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  • How to fill byte array with junk?

    - by flyout
    I am using this: byte[] buffer = new byte[10240]; As I understand this initialize the buffer array of 10kb filled with 0s. Whats the fastest way to fill this array (or initialize it) with junk data every time? I need to use that array like 5000 times and fill it every time with different junk data, that's why I am looking for a fast method to do it. The array size will also have to change every time.

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  • Returning unique values of a multi-dimensional array with CodeIgniter PHP

    - by Michael Bradley
    Hi - I'm developing a property rentals website. The search results page will contain a list of property results. It is my intention to redefine the results, say by town, country, property type etc. So let's say for example the user searches 'France'. All of the relative properties will be returned and displayed in a list. However, I also need to reuse this array, to display only unique town names from the search results array. e.g. Montpellier, Lyon, Rennes, Nice etc. The idea is when use user click on 'Nice', only the 'Nice' properties would return. I would also like to display how many properties are in that town. The closest example as to what I want to achieve. http://www.miaandmaggie.com/dog-collars-leashes.html Any ideas how I can use my search array to display the unique towns of the search? Many thanks! M

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  • How do I code a loop for my echo statement?

    - by ggg
    I get only one printed result in the foreach echo loop at the bottom of the page. <?php defined('_JEXEC') or die('Restricted access'); $db =& JFactory::getDBO(); $query0 = "SELECT * FROM `jos_ginfo` WHERE . . . LIMIT 30"; //echo $query0; $db->setQuery($query0); $ginfo = $db->loadObjectList(); //echo //$ginfo[0]; foreach($ginfo as $ginfo[$i]): {$i=0; $i++;} endforeach; echo $db->getErrorMsg(); if(empty($ginfo)){ echo "<center>No game found, try a different entry.</center>"; }else{ $pgndata = array ( $ginfo[$i]->Id); $i=0; foreach($pgndata as $ginfo[$i]->Id): //I am only getting one printed result! { echo "<a href='/index.php?option=com_publishpgn&tactical-game=".$ginfo[$i]->Id."&Itemid=78.html'>\n"; echo "".$ginfo[$i]->White." v. ".$ginfo[$i]->Black." (".$ginfo[$i]->Result.") ".$ginfo[$i]->EventDate." ECO:".$ginfo[$i]->ECO."</a><br>\n"; $i++; } endforeach; //echo "</div>"; } ?>

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  • Accumulate 2D Array by Index

    - by Tegan Snyder
    I have an array that looks like this: Array ( [0] => Array ( [amount] => 60.00 [store_id] => 1 ) [1] => Array ( [amount] => 40.00 [store_id] => 1 ) [2] => Array ( [amount] => 10.00 [store_id] => 2 ) ) What would be a good method to reduce the array to a similar array that totals the 'amount' related to a store_id. For Instance I'd like to get this: Array ( [0] => Array ( [amount] => 100.00 [store_id] => 1 ) [2] => Array ( [amount] => 10.00 [store_id] => 2 ) )

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  • NSString stringWithFormat: with C array?

    - by Chris Long
    Hi, I'm writing a program that calculates the Jacobi algorithm. It's written in Objective-C since it runs on a Mac, but the majority is written in standard C. I'm using a two-dimensional C array and an NSArray containing 5 NSTextField labels. The following code yields an EXC_BAD_ACCESS error: for ( int i = 0; i < 5; i++ ) { NSString *resultString = [NSString stringWithFormat:@"%g", matrix[i][i] ]; [[resultLabels objectAtIndex:i] setStringValue:resultString]; // error line } Any help?

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  • How to merge data using php.

    - by bob
    Currently my MySQL data stored like below product | total ------------------------------------------ puma,adidas | 100.00,125.00 puma | 80.00 reebok,adidas,puma | 70.00,100.00,125.00 adidas,umbro | 125.00,56.00 How to combine, explode, merge and total it like this in php? puma 485.00 adidas 350.00 reebook 70.00 umbro 56.00

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  • Import and Export for CSV are both broken in Mathematica

    - by dreeves
    Consider the following 2 by 2 array: x = {{"a b c", "1,2,3"}, {"i \"comma-heart\" you", "i \",heart\" u, too"}} If we Export that to CSV and then Import it again we don't get the same thing back: Import[Export["tmp.csv", d]] Looking at tmp.csv it's clear that the Export didn't work, since the quotes are not escaped properly. According to the RFC which I presume is summarized correctly on Wikipedia's entry on CSV, the right way to export the above array is as follows: a b c, "1,2,3" "i ""heart"" you", "i "",heart"" u, too" Importing the above does not yield the original array either. So Import is broken as well. I've reported these bugs to [email protected] but I'm wondering if others have workarounds in the meantime. One workaround is to just use TSV instead of CSV. I tested the above with TSV and it seems to work (even with tabs embedded in the entries of the array).

