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• I need to create a very large array of bits/boolean values. How would I do this in C/C++?

  - by Eddy

  Is it even possible to create an array of bits with more than 100000000 elements? If it is, how would I go about doing this? I know that for a char array I can do this: char* array; array = (char*)malloc(100000000 * sizeof(char)); If I was to declare the array by char array[100000000] then I would get a segmentation fault, since the maximum number of elements has been exceeded, which is why I use malloc. Is there something similar I can do for an array of bits?

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• How can we calculate where the aaray ends?

  - by udaya

  Hi I have an array result like this, example 1: Array ( [0] =>15 [1] => 16 [2] => 17 [3] => 18 ) example 2: Array ( [0] =15 [1] = 16 [2] = 17 [3] = 18 [4] = 18 ) The first array ends at array[3] The second array ends at array[4] How to calculate where the array ends Is there any function to calculate this

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• How do I randomly fill an array in Java?

  - by Kat

  I'm writing a program that creates a 2D array from a integer n. I then have to fill the array with values from 1 to the n*n array size and check to see if it is a magic square. The way I am doing it now fills the array in order from 1 to n*n array size. How can I make that random? My code: System.out.print("Enter an whole number: "); int n = scan.nextInt(); int [][] magic = new int [n][n]; for (int row = 0; row < magic.length; row++) { for(int col = 0; col < magic[row].length; col++) magic[row][col] = ((row * n) + 1) + col; }

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• Letting a new PHP page know a new POST value is an Array?

  - by Wintermute

  I have a page that creates an associative array, then passes it as a hidden value to a new PHP page. I have a foreach loop waiting to iterate through it but it coughs up an "invalid argument" error, as if the page doesn't know the value it's working with is an array (Despite "print" showing simply "Array"). This is essentially what I have: //Hidden input to be passed to the next page print "<input type=\"hidden\" name=\"price_list\" value=\"$item_list\"> //Code on the second page for the foreach loop extract($_POST); foreach($price_list as $name=>$price) { ... } But I am simply given "Warning: Invalid argument supplied for foreach() in /home/cut/mg299/public_html/PHP/invoice.php on line 17". The array works fine, as I can iterate on the previous page, and other values are parsed fine to this second page. Do I need to 'reinitialise' this array value?

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• How do you retrieve the array adapter currently set for a spinner? Android OS, Droid

  - by Sean

  Looking to create a menu toggle that switches between two possible arrays for a spinner. For example, if the spinner is set to show array A, then when I press this menu button, I want the spinner to be set to array B. If I press it again, I want it to be set back to array A. I can handle the if/then statements and all, but how do I call the spinner's array adapter? I know how to call its value using getSelectedItemPosition(); but is there a similar method for retrieving WHICH array it is currently set to?

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• How can I extract values out of this array?

  - by Jagira

  Array ( [status] => success [abc] => Array ( [0] => Array ( [name] => John Doe [age] => 23) [1] => Array ( [name] => John Doe_1 [age] => 23) [2] => Array ( [name] => John Doe_2 [age] => 23) ) ) When I try foreach($stories as $story){ } It returns an error.

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• Fastest way to zero out a 2d array in C?

  - by Eddy

  I want to repeatedly zero a large 2d array in C. This is what I do at the moment: for(j = 0; j < n; j++) { for(i = 0; i < n; i++) { array[i][j] = 0; } } I've tried using memset: memset(array, 0, sizeof(array)) But this only works for 1D arrays. When I printf the contents of the 2D array, the first row is zeroes, but then I got a load of random large numbers and it crashes.

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• new >> how would i read a file that has 3 columns and each column contains 100 numbers into an array

  - by user320950

  int exam1[100];// array that can hold 100 numbers for 1st column int exam2[100];// array that can hold 100 numbers for 2nd column int exam3[100];// array that can hold 100 numbers for 3rd column void main() { ifstream infile; int num; infile.open("example.txt");// file containing numbers in 3 columns if(infile.fail()) // checks to see if file opended { cout << "error" << endl; } while(!infile.eof()) // reads file to end of line { for(i=0;i<100;i++); // array numbers less than 100 { while(infile >> [exam]); // while reading get 1st array or element ???// how will i go read the next number infile >> num; } } infile.close(); }

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• How can we make a single dimension array to multidimensional Hierarchical ?

