Javascript loop and remove from array
There are lot of wonderful answers on this thread already. However I wanted to share my experience when I tried to solve "remove nth element from array" in ES5 context. Show JavaScript arrays have different methods to add/remove elements from start or end. These are:
Essentially none of the above methods can be used directly to remove nth element from the array.
This basically leaves us with only one array method
Here is the code copied from original answer (with comments):
Another noteworthy method is
Having said that, we can still use
In this tutorial, you will find an elegant way of looping through an Array and removing items without breaking the for loop. The splice() method is used to remove an element; however, the array is being re-indexed when you run splice(), which means that you will skip over an index when one is removed. To fix it, you can either decrement i after a splice() or simply iterate in reverse: Javascript splice method array remove items without breaking the for looplet elements = [1, 3, 3, 5, 3, 1, 4]; for (let i = 0; i < elements.length; i++) { if (elements[i] == 3) { elements.splice(i, 1); } } console.log(elements); Javascript splice method array remove items without breaking the for looplet elements = [1, 3, 3, 5, 3, 1, 4]; let removeEl = 3; let index = elements.indexOf(removeEl); while (index !== -1) { elements.splice(index, 1); index = elements.indexOf(removeEl); } console.log(elements); let elements = [1, 3, 8, 5, 16, 1, 4]; for (i = elements.length - 1; i >= 0; --i) { if (elements[i] % 2 === 0) { elements.splice(i, 1); // Remove even numbers } } console.log(elements); This will prevent the re-index from affecting the next item in the iteration because indexing has an effect only on the items from the current point to the end of an Array, and in the iteration, the next item is lower than the current point. The splice() method modifies the contents of an Array by removing or replacing the existing elements or adding new elements in place. While it changes the original array in-place, it still returns the list of removed items. If there is no removed Array, it returns an empty one. How do you delete an element from an array loop?Use unset() function to remove array elements in a foreach loop. The unset() function is an inbuilt function in PHP which is used to unset a specified variable.
How do you remove an element from an array in JavaScript?Array elements can be deleted using the JavaScript operator delete . Using delete leaves undefined holes in the array. Use pop() or shift() instead.
How do I remove an object from an array of objects?To remove an object from an array in Javascript,. pop() – The pop() method removes from the end of an Array.. splice() – The splice() method deletes from a specific Array index.. shift() – The shift() method removes from the beginning of an Array.. Can we remove any element by using it for each loop?Unfortunately, you cannot use it everywhere. Consider, for example, the expurgate method. The program needs access to the iterator in order to remove the current element. The for-each loop hides the iterator, so you cannot call remove .
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