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  • printing out prime numbers from array

    - by landscape
    I'd like to print out all prime numbers from an array with method. I can do it with one int but don't know how to return certain numbers from array. Thanks for help! public static boolean isPrime(int [] tab) { boolean prime = true; for (int i = 3; i <= Math.sqrt(tab[i]); i += 2) if (tab[i] % i == 0) { prime = false; break; } for(int i=0; i<tab.length; i++) if (( tab[i]%2 !=0 && prime && tab[i] > 2) || tab[i] == 2) { return true; } else { return false; } //return prime; } thanks both of you. Seems like its solved: public static void isPrime(int[] tab) { for (int i = 0; i < tab.length; i++) { if (isPrimeNum(tab[i])) { System.out.println(tab[i]); } } } public static boolean isPrimeNum(int n) { boolean prime = true; for (long i = 3; i <= Math.sqrt(n); i += 2) { if (n % i == 0) { prime = false; break; } } if ((n % 2 != 0 && prime && n > 2) || n == 2) { return true; } else { return false; } }

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  • How do I know an array of structures was allocated in the Large Object Heap (LOH) in .NET?

    - by AMissico
    After some experimenation using CLR Profiler, I found that: Node[,] n = new Node[100,23]; //'84,028 bytes, is not placed in LOH Node[,] n = new Node[100,24]; //'86,428 bytes, is public struct Node { public int Value; public Point Point; public Color Color; public bool Handled; public Object Tag; } During run-time, how do I know an array of structures (or any array) was allocated in the Large Object Heap (LOH)?

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  • Why doesn't this Perl array sort work?

    - by Luke
    Why won't the array sort? CODE my @data = ('PJ RER Apts to Share|PROVIDENCE', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Condo|WEST WARWICK', 'PJ RER Condo|WARWICK'); foreach my $line (@data) { $count = @data; chomp($line); @fields = split(/\|/,$line); if ($fields[0] eq "PJ RER Apts to Share"){ @city = "\u\L$fields[1]"; @city_sort = sort (@city); print "@city_sort","\n"; } } print "$count","\n"; OUTPUT Providence Johnston Johnston Johnston 6

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  • passing an array of structures (containing two mpz_t numbers) to a function

    - by jerome
    Hello, I'm working on some project where I use the type mpz_t from the GMP C library. I have some problems passing an array of structures (containing mpz_ts) adress to a function : I wille try to explain my problem with some code. So here is the structure : struct mpz_t2{ mpz_t a; mpz_t b; }; typedef struct mpz_t2 *mpz_t2; void petit_test(mpz_t2 *test[]) { printf("entering petit test function\n"); for (int i=0; i < 4; i++) { gmp_printf("test[%d]->a = %Zd and test[%d]->b = %Zd\n", test[i]->a, test[i]->b); } } /* IN MAIN FUNCTION */ mpz_t2 *test = malloc(4 * sizeof(mpz_t2 *)); for (int i=0; i < 4; i++) { mpz_t2_init(&test[i]); // if I pass test[i] : compiler error mpz_set_ui(test[i].a, i); //if test[i]->a compiler error mpz_set_ui(test[i].b, i*10); //same problem gmp_printf("%Zd\n", test[i].b); //prints correct result } petit_test(test); The programm prints the expected result (in main) but after entering the petit_test function produces a segmentation fault error. I would need to edit the mpz_t2 structure array in petit_test. I tried some other ways allocating and passing the array to the function but I didn't manage to get this right. If someone has a solution to this problem, I would be very thankfull! Regards, jérôme.

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  • How to scan an array for certain information

    - by Andrew Martin
    I've been doing an MSc Software Development conversion course, the main language of which is Java, since the end of September. We have our first assessed practical coming and I was hoping for some guidance. We have to create an array that will store 100 integers (all of which are between 1 and 10), which are generated by a random number generator, and then print out ten numbers of this array per line. For the second part, we need to scan these integers, count up how often each number appears and store the results in a second array. I've done the first bit okay, but I'm confused about how to do the second. I have been looking through the scanner class to see if it has any methods which I could use, but I don't see any. Could anyone point me in the right direction - not the answer, but perhaps which library it comes from? Code so far: import java.util.Random; public class Practical4_Assessed { public static void main(String[] args) { Random numberGenerator = new Random (); int[] arrayOfGenerator = new int[100]; for (int countOfGenerator = 0; countOfGenerator < 100; countOfGenerator++) arrayOfGenerator[countOfGenerator] = numberGenerator.nextInt(10); int countOfNumbersOnLine = 0; for (int countOfOutput = 0; countOfOutput < 100; countOfOutput++) { if (countOfNumbersOnLine == 10) { System.out.println(""); countOfNumbersOnLine = 0; countOfOutput--; } else { System.out.print(arrayOfGenerator[countOfOutput] + " "); countOfNumbersOnLine++; } } } } Thanks, Andrew