  - by Chetan sharma

  I have an single array of Hierarchical categories. Index of the array is the category_id like:: [8846] => Array ( [category_id] => 8846 [title] => Tsting two [description] => Tsting two [subtype] => categories [type] => object [level] => 2 [parent_category] => 8841 [tags] => new [name] => Tsting two ) each value has its parent_category value, I have around 500 elements in the array, what is the best way to make it. Process i followed: krsort categories array, so that all the child categories are at the beginning, then function makeHierarchical() { foreach($this->categories as $guid => $category) { if($category['level'] != 1) $this->multilevel_categories[$category['parent_category']][$guid] = $category; } } but this is not working, it does it only for first level. Can someone point out me the error.

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• why my array is losing it's contents when I refresh the page?

  - by Fernando SBS

  I have created an: var checkboxFarm = new Array(); then I want to record a checkbox status in that array, as there are 11 checkboxes. Button.addEventListener("click", function() { rp_farmAtivada(index); }, false); when clicked change the variable in the array: function rp_farmAtivada(index) { checkboxFarm[index] = !checkboxFarm[index]; }; but every time I refresh the page it loses all the checkboxes status and I'm aware that all that array gets the "undefined" value. the checkboxFarm array is defined in the beginning of the script, so it should have a global scope. Am I missing something?

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• How do I convert a Python list of lists of lists into a C array by using ctypes?

  - by pc05

  As seen here How do I convert a Python list into a C array by using ctypes? this code will take a python array and transform it to a C array. import ctypes arr = (ctypes.c_int * len(pyarr))(*pyarr) Which would the way of doing the same with a list of lists or a lists of lists of lists? For example, for the following variable list3d = [[[40.0, 1.2, 6.0, 0.3], [50.0, 4.2, 0, 0]], [[40.0, 1.2, 6.0, 0.3], [50.0, 4.2, 0, 0]], [[40.0, 1.2, 6.0, 0.3], [50.0, 4.2, 0, 0]]] I have tried the following with no luck: ([[ctypes.c_double * 4] *2]*3)(*list3d) # *** TypeError: 'list' object is not callable (ctypes.c_double * 4 *2 *3)(*list3d) # *** TypeError: expected c_double_Array_4_Array_2 instance, got list Thank you! EDIT: Just to clarify, I am trying to get one object that contains the whole multidimensional array, not a list of objects. This object's reference will be an input to a C DLL that expects a 3D array.

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• How to make an mutable C array for this data type?

  - by mystify

  There's this instance variable in my objective-c class: ALuint source; I need to have an mutable array of OpenAL Sources, so in this case probably I need a mutable C-array. But how would I create one? There are many questions regarding that: 1) How to create an mutable C-array? 2) How to add something to that mutable C-array? 3) How to remove something from that mutable C-array? 4) What memory management pitfalls must I be aware of? Must i free() it in my -dealloc method? And yes, I think this is something for the nice community wiki...

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• Make an array of two.

