arrays

How to use boost::array with unknown size as object variable

I'd like to use boost::array as a class member, but I do not know the size at compile time. I thought of something like this, but it doesn't work: int main() { boost::array<int, 4> array = {{1,2,3,4}}; MyClass obj(array); } class MyClass { private: boost::array<int, std::size_t> array; public: template<s...

Find the length of only the first dimension in a multi-dimension array

Let's say I have the following: public void MakeMatrix(int matrixLength) { int[,] Matrix = new Matrix[matrixLength,matrixLength] PopulateMatrix(Matrix); PrintMatrix(Matrix); } In the PrintMatrix(int[,] Matrix) function, how to I find the length of only one dimension of the multi-dimension array? public void PrintMatrix(in...

PHP - Assigning values in a while loop and Accessing them individually outside the loop

Hi all, PLATFORM: PHP, mySQL WHAT I HAVE: I have a Database table. Within my application, I am able to fetch all the rows. When I am querying the database, I have set the records fetch limit dynamically. WHAT I AM TRYING TO DO: I am trying to pull out all the rows of data until the record fetch limit is reached, in a loop. I want...

jQuery - Need to access PHP array values received after a successful ajax POST operation

Hi all, PLATFORM: jQuery, PHP, mySQL WHAT I HAVE: I am using jQuery to process information from a form and send all the POST data to a php file that does several operations and returns an array of data along with other necessary data. One of the arrays is an array of an array. I need to access this array of array values in such a way...

Calculating Area of Irregular Polygon in C#

Hi peeps I've managed to write a 'for dummies' how to calculate the area of irregular polygon in C#, but I need it to be dynamic for any amount of verticies. Can someone please help? Class: public class Vertex { private int _vertexIdx; private double _coordX; private double _coordY; private double _coordZ; public...

variable-length arrays

Hi, I just wonder if there is some overhead of using variable-length arrays? Can the size of array could be passed via command line argument at run time? Why is it introduced, compared to automatic and dynamically allocating an array? Thanks! ...

C# and arrays of anonymous objects

what does such expression mean? obj.DataSource = new[] { new {Text = "Silverlight", Count = 10, Link="/Tags/Silverlight" }, new {Text = "IIS 7", Count = 11, Link="http://iis.net" }, new {Text = "IE 8", Count = 12, Link="/Tags/IE8" }, new {Text = "C#", Count = 13, Link="/Tags/C#" }, new {Text = "Azure", Count = 13, Link="?Tag=Azure" } };...

type of an array

Hi, when I need to pass an array to a function, it seems all the following declarations of the function will work void f(int arr[]) void f(int arr[4]) // is this one correct? for this: int a[]={1,2,3,4}; f(a); But when I assign an array to another array, it fails int a[]={1,2,3,4}; int b[4] = a; // error: array must be initiali...

"org.json.JSONArray implements Serializable": What's the best option to achieve this?

I am using Grails Webflow, what ever object I pass to a view, it must be Serialized. My domain models "implement Serializable", so they work. The problem is when I get a response from a WebService. It is of the org.json.JSONArray class. I just want to pass the whole Array over to the view yet it doesn't implement Serializable, so it fa...

How to Initialize Array with Custom Type

How do I initialize this array of custom types: PostType[] q = new PostType[qArray.Length]; //initialize array for( int x = 0; x < qArray.Length; x++) q[x] = new PostType(); Is there a better way to initialize this array? ...

Get adjacent elements in a two-dimensional array?

I have a two-dimensional array, say 0 0 0 0 0 0 2 3 4 0 0 9 1 5 0 0 8 7 6 0 0 0 0 0 0 And i need to get all the numbers adjacent to 1(2, 3, 4, 5, 6, 7, 8, 9) Is there a less ugly solution than: topLeft = array[x-1][y-1] top = array[x][y-1] topRight = array[x+1][y-1] # etc Thanks! ...

2D Rotation Array

I need help converting this code from this thread: http://stackoverflow.com/questions/646468/how-to-rotate-a-2d-array-of-integers to PHP arrays. int [,] newArray = new int[4,4]; for (int i=3;i>=0;--i) { for (int j=0;j<4;++j) { newArray[j,3-i] = array[i,j]; } } Also, will this code work if the blocks are off-center? ...

Literal string initializer for a character array

Hi, In the following rules for the case when array decays to pointer: An lvalue [see question 2.5] of type array-of-T which appears in an expression decays (with three exceptions) into a pointer to its first element; the type of the resultant pointer is pointer-to-T. (The exceptions are when the array is the operand of a sizeo...

Use current elements class as an array name?

Is it possible to use a string from an elements CSS class as an array name? I'm looking for a smarter way of storing default animations that may grow over time to include more options in the array. Example JavaScript (jQuery): - var a1 = ['red', 'pink']; var a2 = ['green', 'lime']; var a3 = ['blue', 'cyan']; $('ul li').click...

auto display filename in a directory and auto fill it as value

Hi Guys, I want something (final) like this : <?php //named as config.php $fn[0]["long"] = "file name"; $fn[0]["short"] = "file-name.txt"; $fn[1]["long"] = "file name 1"; $fn[1]["short"] = "file-name_1.txt"; ?> What that I want to?: 1. $fn[0], $fn[1], etc.., as auto increasing 2. "file-name.txt", "file-name_1.txt", etc.., as fi...

Simple ArrayList question

I have this class: public class User { public User(String nickname, String ipAddress) { nickname = nickname.toLowerCase(); System.out.println(nickname + " " + ipAddress); } } And another class that creates an array containing User objects. class UserMananger { static User user; static User user2; ...

sortedArrayUsing and NSComparison Result : I don't understand how these are actually going about sorting

We're looking at different methods to sort the objects/elements in an array, the thing that doesn't make sense to me is how the actual sorting is done. I guess the big point of confusion is how can the "sort" method be effective if it only compares one object against another? If there are values a, g, b, d, z, s, h in the array im not ...

finding size of int array

How to find size of an int array? eg: int list[]={1,5,7,8,1,1,4,5,7,7,7,8,10,20}; how to the size of list? I know for char array. We can use strlen(array) to find the size, or check with '\0' at the end of the array. But for int array, checking '\0' seems not working. Problem!!!!!!!!!! sizeof(array)/sizeof(array[0]) only work...

PHP array_merge_recursive doesn't work as I wish

So basically I have these two arrays I want to merge... array(1) { ["first"]=> array(1) { ["second"]=> array(0) { } } } array(1) { ["second"]=> array(1) { ["third"]=> array(0) { } } } And this is the result I'd like to achieve... array(1) { ...

Join array contents into an 'English list'

I like to join an array resulting in an 'English list'. For example ['one', 'two', 'three'] should result in 'one, two and three'. I wrote this code to achieve it (assuming that the array is not empty, which is not the case in my situation) if array.length == 1 result = array[0] else result = "#{array[0, array.length].join(', ')} a...