keeps breaking it for some reason }

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  • How to copy a structure with pointers to data inside (so to copy pointers and data they point to)?

    - by Kabumbus
    so I have a structure like struct GetResultStructure { int length; char* ptr; }; I need a way to make a full copy of it meaning I need a copy to have a structure with new ptr poinnting on to copy of data I had in original structure. Is It any how possible? I mean any structure I have which contains ptrs will have some fields with its lengths I need a function that would copy my structure coping all ptrs and data they point to by given array of lengthes... Any cool boost function for it? Or any way how to create such function?

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  • Symfony 2 form repeated validation in Entity with annotation

    - by Sukhrob
    My question is "How can I do form repeated validation in Entity with annotation?". I have an Account entity with (email, password and confirmPassword) attributes. When a new user registers a new account, he/she has to fill in email, password and confirmPassword fields. Obviously, password and confirmPassword fields must match. I saw an example of this validation with pure php (form builder) in Stachoverflow like below. $builder->add('password', 'repeated', array( 'type' => 'password', 'first_name' => 'Password', 'second_name' => 'Password confirmation', 'invalid_message' => 'Passwords are not the same', )); But, this is not what I want. I want this functionality with annotation in my Account entity. Maybe * @Assert\Match( * matchField = "password", * message = "The password confirmation does not match password." * ) protected $confirmPassword;

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  • JavaScript: filter() for Objects

    - by AgileMeansDoAsLittleAsPossible
    ECMAScript 5 has the filter() prototype for Array types, but not Object types, if I understand correctly. How would I implement a filter() for Objects in JavaScript? Let's say I have this object: var foo = { bar: "Yes" }; And I want to write a filter() that works on Objects: Object.prototype.filter = function(predicate) { var result = {}; for (key in this) { if (this.hasOwnProperty(key) && !predicate(this[key])) { result[key] = this[key]; } } return result; }; This works when I use it in jsfiddle (http://jsfiddle.net/MPUnL/4/), but when I add it to my site that uses jQuery 1.5 and jQuery UI 1.8.9, I get JavaScript errors in FireBug.

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  • AJAX - how to make autocomplete/autosuggestion and show results outside form, in table

    - by michael85
    hello im trying to make a simple page with search engine. i read, that if i want to implement autocomplete/autosuggest with form, i have to use ajax. thats ok for me. there are a lot solutions on the intenret, but unfortunetly all of them is the same script :/ and thats fine for me :) but i want to go further. i want to show autosuggest results in table for example below search form. the data is stored in a simple array (eventualy, source mysql) i know that kind of script isnt easy to write, so i ask you to give me a hint or something. trivial solution is use php, but this needs submit button. help, im stuck :)

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  • Working with sets of rows in (My)SQL and comparing values

    - by Pep.
    Hello, I am trying to figure out the SQL for doing some relatively simple operations on sets of records in a table but I am stuck. Consider a table with multiple rows per item, all identified by a common key. For example: serial model color XX1 A blue XX2 A blue XX3 A green XX5 B red XX6 B blue XX1 B blue What I would for example want to do is: Assuming that all model A rows must have the same color, find the rows which dont. (for example, XX3 is green). Assuming that a given serial number can only point to a single type of model, find out the rows which that does not occur (for example XX1 points both to A and B) These are all simple logically things to do. To abstract it, I want to know how to group things by using a single key (or combination of keys) and then compare the values of those records. Should I use a join on the same table? should i use some sort of array or similar? thanks for your help

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  • Empty database output in CI

    - by den-javamaniac
    Hi. I'm building a simple app and trying to test DB result output. But unfortunately all I'm getting is an array of size 0. Here's the controller code excerpt: $data['query'] = $this->db->query('SELECT role_id, role_privilege FROM role'); $this->load->view('welcome_message', $data); And a view code excerpt: <?php echo count($query->result_array())."<br/>"; foreach ($query->result() as $row){ echo $row->role_id . '<br/>'; echo $row->role_privilege . '<br/>'; } echo 'Total result '.$query->num_rows(); ?> And what I get is next: 0 Total result Running query from a command line gives a 2 rowed output. Can someone point out what i'm missing?

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  • simple for loop not running

    - by NativeCoder
    for ( var i:int = 0 ; i < 1; i++) { for ( var j:int = 0 ; j < 1; j++) { if (shape[j][i] == 0 ) { pencil.graphics.beginFill(0); pencil.graphics.drawRect(10,10,5,5); pencil.graphics.endFill(); } } } i am trying to run this code where shape is an array 2*2 gives an error ReferenceError: Error #1069: Property 0 not found on Number and there is no default value. at Main() need help

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  • How to test processing a list of files within a directory using RSpec?

    - by John Topley
    I'm pretty new to the world of RSpec. I'm writing a RubyGem that processes a list of files within a specified directory and any sub-directories. Specifically, it will use Find.find and append the files to an Array for later output. I'd like to write a spec to test this behaviour but don't really know where to start in terms of faking a directory of files and stubbing Find.find etc. This is what little I have so far: it "should return a list of files within the specified directory" do end Any help much appreciated!

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  • C# - can you name a matrix with the contents of a string

    - by RHodgett
    Basically I have x amount of matrices I need to establish of y by y size. I was hoping to name the matrices: matrixnumber1 matrixnumber2..matrixnumbern I cannot use an array as its matrices I have to form. Is it possible to use a string to name a string (or a matrix in this case)? Thank you in advance for any help on this! for (int i = 1; i <= numberofmatricesrequired; i++) { string number = Convert.ToString(i); Matrix (matrixnumber+number) = new Matrix(matrixsize, matrixsize); }

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  • Solution to compiler warning for generic varargs

    - by TJR
    A puzzle from this blog. Similar to SO1445233. Given the following source listing, explain why the compiler is producing a warning at invocation to the list method and give a solution for removing the warning without resorting to @SuppressWarnings annotation. public class JavaLanguagePuzzle3 { public static void main(String[] args) { list("1", 2, new BigDecimal("3.5")); } private static <T> List<T> list(T... items) { return Arrays.asList(items); } } Warning: Type safety: A generic array of Object&Serializable&Comparable<?> is created for a varargs parameter

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  • PHP: Convert web-page to utf8

    - by Paul Tarjan
    I would like to only work with UTF8. The problem is I don't know the charset of every webpage. How can I detect it and convert to UTF8? <?php $url = "http://vkontakte.ru"; $ch = curl_init($url); $options = array( CURLOPT_RETURNTRANSFER => true, ); curl_setopt_array($ch, $options); $data = curl_exec($ch); // $data = magic($data); print $data; See this at: http://paulisageek.com/tmp/curl-utf8 What is magic()?

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  • pointer and malloc [closed]

    - by gcc
    How many methods/ways are there taking input by using with pointer and dynamic memory? Input: 3 1 2 n k l 2 1 2 p 4 55 62 * # x (x is stop value, first input always integer) Example code: p=malloc(sizeof(int)); scanf("%d",&num_arrays); while(1) { scanf("%c",&(*(p+i))); if(*(p+i)=='x') break; ++i; } "3" is stored in num_arrays. The other input values are stored in pointer[array].

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  • Convert Date MMDDYY to Date for database Insert

    - by lesponce
    I got an array with a date set as 071712 . no / slash characters for the date, no dash. nothing, just plain 071712 (coming from a text file). I need to convert the date so I can include it in a SqlServer insert statement. I'm calling a stored procedure for the insert. So far I have this: // This is not working so far. DateTime date = Convert.ToDateTime(fileLines[4]); (date will be used as a parm for the stored procedure)

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