  - by marharépa

  Hello! I'd like to make an array which tells my site's pages where to show in PHP. In $sor["site_id"] i've got two or four chars-lenght strings. example: 23, 42, 13, 1 In my other array (called to $pages_show) i want to give all the site_ids to an other id. $parancs="SELECT * FROM pages ORDER BY id"; $eredmeny=mysql_query($parancs) or die("Hibás SQL:".$parancs); while($sor=mysql_fetch_array($eredmeny)) { $pages[]=array( "id"=>$sor["id"], "name"=>$sor["name"], "title"=>$sor["title"], "description"=>$sor["description"], "keywords"=>$sor["keywords"] ); // this makes my pages array with the information about that page. $shower = explode(", ",$sor["site_id"]); // this is explode my site_id $pages_show[]=array( "id"=>$sor["id"], "where"=>$shower //to 'where' i want to put all the explode's elements one-by-one, to get the result like down ); This script gives me the following result: Array (3) 0 => Array (2) id => "29" where => Array (2) 0 => "17" 1 => "16" 1 => Array (2) id => "30" where => Array (1) 0 => "17" 2 => Array (2) id => "31" where => Array (1) 0 => "17" But in this case I'd like to be this: Array (4) 0 => Array (2) id => "29" where => "17" 1 => Array (2) id => "29" where => "16" 2 => Array (2) id => "30" where => "17" 3 => Array (2) id => "31" where => "17" Thanks for your help.

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• Problems with 3D Array for Voxel Data

  - by Sean M.

  I'm trying to implement a voxel engine in C++ using OpenGL, and I've been working on the rendering of the world. In order to render, I have a 3D array of uint16's that hold that id of the block at the point. I also have a 3D array of uint8's that I am using to store the visibility data for that point, where each bit represents if a face is visible. I have it so the blocks render and all of the proper faces are hidden if needed, but all of the blocks are offset by a power of 2 from where they are stored in the array. So the block at [0][0][0] is rendered at (0, 0, 0), and the block at 11 is rendered at (1, 1, 1), but the block at [2][2][2] is rendered at (4, 4, 4) and the block at [3][3][3] is rendered at (8, 8, 8), and so on and so forth. This is the result of drawing the above situation: I'm still a little new to the more advanced concepts of C++, like triple pointers, which I'm using for the 3D array, so I think the error is somewhere in there. This is the code for creating the arrays: uint16*** _blockData; //Contains a 3D array of uint16s that are the ids of the blocks in the region uint8*** _visibilityData; //Contains a 3D array of bytes that hold the visibility data for the faces //Allocate memory for the world data _blockData = new uint16**[REGION_DIM]; for (int i = 0; i < REGION_DIM; i++) { _blockData[i] = new uint16*[REGION_DIM]; for (int j = 0; j < REGION_DIM; j++) _blockData[i][j] = new uint16[REGION_DIM]; } //Allocate memory for the visibility _visibilityData = new uint8**[REGION_DIM]; for (int i = 0; i < REGION_DIM; i++) { _visibilityData[i] = new uint8*[REGION_DIM]; for (int j = 0; j < REGION_DIM; j++) _visibilityData[i][j] = new uint8[REGION_DIM]; } Here is the code used to create the block mesh for the region: //Check if the positive x face is visible, this happens for every face //Block::VERT_X_POS is just an array of non-transformed cube verts for one face //These checks are in a triple loop, which goes over every place in the array if (_visibilityData[x][y][z] & 0x01 > 0) { _vertexData->AddData(&(translateVertices(Block::VERT_X_POS, x, y, z)[0]), sizeof(Block::VERT_X_POS)); } //This is a seperate method, not in the loop glm::vec3* translateVertices(const glm::vec3 data[], uint16 x, uint16 y, uint16 z) { glm::vec3* copy = new glm::vec3[6]; memcpy(&copy, &data, sizeof(data)); for(int i = 0; i < 6; i++) copy[i] += glm::vec3(x, -y, z); //Make +y go down instead return copy; } I cannot see where the blocks may be getting offset by more than they should be, and certainly not why the offsets are a power of 2. Any help is greatly appreciated. Thanks.

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• php getting unique values of a multidimensional array

  - by Mark

  I have an array like this: $a = array ( 0 => array ( 'value' => 'America', ), 1 => array ( 'value' => 'England', ), 2 => array ( 'value' => 'Australia', ), 3 => array ( 'value' => 'America', ), 4 => array ( 'value' => 'England', ), 5 => array ( 'value' => 'Canada', ), ) How can I remove the duplicate values so that I get this: $a = array ( 0 => array ( 'value' => 'America', ), 1 => array ( 'value' => 'England', ), 2 => array ( 'value' => 'Australia', ), 4 => array ( 'value' => 'Canada', ), ) I tried using array_unique, but that doesn't work due to this array being multidimensional, I think. Thanks!

