multidimensional-array

Java array of arry [matrix] of an integer partition with fixed term

Hello, for my study purpose I need to build an array of array filled with the partitions of an integer with fixed term. That is given an integer, suppose 10 and given the fixed number of terms, suppose 5 I need to populate an array like this 10 0 0 0 0 9 0 0 0 1 8 0 0 0 2 7 0 0 0 3 ............ 9 0 0 1 0 8 0 0 1 1 ............. 7 0 1 1...

PHP - Check that value doesn't appear twice in array

Hi, I have a array inside my PHP app that looks like this: Array ( [0] => Array ( [name] => Name1 [language] => 1 ) [1] => Array ( [name] => Name2 [language] => 1 ) ) How can I check that "language" with value 1 doesnt appear twice, as effective...

how to extract a column from mysql result set?

What would be the best way to extract a column out of mysql results set? My result set is like: [0] = ('id'=>1, 'name'=>a), [1] = ('id'=>2, 'name'=>b), [2] = ('id'=>3, 'name'=>c) How can I extract 'name' column as an array from this? I can do it using for loop. But wondering if there are any better reusable solution? ...

Dynamically Generate Multi-Dimensional Array in Ruby

Hi, I'm trying to build a multidimensional array dynamically. What I want is basically this (written out for simplicity): b = 0 test = [[]] test[b] << ["a", "b", "c"] b += 1 test[b] << ["d", "e", "f"] b += 1 test[b] << ["g", "h", "i"] This gives me the error: NoMethodError: undefined method `<<' for nil:NilClass. I can make it work ...

php if array key exists inside multidimentional array

how can i check if logo exists in this array called $attachements print_r is below: Array ( [logo] => /home/richar2/public_html/ioagh/images/stories/jreviews/20100510115659_1_img.gif ) when theres no logo, the array print_r's Array ( ) i tried: if (isset($attachments['logo']) ) {..} but the conditional code runs when ...

How to sort a multidimensional array by a certain key?

This should be really simple, but what is the way to go on this. I want to sort an multidimensional array by a key, like this: Array ( [0] => Array ( [iid] => 1 [invitee] => 174 [nid] => 324343 [showtime] => 2010-05-09 15:15:00 [location] => 13 [status] => 1 [created] => 2010-...

Accessing variable in Smarty Array

Hi, I'm trying to access a variable in a smarty array. The array is called product and contains loads of values. A print_r dump of the array is shown below Array ( [0] => Array ( [itemid] => 4 [productid] => 31 [productcode] => 1658303 [product] => ENERGIZER 628504 COMP RECH...

Math Question: Is it possible to calculate the row position as you loop through a cartesian product of two arrays?

Is it possible to calculate the row position in the cartesian product of two arrays? For example if you have one array of two rows and another of three rows it's easy to calculate the size of the cartesian product (Array1.Rows.Count * Array2.Rows.Count = 6), but you can't iterate through each array and just use the product of the respec...

PHP How do I properly check if an array is multi-dimensional - strange array behavior

If I have this array: $foo[0] = 'bar'; $foo[1] = 'bar bar'; echo $foo[0][1]; // result a // i.e the second letter of 'bar' I want to check that $foo[0][1] is not set i.e if I had: $foo[0][1] = 'bar'; it would evaluate to true, but in my original example of $foo[0] = 'bar' I would expect that: isset($foo[0][1]) would return fa...

How to pass a multidimensional array to a function in C and C++

#include<stdio.h> void print(int *arr[], int s1, int s2) { int i, j; for(i = 0; i<s1; i++) for(j = 0; j<s2; j++) printf("%d, ", *((arr+i)+j)); } int main() { int a[4][4] = {{0}}; print(a,4,4); } This works in C, but not in C++. error: cannot convert `int (*)[4]' to `int**' for argument `1' to `vo...

php multidimensional array problem

Hi to all, i am trying to setup a multidimensional array but my problem is that i can not get the right order from incoming data. Explain $x[1][11]=11; $x[1]=1; var_dump($x); In the above code i get only x[1]. To right would be $x[1]=1; $x[1][11]=11; var_dump($x); But in my case i can dot ensure that x[1] will come first, and ...

How to foreach through a 2 dimensional array?

If I've got a 2 dimensional array. string[,] table = { { "aa", "aaa" }, { "bb", "bbb" } }; And I'd like to foreach through it like this. foreach (string[] row in table) { Console.WriteLine(row[0] + " " + row[1]); } But, I get the error "Can't convert type string t...

What methods are used to visualize a 4-dimensional Array?

An Array ( a row of elements ): [ ][ ][ ][ ][ ][ ] A 2-D Array ( a table ): [ ][ ][ ][ ][ ][ ] [ ][ ][ ][ ][ ][ ] [ ][ ][ ][ ][ ][ ] [ ][ ][ ][ ][ ][ ] A 3-D Array: //Imagine the above table as a cube ( a table with depth ) How does one visualize a 4-D array? The closest I can come is multiple cubes, so for int[,,,] [5,10,2,7] ...

Generating All Permutations of Character Combinations when # of arrays and length of each array are unknown

Hi everyone, I'm not sure how to ask my question in a succinct way, so I'll start with examples and expand from there. I am working with VBA, but I think this problem is non language specific and would only require a bright mind that can provide a pseudo code framework. Thanks in advance for the help! Example: I have 3 Character Arrays ...

I want to scramble an array in PHP

I want PHP to randomly create a multi-dimensional array by picking a vast amount of items out of predefined lists for n times, but never with 2 times the same. Let me put that to human words in a real-life example: i want to write a list of vegetables and meat and i want php to make a menu for me, with every day something else then yest...

Is this 2D array initialization a bad idea?

I have something I need a 2D array for, but for better cache performance, I'd rather have it actually be a normal array. Here's the idea I had but I don't know if it's a terrible idea: const int XWIDTH = 10, YWIDTH = 10; int main(){ int * tempInts = new int[XWIDTH * YWIDTH]; int ** ints = new int*[XWIDTH]; for(int i=0; i<XWI...

Ladder-like word game in Java

I've found this question http://stackoverflow.com/questions/2844190/choosing-design-method-for-ladder-like-word-game and I would also like to do this kind of program. I've written some code but already have two issues. Here's what I already have : GRID : public class Grid { public Grid(){} public Grid( Element e ){} } ELE...

calculating min and max of 2-D array in c

This program to calculate sum,min and max of the sum 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++) ...

rearrange multidimensional array on basis of value of inner array

i have an array like this Array ( [0] => Array ( [cat_name] => Clothing [cat_id] => 1 [item_name] => shirt [item_id] => 1 [src] => 177 [sic] => 78 ) [1] => Array ( [cat_name] => Stationary [cat_id] => 3 ...

ruby sortby 3rd element in a multidimential array npot working properly

Hi, I'm using ruby to sort an array where each element in the array is another array. I have this: Data = Data.SortBy { |Info| info[3] } example data in this column: 3.1 2 5.65 -1 0.4 -9.43 -10.87 -2.3 It should sort this into: 5.65 3.1 2 0.4 -1 -2.3 -9.43 -10.87 But it comes out like this: 5.65 3.1 2 0.4 -1 -10.87 -2.3 -9.43...