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  • Double linking array in Python

    - by cdecker
    Since I'm pretty new this question'll certainly sound stupid but I have no idea about how to approach this. I'm trying take a list of nodes and for each of the nodes I want to create an array of predecessors and successors in the ordered array of all nodes. Currently my code looks like this: nodes = self.peers.keys() nodes.sort() peers = {} numPeers = len(nodes) for i in nodes: peers[i] = [self.coordinator] for i in range(0,len(nodes)): peers[nodes[i%numPeers]].append(nodes[(i+1)%numPeers]) peers[nodes[(i+1)%numPeers]].append(nodes[i%numPeers]) # peers[nodes[i%numPeers]].append(nodes[(i+4)%numPeers]) # peers[nodes[(i+4)%numPeers]].append(nodes[i%numPeers]) The last two lines should later be used to create a skip graph, but that's not really important. The problem is that it doesn't really work reliably, sometimes a predecessor or a successor is skipped, and instead the next one is used, and so forth. Is this correct at all or is there a better way to do this? Basically I need to get the array indices with certain offsets from each other. Any ideas?

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  • How to pull data from a MySQL column and put it into a single array

    - by Rob
    Basically, this is what I currently use in an included file: $sites[0]['url'] = "http://example0.com"; $sites[1]['url'] = "http://example1.com"; $sites[2]['url'] = "http://example2.com"; $sites[3]['url'] = "http://example3.com"; $sites[4]['url'] = "http://example4.com"; $sites[5]['url'] = "http://example5.com"; And so I output it like so: foreach($sites as $s) But I want to make it easier to manage via a MySQL database. So my question is, how can I make it automatically add additional "$sites[x]['url'] = "http://examplex.com";" and output it appropriately from my MySQL table?

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  • Can't access dojo object property using string variable

    - by Kareem
    I am retrieving a json associative array using a dojo xhrGet request. The data comes back just fine, however I need the app to be able to display the keys and their properties (or values) without knowing the keys beforehand. So, I do the following: function getData() { dojo.xhrGet( { url: "ytd_process.php", handleAs: "json", load: function(response) { for (var key in response) { dojo.byId("boxes").innerHTML+="<div id=\"box\">"+key+":"+response.key+"</div>"; } console.dir(response); // Dump it to the console } }); }; The keys are retrieved and displayed on the page, but the response.key returns undefined. I know the syntax is correct because if I replace .key with an actual key value it will display correctly. It appears it doesn't like a string as the key. Any help or advice would be greatly appreciated. Thank you.

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  • Accessing items separated by -componentsSeparatedByString

    - by Graeme
    Hi, I have an array gathered by componentsSeparatedByString: that looks like the following when I use po in the GDB after the array has gone through componentsSeparatedByString: "\n\t\t <b>Suburb, </b> BAIRNSDALE", "\n\t\t <b>Address, </b> 15K NW BAIRNSDALE", "\n\t\t <b>Reference, </b> MELWOOD/SCHOOL ROAD", "\n\t\t <b>Last Changed, </b> 09/04/10 05, 29, 00 PM", "\n\t\t <b>Type, </b> HOME", "\n\t\t <b>Status, </b> BUILT", "\n\t\t <b>Property Size, </b> 2.00 HA.", "\n\t\t <b>Residents, </b> 2", "\n\t\t <b>First Added Date/Time, </b> 09/04/10 03, 15, 00 PM", "\n\t\t\t" Only problem is, I now can't figure out where to go from here. I need to be able to access each of these items (i.e. type, status, property size) separately rather than just calling the entire array (i.e. currentProperty.status). How do I do this? Also what's with all the n\t\t\t things - how do I get rid of them? Thanks.

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  • How to @synthesize a C-Style array of pointers?

    - by Peter Hajas
    I have a property defined in a class like so: @interface myClass UIImageView *drawImage[4]; ... @property (nonatomic, retain) UIImageView **drawImage; ... @synthesize drawImage; // This fails to compile I have found similar questions on StackOverflow and elsewhere, but none that really address this issue. What is the most Objective-C kosher way to do this?

