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• resizing an array with C

  - by Gary

  So I need to have an array of structs in a game I'm making - but I don't want to limit the array to a fixed size. I'm told there is a way to use realloc to make the array bigger when it needs to, but can't find any working examples of this. Could someone please show me how to do this? Thanks!

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• php compare array keys, not values

  - by user271619

  I am successfully using the array_key_exists(), as described by php.net Example: <?php $search_array = array('first' => 1, 'second' => 4); if (array_key_exists('first', $search_array)) { echo "The 'first' element is in the array"; } ?> But, take out the values, and it doesn't work. <?php $search_array = array('first', 'second'); if (array_key_exists('first', $search_array)) { echo "The 'first' element is in the array"; } ?> Not sure how to only compare 2 arrays by their keys only.

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• [PHP] Condition for array with string as keys

  - by Kel

  My PL/SQL procedure returns a cursor. It always returns data. I fetch (oci_fetch_assoc) it and save it in an array. If results were found the keys of the array will be strings. If the cursor didn't find data, it will return value 0, thus the key of the array will be numeric. while($data = oci_fetch_assoc($cursor)){ if(!isset($data[0])){ ... } ... ... } What's the best way to check that the array is not just 0, but contains data? Thanks

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• Capture String from Array, C#

  - by Dan Snyder

  I'm trying to figure out how to get a string from an array starting at some given position. Say we have an array that's arbitrarily long and my string starts at location 1000. If I wanted to get a string from a file I would simply use something like getc or scanf or something. How do I carry out these same functions on an array instead of a file? *oh, keep in mind that the array is of type int and is full of numerical representations of ASCII characters.

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• Returns an associative array comprising a function's argument list in php

  - by diEcho

  Hello All, in php func_get_args — Returns an array comprising a function's argument list it returns numeric index array is there any function/way in php by which we get associative array i.e. key=value pair i m explaining with example: test.php <?php function foo() { include './fga.inc'; } $x=20; $y=30; foo($x, $y); ?> fga.inc <?php $args = func_get_args(); echo "<pre>"; print_r($args); echo "</pre>"; ?> which should returns array ( 'x'=> 20, 'y' => 30, )

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• programmatically creating property list from json to include an array

  - by Michael Robinson

  [{"memberid":"18", "useridFK":"30", "loginName":"Johnson", "name":"Frank", "age":"23", "place":"School", },] Someone else posted a similar question but without the fact that it was coming from a JSON deserialization. Quinn had some suggestions but it was confused about where to place/replace the following code (if it's correct): NSDictionary *item1 = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@" member",[NSNumber numberWithInt:3],nil] forKeys:[NSArray arrayWithObjects:@"Title",@"View",nil]]; into this: NSData *jsonData = [jsonreturn dataUsingEncoding:NSUTF32BigEndianStringEncoding]; NSError *error = nil; NSDictionary * dict = [[CJSONDeserializer deserializer] deserializeAsDictionary:jsonData error:&error]; if (dict) { rowsArray = [dict objectForKey:@"member"]; [rowsArray retain]; } My Array.plist needs to look like the following: Root: Dictionary V Rows: Array V Item 0: Dictionary Title: String 18 V Children Array V Item 0 Dictionary Title String 30 etc. Thanks in advance. Every tutorial on JSON only shows a simple array being returned, never a 2-D..It's driving me crazy trying to figure this out.

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• Pass 2d array to function in C?

  - by Evelyn

  I know it's simple, but I can't seem to make this work. My function is like so: int GefMain(int array[][5]) { //do stuff return 1; } In my main: int GefMain(int array[][5]); int main(void) { int array[1800][5]; GefMain(array); return 0; } I referred to this helpful resource, but I am still getting the error "warning: passing argument 1 of GefMain from incompatible pointer type." What am I doing wrong?

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• Sorting 2D array of chars C++

  - by user69514

  I have a 2d array of chars where in each row I store a name... such as this: J O H N P E T E R S T E P H E N A R N O L D J A C K How should I go about sorting the array so that I end up with A R N O L D J A C K J O H N P E T E R S T E P H E N These is a 2d array of chars..... no strings or char points.....