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• wsdl return an array of complex types

  - by Anand

  hi, I have defined a web service that will return the data from my mysql data base. I have written the web service in php. Now I have defined a complex type as follows: $server->wsdl->addComplexType( 'Category', 'complexType', 'struct', 'all', '', array( 'category_parent_id' => array('name' => 'category_parent_id', 'type' => 'xsd:int'), 'category_child_id' => array('name' => 'category_child_id', 'type' => 'xsd:int'), 'category_list' => array('name' => 'category_list', 'type' => 'xsd:int') ) ); The above complex type is a row in a table in my database. Now my function must send an array of these rows so how do I achieve the same My code is as follows: require_once('./nusoap/nusoap.php'); $server = new soap_server; $server-configureWSDL('productwsdl', 'urn:productwsdl'); // Register the data structures used by the service $server-wsdl-addComplexType( 'Category', 'complexType', 'struct', 'all', '', array( 'category_parent_id' = array('name' = 'category_parent_id', 'type' = 'xsd:int'), 'category_child_id' = array('name' = 'category_child_id', 'type' = 'xsd:int'), 'category_list' = array('name' = 'category_list', 'type' = 'xsd:int') ) ); $server-register('getaproduct', // method name array(), // input parameters //array('return' = array('result' = 'tns:Category')), // output parameters array('return' = 'tns:Category'), // output parameters 'urn:productwsdl', // namespace 'urn:productwsdl#getaproduct', // soapaction 'rpc', // style 'encoded', // use 'Get the product categories' // documentation ); function getaproduct() { $conn = mysql_connect('localhost','root',''); mysql_select_db('sssl', $conn); $sql = "SELECT * FROM jos_vm_category_xref"; $q = mysql_query($sql); while($r = mysql_fetch_array($q)) { $items[] = array('category_parent_id'=$r['category_parent_id'], 'category_child_id'=$r['category_child_id'], 'category_list'=$r['category_list']); } return $items; } // Use the request to (try to) invoke the service $HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : ''; $server-service($HTTP_RAW_POST_DATA);

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• Windows 7 x64 Pro not indexing PDF content ?

  - by Wookai

  In an attemp to get rid of all the paper clutter that I receive each day, I started scanning and ORCing all my important documents last year. I was using Windows Desktop Search on Vista to index my "Administrative" folder in which I keep all these scanned documents, to be able to quickly retreive them when needed. I upgraded to Windows 7 RTM recently (I got the x64 Pro version, via the MSDN-AA channel of my university). Since then, it seems that the content of the PDFs is not indexed anymore. For example, I have the warranty for my GTX260 graphic card. In the PDF, using Acrobat Reader, I can search for the string "GTX260" and it finds the relevant lines. However, if I perform the same search in the folder containing the PDF, nothing is found. I checked in the indexing options, the folder is supposed to be indexed.

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• What desktop chipsets support AMD's Rapid Virtualization Indexing?

  - by netvope

  Rapid Virtualization Indexing (RVI) is a hardware virtualization feature that can potentially give significant performance improvement. Intel's equivalent is Extended Page Tables. See http://en.wikipedia.org/wiki/Rapid_Virtualization_Indexing for more details. My question is: Does RVI require motherboard or chipset support? If yes, what desktop chipsets support it? I've ordered a Phenom II CPU (which supports RVI) but I haven't bought the motherboard. I'll install XenServer or VMware ESXi (which both support RVI) on the new computer.

