JavaScript guide: Converting an array structured by tuples into a multidimensional array

Question

JavaScript guide: Converting an array structured by tuples into a multidimensional array

I'm working with an array, X[(i,j,l)], which is indexed by 3-dimensional tuples where i and j range from 1 to n, and l ranges from 1 to "layers". This binary array consists of elements that are either 0 or 1.

The array was generated as a result of solving an optimization problem using opl in CPLEX.

Now, I am attempting to access the values of X as a multidimensional array X[i][j][l] through javascript execution code in the model window.

This is my attempt:

var ofile_varx = new IloOplOutputFile("initial_varx.csv");
ofile_varx.writeln(x);

var x_arr=new Array (n);
for (var i=0; i<n; i++) {
    x_arr[i]=new Array (n);
    for (var j=0; j<n; j++) {
        x_arr[i][j]=new Array (layers);
    }
}           
for (var tup in ijl) {
    x_arr[tup.i][tup.j][tup.l]=x[tup];
}

However, when executing this, I encountered an error on the last line stating that it cannot assign a property "null" to the array.

Do you have any suggestions on how I can achieve the desired array x_arr successfully?

Thank you!

javascript arrays tuples opl

Answer 1

Answer №1

struct t
{
 int x;
 int y;
 int z;
}

int num=4;
int levels=5;
{t} xyz={<1,2,3>,<1,2,1>}

dvar int nums[xyz];
subject to
{
forall(num in xyz) nums[num]==num.x;
}


execute
{
var nums_arr=new Array (num);
for (var i=0; i<=num; i++) {
    nums_arr[i]=new Array (num);
    for (var j=0; j<=num; j++) {
        nums_arr[i][j]=new Array (levels);
    }
}           
for (var tupl in xyz) {
    nums_arr[tupl.x][tupl.y][tupl.z]=nums[tupl].solutionValue;
}
}

functions properly.

Answer 2

struct t
{
 int x;
 int y;
 int z;
}

int num=4;
int levels=5;
{t} xyz={<1,2,3>,<1,2,1>}

dvar int nums[xyz];
subject to
{
forall(num in xyz) nums[num]==num.x;
}


execute
{
var nums_arr=new Array (num);
for (var i=0; i<=num; i++) {
    nums_arr[i]=new Array (num);
    for (var j=0; j<=num; j++) {
        nums_arr[i][j]=new Array (levels);
    }
}           
for (var tupl in xyz) {
    nums_arr[tupl.x][tupl.y][tupl.z]=nums[tupl].solutionValue;
}
}

functions properly.

JavaScript guide: Converting an array structured by tuples into a multidimensional array

Answer №1

Similar questions

Modify the structure of the JSON string

What is the reason behind having all bindings resolved during each $digest cycle?

Creating functionality with a native JavaScript plugin within a directive and test suite

Troubleshooting event binding problems with jQuery

How can I pass a DOM element as a prop in Vue 3?

Remove the redundant rows and columns in the matrix

Transform the string by eliminating any spaces and new lines before converting it into a JSON object

Unable to retrieve information from v-for as it returns null data

Creating a customized file input using CSS

use JavaScript to automatically select checkboxes based on their value

Differences between Using Generic Array Creation and Array.newInstance()

Checking authentication globally using Vue.js

Creating an error handler in PHP for dynamically adding or removing input fields is a crucial step in ensuring smooth and

Exploring methods to trace the factory's property that is receiving updates from another factory within AngularJS

expanding the values associated with a key in python

Eliminate the presence of Null within an ArrayList's For loop

How can you make an Angular directive activate only after the scope function in an ng-click handler has been executed?

Problem with Resetting State in Cordova/AngularJS

Vue Router displays a blank page after being compiled

Tips for adding and deleting elements after cloning in jQuery