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• Javascript array of dates - not iterating properly (jquery ui datepicker)

  - by PaulB

  Hi I have some code which builds an array of date ranges. I then call a function, passing it a date, and compare that date with dates in the array. I'm doing it this way because the dates are stored in a cms, and I'm manipulating the JqueryUI datepicker. Unfortunately my code only checks the first date range in the array - and I can't figure out why! I think it's probably something simple (/stupid!) - if anyone can shed some light on it I'd be extremely grateful! The code is below - the june-september range works fine, the december to jan is totally ignored... <script type="text/javascript" language="javascript"> var ps1 = new Date(2010, 06-1, 18); var pe1 = new Date(2010, 09-1, 03); var ps2 = new Date(2010, 12-1, 20); var pe2 = new Date(2011, 01-1, 02); var peakStart = new Array(ps1,ps2); var peakEnd = new Array(pe1,pe2); function checkDay(date) { var day = date.getDay(); for (var i=0; i<peakStart.length; i++) { if ((date > peakStart[i]) && (date < peakEnd[i])) { return [(day == 5), '']; } else { return [(day == 1 || day == 5), '']; } } } </script>

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• Fast serarch of 2 dimensional array

  - by Tim

  I need a method of quickly searching a large 2 dimensional array. I extract the array from Excel, so 1 dimension represents the rows and the second the columns. I wish to obtain a list of the rows where the columns match certain criteria. I need to know the row number (or index of the array). For example, if I extract a range from excel. I may need to find all rows where column A =”dog” and column B = 7 and column J “a”. I only know which columns and which value to find at run time, so I can’t hard code the column index. I could use a simple loop, but is this efficient ? I need to run it several thousand times, searching for different criteria each time. For r As Integer = 0 To UBound(myArray, 0) - 1 match = True For c = 0 To UBound(myArray, 1) - 1 If not doesValueMeetCriteria(myarray(r,c) then match = False Exit For End If Next If match Then addRowToMatchedRows(r) Next The doesValueMeetCriteria function is a simple function that checks the value of the array element against the query requirement. e.g. Column A = dog etc. Is it more effiecent to create a datatable from the array and use the .select method ? Can I use Linq in some way ? Perhaps some form of dictionary or hashtable ? Or is the simple loop the most effiecent ? Your suggestions are most welcome.

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• Read from a file into an array and stop if a ":" is found in ruby

  - by Minky

  Hi! How can I in Ruby read a string from a file into an array and only read and save in the array until I get a certain marker such as ":" and stop reading? Any help would be much appreciated =) For example: 10.199.198.10:111 test/testing/testing (EST-08532522) 10.199.198.12:111 test/testing/testing (EST-08532522) 10.199.198.13:111 test/testing/testing (EST-08532522) Should only read the following and be contained in the array: 10.199.198.10 10.199.198.12 10.199.198.13

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• Adding rows to an array in PHP

  - by ChuckO

  I have loaded an associative array of records from a MySQL database table. The array consists of 1 to 7 rows representing one week of entries, which might not have been entered for each day. How can I insert blank rows into the array for the missing days so that I can easily display the data in a table? I don't need to update the database with the blanks.

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• I want to use contents of String or Array in an IF ELSE statement for iphone

  - by Michael Robinson

  I want to check to see if an array is empty to activate a shipping method. Here is the code for returning the array. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *fullFileName = [NSString stringWithFormat:@"%@/arraySaveFile", documentsDirectory]; NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:fullFileName]; I want to write something like: if NSString *fullFileName ="" ; [nnNEP EnableShipping]; else [nnNEP DisableShipping]; OR if array contents ="" ; [nnNEP EnableShipping]; else [nnNEP DisableShipping]; I just can't find the right or description on how to do this properly. Thanks,

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• Iterate with binary structure over numpy array to get cell sums

  - by Curlew

  In the package scipy there is the function to define a binary structure (such as a taxicab (2,1) or a chessboard (2,2)). import numpy from scipy import ndimage a = numpy.zeros((6,6), dtype=numpy.int) a[1:5, 1:5] = 1;a[3,3] = 0 ; a[2,2] = 2 s = ndimage.generate_binary_structure(2,2) # Binary structure #.... Calculate Sum of result_array = numpy.zeros_like(a) What i want is to iterate over all cells of this array with the given structure s. Then i want to append a function to the current cell value indexed in a empty array (example function sum), which uses the values of all cells in the binary structure. For example: array([[0, 0, 0, 0, 0, 0], [0, 1, 1, 1, 1, 0], [0, 1, 2, 1, 1, 0], [0, 1, 1, 0, 1, 0], [0, 1, 1, 1, 1, 0], [0, 0, 0, 0, 0, 0]]) # The array a. The value in cell 1,2 is currently one. Given the structure s and an example function such as sum the value in the resulting array (result_array) becomes 7 (or 6 if the current cell value is excluded). Someone got an idea?

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• Searching a 2D array for a range of values in java

  - by Paige O

  I have a 2^n size int array and I want to check if an element exists that is greater than 0. If the element exists, I want to divide the array by 4 and check if the coordinates of the found element are in the 1st, 2nd, 3rd or 4th quadrant of the array. For example, logically if the element exists in the first quadrant it would look something like this: If array[][] 0 && the row of that coordinate is in the range 0-(grid.length/2-1) && the column of that coordinate is in the range 0-(grid.length/2-1) then do something. I'm really not sure how to check the row and column index of the found element and store those coordinates to use in my if statement. Help!