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• Problem with OWA search. Mailstore catalogues

  - by Anthony

  Dear All, I have trawled for the last few days but have not been able to come up with a solution; any help would be much appreciated. Exchange 2007 STD on Windows 2003 64Bit and users report search not working in OWA. So I first check indexing is enabled on the mail stores Get-MailboxDatabase |ft Name,IndexEnabled which all report true, So I try a test Test-ExchangeSearch [email protected] Which is a false -1 Ok, So I run the reset - resetsearchindex.ps1 this works and the event log reports the stores being crawled and finished. BUT- My complete catalogue data is 300kb - LOL! I wish! Obviously all tests fail so I do it manually; Stop indexing service, Delete catalogues. Restart Still no dice, This is where I’m up to, I have tried many different variations of the above and being through oodles of MS documentation Has anyone got any ideas?

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• perl array of array of hashes sorting

  - by srk

  @aoaoh; $aoaoh[0][0]{21} = 31; $aoaoh[0][0]{22} = 31; $aoaoh[0][0]{23} = 17; for $k(0.. $#aoaoh) { for $i(0.. $#aoaoh) { for $val (keys %{$aoaoh[$i][$k]}) { print "$val=$aoaoh[$i][$k]{$val}"; print "\n"; }} } output is 22=31 21=31 23=17 but i expect it to be 21=31 22=31 23=17 Please tell me where is this wrong.. Also how do i sort the values so that i get the output as 23=17 22=31 21=31 (if 2 keys have same value then key with higher value come first)

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• C pointer to array/array of pointers disambiguation

  - by Richard J. Terrell

  What is the difference between the following declarations: int* arr1[8]; int (*arr2)[8]; int *(arr3[8]); What is the general rule for understanding more complex declarations?

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• How to send array by post method

  - by GanChinHock.com

  Following is my sample form. <form METHOD="post" METHOD="post" ACTION="index.php" METHOD="post" METHOD="post" METHOD="post"> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="text" NAME="array[]" /> <input TYPE="submit" NAME="submit" VALUE="Submit" /> </form> Basically I have 10 inputs of array. Assume my domain is http://domain.com and the file above is index.php. I am trying to fill the form automatically by using the following method. http://domain.com/index.php?array[]=John&array[]=Kelly ... & array[]=Steven Unfortunately, it is not working. :(

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• Windows 7 Slow Searching

  - by Guy Thomas

  I have a new Windows 7 machine with twice as much RAM and a faster processor than my old Windows Server 2008 R2 Machine. I am disappointed that searching amongst my 10,000 image files takes twice as long on my new Windows 7 machine. Both machines have their own copy of these same files. In other respects e.g. opening my huge Outlook files, the new machine is faster. The Windows Search Service has started. And I set indexing on the image folder about 3 days ago. Any ideas why I suffer from this poor index / search experience? Other than adding / removing folders, is there anything I can do to tweak indexing?

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• jquery array: find elements that appear twice in the array

  - by tsiger

  For a markup like this: <div id="set1"> <div id="100">a div</div> <div id="101">another div</div> <div id="102">another div 2</div> <div id="120">same div</div> </div> <div id="set2"> <div id="105">a different div> <div id="101">another div</div> <div id="110">more divs</div> <div id="120">same div</div> </div> As you can see both #set1 and #set2 contain 2 divs with the same id (101, 120). Is it possible somehow with jQuery to find the common elements and add a class to the divs in #set1 that have the same id with divs in #set2? In other words after the script run the above code would look like this: <div id="set1"> <div id="100">a div</div> <div id="101" class="added">another div</div> <div id="102">another div 2</div> <div id="120" class="added">same div</div> </div> <div id="set2"> <div id="105">a different div> <div id="101">another div</div> <div id="110">more divs</div> <div id="120">same div</div> </div>

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• Find keyword values from PDF [closed]

  - by JukkaA

  I have a lot of PDF reports I'd need to index. They're mostly "text-based PDFs", not images. I know they all have account number in certain format, 123456AAAAA and some other keyword info like addresses, customer names etc. needed in indexing these files. Basically if the file is ab.pdf, I need to create ab.txt that contains: ACC=123456AAAA Customer=John Doe Date=20120808 What would be the best software/solution to generate indexing information for these? I know there's pdftotext, but piping it to different grep/awk commands is a hack... It would be nice to specify an area in PDF to search for the account number, and specify the format it is in.

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