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  • Adding Rows to Gridview without using databind

    - by powertex
    Hello, I have a gridview inside of a listview predefined in the xaml: .... <ListView x:Name="listPriority" IsSynchronizedWithCurrentItem="True" Margin="0,30,0,4" BorderThickness="0,0,0,0"> <ListView.View> <GridView> <GridViewColumn x:Name="grvPriorityColumn" Width="140" Header="Priority" /> <GridViewColumn x:Name="grvMessage" Width="250" Header="Message" /> </GridView> </ListView.View> .... I have an array containing data that needs to go into the "grvPriorityColumn" and "grvMessage". How do add this data to the gridview without using databinding?

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  • Ruby: How to loop through an object that may or may not be an array?

    - by Shpigford
    I have an each method that is run on some user-submitted data. Sometimes it will be an array, other times it won't be. Example submission: <numbers> <number>12345</number> </numbers> Another example: <numbers> <number>12345</number> <number>09876</number> </numbers> I have been trying to do an each do on that, but when there is only one number I get a TypeError (Symbol as array index) error.

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  • ArrayList in Java, adding code to methods

    - by yaz
    Why am I getting a compile time error for the two method headers at the end of my code in my class ArrayListTest? ArrayListTest: http://pastebin.com/dUHn9vPr Student: http://pastebin.com/3Vz1Aytr I have a compiler error at the two lines: delete(CS242, s3) replace(CS242, s, s4); When I try to run the code it states: Exception in thread "main" java.lang.Error: Unresolved compilation problems: The method replace(ArrayList<Student>, Student, Student)in the type ArrayListTest is not applicable for the arguments (List<Student>, Student, Student) The method delete(ArrayList<Student>, Student) in the type ArrayListTest is not applicable for the arguments (List<Student>, Student) at ArrayListTest.main(ArrayListTest.java:54) I fixed the compile time errors since I use Eclipse and Eclipse gives options of code you can use to fix the compile time error. I chose to "Change method to 'replace(ArrayList, Student, Student)' to 'replace(List, Student, Student)' Although it fixed that compile time error, I don't understand why I was getting a compile time error to begin with and why that effectively fixed the error I don't really know what missing code I need to write to correct these two methods below: public static void replace(List<Student> cS242, Student oldItem, Student newItem) { public static void delete(List<Student> cS242, Student target){

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  • calculating min and max of 2-D array in c

    - by m2010
    This program to calculate sum,min and max of array elements Max value is the problem, it is always not true. void main(void) { int degree[3][2]; int min_max[][]; int Max=min_max[0][0]; int Min=min_max[0][0]; int i,j; int sum=0; clrscr(); for(i=0;i<3;i++) { for(j=0;j<2;j++) { printf("\n enter degree of student no. %d in subject %d:",i+1,j+1); scanf("%d",&degree[i][j]); } } for(i=0;i<3;i++) { for(j=0;j<2;j++) { printf("\n Student no. %d degree in subject no. %d is %d",i+1,j+1,degree[i][j]); } } for(i=0;i<3;i++) { sum=0; for(j=0;j<2;j++) { sum+=degree[i][j]; } printf("\n sum of degrees of student no. %d is %d",i+1,sum); min_max[i][j]=sum; if(min_max[i][j] <Min) { Min=min_max[i][j]; } else if(min_max[i][j]>Max) { Max=min_max[i][j]; } } printf("\nThe minimum sum of degrees of student no. %d is %d",i,Min); printf("\nThe maximum sum of degrees of student no. %d is %d",i,Max); getch(); }

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  • How do I find, count, and display unique elements of an array using Perl?

    - by Luke
    I am a novice Perl programmer and would like some help. I have an array list that I am trying to split each element based on the pipe into two scalar elements. From there I would like to spike out only the lines that read ‘PJ RER Apts to Share’ as the first element. Then I want to print out the second element only once while counting each time the element appears. I wrote the piece of code below but can’t figure out where I am going wrong. It might be something small that I am just overlooking. Any help would be greatly appreciated. ## CODE ## my @data = ('PJ RER Apts to Share|PROVIDENCE', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Apts to Share|JOHNSTON', 'PJ RER Condo|WEST WARWICK', 'PJ RER Condo|WARWICK'); foreach my $line (@data) { $count = @data; chomp($line); @fields = split(/\|/,$line); if (($fields[0] =~ /PJ RER Apts to Share/g)){ @array2 = $fields[1]; my %seen; my @uniq = grep { ! $seen{$_}++ } @array2; my $count2 = scalar(@uniq); print "$array2[0] ($count2)","\n" } } print "$count","\n"; ## OUTPUT ## PROVIDENCE (1) JOHNSTON (1) JOHNSTON (1) JOHNSTON (1) 6

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