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• PHP in_array() can't even match a single character. Strict is set to true.

  - by solefald

  I've seen a million of these threads here already, and read through every single one already. Including some serious time Googling. Nothing complicated. All I have to do is check if a single character in a loop matches my alphabet array. print_r($alphabet); // all 26 letters Array ( [0] => a [1] => b [2] => c ... [23] => x [24] => y [25] => z ) print_r($emptyLetters); // dynamic array. Array ( [0] => b [1] => s ) foreach($alphabet as $letter): { echo $letter . '<br />' // Correctly prints out every letter from $alphabet. if(in_array($letter, $emptyLetters, true)): // $strict is set // do something endif; } What the hell is going on??? I do not understand what i am doing wrong.... I tried every combination and option possible, but for some reason even array_search() is bit working...

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• How to declare array of 2D array pointers and access them?

  - by vikramtheone

  Hi Guys, How can I declare an 2D array of 2D Pointers? And later access the individual array elements of the 2D arrays. Is my approach correct? main() { int i, j; int **array[10][10]; int **ptr = NULL; for(i=0;i<10;i++) { for(j=0j<10;j++) { alloc_2D(&ptr, 10, 10); array[i][j] = ptr; } } //After I do this, how can I access the individual 2D array //and then the individual elements of the 2D arrays? } void alloc_2D(float ***memory, unsigned int rows, unsigned int cols) { float **ptr; *memory = NULL; ptr = malloc(rows * sizeof(float*)); if(ptr == NULL) { status = ERROR; printf("\nERROR: Memory allocation failed!"); } else { int i; for(i = 0; i< rows; i++) { ptr[i] = malloc(cols * sizeof(float)); if(ptr[i]==NULL) { status = ERROR; printf("\nERROR: Memory allocation failed!"); } } } *memory = ptr; }

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• Multidimensional Array Initialization: Any benefit from Threading?

  - by Alan

  say I have the following code: char[5][5] array; for(int i =0; i < 5; ++i) { for(int j = 0; j < 5; ++i) { array[i][j] = 'X'; } } Would there be a benefit for initializing each row in this array in a separate thread? Imagine instead of a 5 by 5 array, we have a 10 by 10? n x n? Also, this is done once, during application startup.

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• VBA-Excel return multidimensional array from a function

  - by alesdario

  I'm trying to write a function which returns a multidimensional array. The problem is that the size of the array isn't defined. My array is initialized in the function below my_list() Dim my_list() As String Public Sub Load_My_List() Dim last_column As Integer last_column = some_helper.Get_Last_Column(somw_worksheet) 'my array is resized in this point ReDim my_list(1 To last_column - 1, 1) Dim i As Integer i = 1 For index= 2 To ultima_colonna my_list(i, 0) = some_worksheet.Cells(2, index).value my_list(i, 1) = index i = i + 1 Next index End Sub So, how can i write a function which returns my_list ? Something like the function below generate a mismacthing type error Public function Get_My_List as String() Get_My_List = my_list End Function and how can i call this function properly? I think that something like Dim test() as String test = Get_My_List will doesn't work

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• Visit neighbor of a position in a 2d-array

  - by Martin

  I have the following two dimensional array: static int[,] arr = new int[5, 5] { { 00, 00, 00, 01, 00 }, { 00, 00, 01, 01, 00 }, { 00, 00, 01, 01, 00 }, { 00, 00, 01, 01, 00 }, { 00, 00, 00, 01, 00 }, }; I have to a implement a method called Hit(int x, int y). When we hit a 0 in the array (i.e. Hit(0, 0), Hit(1, 1), but not Hit(3, 0)) I would like all the adjacent zeros to the zero we hit to be incremented by 10. So if I call Hit(1, 1), the array should become the following. static int[,] arr = new int[5, 5] { { 10, 10, 10, 01, 00 }, { 10, 10, 01, 01, 00 }, { 10, 10, 01, 01, 00 }, { 10, 10, 01, 01, 00 }, { 10, 10, 10, 01, 00 }, }; Any idea how I could implement that? It sounds to me like a Depth First Search/Recursive sort-of algorithm should do the job, but I haven't been able to implement it for an 2d array. Thanks for the help!

