Troubleshooting a Multi-dimensional Array Reference Issue

Question

Troubleshooting a Multi-dimensional Array Reference Issue

Currently, I am working with an Array and need to modify the last item by pushing it back. Below is a simplified version of the code:

var array = [
                 [ [0,1,2], [3,4,5] ]
            ];

//other stuff...

var add = array[0].slice(); //creating a clone of the array (not functioning as expected)
add[0][0] = 10;
array.push(add);

console.log(array);

Here is the resulting output:

Upon inspection, both the first and second items in the array have their first element changed to 10. How do I go about resolving this issue? The array has already been cloned.

javascript arrays reference

Answer 1

Answer №1

Array.prototype.slice() creates a shallow copy, meaning nested arrays are not duplicated. To achieve a deep cloning effect, it is recommended to use a method like the one described here.

Answer 2

Array.prototype.slice() creates a shallow copy, meaning nested arrays are not duplicated. To achieve a deep cloning effect, it is recommended to use a method like the one described here.

Answer 3

Answer №2

When using Array.prototype.slice(), be aware that it does not actually clone nested arrays. To address this issue, you can employ a technique like the one demonstrated below:

var array = [
                 [ [0,1,2], [3,4,5] ]
            ];

//additional code...

var copy = array[0].slice(); //create a shallow copy of the array (note: this may not fully clone nested arrays)
copy[0] = array[0][0].slice();
copy[0][0] = 10;
array.push(copy);

console.log(array);

Answer 4

When using Array.prototype.slice(), be aware that it does not actually clone nested arrays. To address this issue, you can employ a technique like the one demonstrated below:

var array = [
                 [ [0,1,2], [3,4,5] ]
            ];

//additional code...

var copy = array[0].slice(); //create a shallow copy of the array (note: this may not fully clone nested arrays)
copy[0] = array[0][0].slice();
copy[0][0] = 10;
array.push(copy);

console.log(array);

Troubleshooting a Multi-dimensional Array Reference Issue

Answer №1

Answer №2

Similar questions

Tips on how to increase and update the index value by 2 within an ngFor loop while maintaining a fixed format

Obtaining the data from the React material-UI Autocomplete box

How to toggle between arrays using ng-repeat

Retrieving information from an Object within a JSON response

What is the method for displaying the value of a textarea?

Alter text within a string situated between two distinct characters

Error in Redux app: Attempting to access the 'filter' property of an undefined value

One of my AngularJS directives seems to be malfunctioning while the rest are working fine. Can you help me troubleshoot

When browserify is utilized, the error "function is not defined" may show up as an Un

Updating parameter value upon the execution of an internal function in Javascript

What is the correct way to promise-ify a request?

What is the best way to show a nested div element within a v-for loop in Vue.js?

What techniques can I use to merge alpha channels with compositing in images?

Acquire the S3 URL link for the uploaded file upon completion of the file upload process

Struggling to manage texbox with Reactjs

Insufficient module names remaining in NPM

Exploring the functionality of event.target.name.value

Arrange the objects in the array in React based on their time and date of creation

Managing stream pauses and resumes in Node.js using setTimeout()

What is the best way to change the number 123456789 to look like 123***789 using either typescript or