Remove element from multidimensional array javascript
I'm having trouble cycling through a multidimensional array and deleting a specific element array. My multidimensional array looks a little like this: Show
So if I have the number 29. What's the most efficient way to cycle through this array and delete the array element who's second element is 29? i.e. ["Dick", "29"] asked Jul 11, 2013 at 19:44
4
.filter uses native code to loop over your array. Building a new array could of course be more expensive than just cutting a part out of the old one, to be tested. answered Jul 11, 2013 at 19:52
tomdemuyttomdemuyt 4,5221 gold badge31 silver badges59 bronze badges 2
answered Jul 11, 2013 at 19:58
brbcodingbrbcoding 13k2 gold badges35 silver badges51 bronze badges
Check Demo Here https://onecompiler.com/javascript/3y9unh6vt answered Jul 13 at 10:11
The answer by brbcoding deletes the content of the array element but does not delete it. Here is a way around that:
https://jsfiddle.net/tmzshopping/dfdveazk/ The splice removes one row (the 1 in the argument), you can remove 2 rows by replacing the 1 by 2. i-- reduces the length of the array. answered Jan 27, 2018 at 13:29
answered Jul 27, 2020 at 14:22
Aditya parmarAditya parmar 11 gold badge1 silver badge2 bronze badges Summary: in this tutorial, you will learn how to work with a JavaScript multidimensional array and manipulate its elements effectively. Introduction to JavaScript multidimensional arrayJavaScript does not provide the multidimensional array natively. However, you can create a multidimensional array by defining an array of elements, where each element is also another array. For this reason, we can say that a JavaScript multidimensional array is an array of arrays. The easiest way to define a multidimensional array is to use the array literal notation. To declare an empty multidimensional array, you use the same syntax as declaring one-dimensional array:
The following example defines a two-dimensional array named
In the To show the
The following illustrates the output:
Note that the To access an element of the multidimensional array, you first use square brackets to access an element of the outer array that returns an inner array; and then use another square bracket to access the element of the inner array. The following example returns the second element of the first inner array in the
Adding elements to the JavaScript multidimensional arrayYou can use the Array methods such as For example, to add a new element at the end of the multidimensional array, you use the
To
insert an element in the middle of the array, you use the
Here is the output:
This example calculates the percentage of the hours spent on each activity and appends the percentage to the inner array.
The following shows the output in the console:
Removing elements from the JavaScript multidimensional arrayTo remove an element from an
array, you use the For example, the following statement removes the last element of the
Output:
Similarly, you can remove the elements from the inner array of the multidimensional array by using the
Output:
Iterating over elements of the JavaScript multidimensional arrayTo iterate a multidimensional array, you use a nested for loop as in the following example.
The first loop iterates over the elements of the outer array and the nested loop iterates over elements of the inner array. The following shows the output of the script in the console:
Or you can use the
Output:
In this tutorial, you have learned how to use an array of arrays to create a JavaScript multidimensional array.
Was this tutorial helpful ? |