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• Using Dynamic Proxies to centralize JPA code

  - by Daziplqa

  Hi All, Actually, This is not a question but really I need your opinions in a matter... I put his post here because I know you always active, so please don't consider this a bad question and share me your opinions. I've used Java dynamic proxies to Centralize The code of JPA that I used in a standalone mode, and Here's the dynamic proxy code: package com.forat.service; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; import java.util.logging.Level; import java.util.logging.Logger; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import com.forat.service.exceptions.DAOException; /** * Example of usage : * <pre> * OnlineFromService onfromService = * (OnlineFromService) DAOProxy.newInstance(new OnlineFormServiceImpl()); * try { * Student s = new Student(); * s.setName("Mohammed"); * s.setNationalNumber("123456"); * onfromService.addStudent(s); * }catch (Exception ex) { * System.out.println(ex.getMessage()); * } *</pre> * @author mohammed hewedy * */ public class DAOProxy implements InvocationHandler{ private Object object; private Logger logger = Logger.getLogger(this.getClass().getSimpleName()); private DAOProxy(Object object) { this.object = object; } public static Object newInstance(Object object) { return Proxy.newProxyInstance(object.getClass().getClassLoader(), object.getClass().getInterfaces(), new DAOProxy(object)); } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { EntityManagerFactory emf = null; EntityManager em = null; EntityTransaction et = null; Object result = null; try { emf = Persistence.createEntityManagerFactory(Constants.UNIT_NAME); em = emf.createEntityManager();; Method entityManagerSetter = object.getClass(). getDeclaredMethod(Constants.ENTITY_MANAGER_SETTER_METHOD, EntityManager.class); entityManagerSetter.invoke(object, em); et = em.getTransaction(); et.begin(); result = method.invoke(object, args); et.commit(); return result; }catch (Exception ex) { et.rollback(); Throwable cause = ex.getCause(); logger.log(Level.SEVERE, cause.getMessage()); if (cause instanceof DAOException) throw new DAOException(cause.getMessage(), cause); else throw new RuntimeException(cause.getMessage(), cause); }finally { em.close(); emf.close(); } } } And here's the link that contains more info (http://m-hewedy.blogspot.com/2010/04/using-dynamic-proxies-to-centralize-jpa.html) (plz don't consider this as adds, as I can copy and past the entire topic here if you want that) So, Please give me your opinions. Thanks.

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• Convert an ArrayList to an object array

  - by marionmaiden

  Hello, Is there a command in java for conversion of an ArrayList into a object array. I know how to do this copying each object from the arrayList into the object array, but I was wondering if would it be done automatically. I want something like this: ArrayList<TypeA> a; // Let's imagine "a" was filled with TypeA objects TypeA[] array = MagicalCommand(a);

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• duplicate one element from php array

  - by robertdd

  how i can duplicate one element from array: for example, i have this array: Array ( [LRDEPN] => 0008.jpg [OABCFT] => 0030.jpg [SIFCFJ] => 0011.jpg [KEMOMD] => 0022.jpg [DHORLN] => 0026.jpg [AHFUFB] => 0029.jpg ) if i want to duplicate this: 0011.jpg , how to proceed? i want to get this: Array ( [LRDEPN] => 0008.jpg [OABCFT] => 0030.jpg [SIFCFJ] => 0011.jpg [NEWKEY] => 0011.jpg [KEMOMD] => 0022.jpg [DHORLN] => 0026.jpg [AHFUFB] => 0029.jpg )

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• get path of Array (PHP)

  - by Kawah Grafis

  i have an array input like this .. Array ( [0] => Array ( [0] => 42 ) [**42**] => Array ( [0] => 12 [1] => 14 ) [**14**] => Array ( [0] => 317 ) [317] => Array ( [0] => 319 ) [**12**] => Array ( [0] => 306 [1] => 307 ) [307] => Array ( [0] => 311 ) [306] => Array ( [0] => 309 ) ) and i want to get result array like bellow : $paths[]=array(42,12,306,309); $paths[]=array(42,12,307,311); $paths[]=array(42,14,317,319); see array input root in array input = 42 (index of array 0) 42 have child = 12, 14 12 have child = 306, 307 14 have child = 317 306 have child = 309 307 have child = 311 317 have child = 319 like this.. and output array insert into $paths $paths[0]=array(42,12,306,309); $paths[1]=array(42,12,307,311); $paths[2]=array(42,14,317,319);

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• Array's index and argc signedness

  - by tusbar

  Hello, The C standard (5.1.2.2.1 Program startup) says: The function called at program startup is named main. [...] It shall be de?ned with a return type of int and with no parameters: int main(void) { /* ... */ } or with two parameters [...] : int main(int argc, char *argv[]) { /* ... */ } And later says: The value of argc shall be nonnegative. Why shouldn't argc be defined as an unsigned int, argc supposedly meaning 'argument count'? Should argc be used as an index for argv? So I started wondering if the C standard says something about the type of array's index. Is it signed? 6.5.2.1 Array subscripting: One of the expressions shall have type ‘‘pointer to object type’’, the other expression shall have integer type, and the result has type ‘‘type’’. It doesn't say anything about its signedness (or I didn't find it). It is pretty common to see codes using negatives array indexes (array[-1]) but isn't it undefined behavior? Should array's indexes be unsigned?

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