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The splice() method adds and/or removes array elements. The splice() method overwrites the original array.
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The splice() method of Array instances changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.
To create a new array with a segment removed and/or replaced without mutating the original array, use toSpliced(). To access part of an array without modifying it, see slice().
Parameters
start Zero-based index at which to start changing the array, converted to an integer. •Negative index counts back from the end of the array — if -array.length <= start < 0, start + array.length is used. •If start < -array.length, 0 is used. •If start >= array.length, no element will be deleted, but the method will behave as an adding function, adding as many elements as provided. •If start is omitted (and splice() is called with no arguments), nothing is deleted. This is different from passing undefined, which is converted to 0.
Return value
An array containing the deleted elements. If only one element is removed, an array of one element is returned. If no elements are removed, an empty array is returned.
The splice() method is a mutating method. It may change the content of this. If the specified number of elements to insert differs from the number of elements being removed, the array's length will be changed as well. At the same time, it uses @@species to create a new array instance to be returned.
If the deleted portion is sparse, the array returned by splice() is sparse as well, with those corresponding indices being empty slots.
Remove 0 (zero) elements before index 2, and insert "drum"Remove 0 (zero) elements before index 2, and insert "drum" and "guitar"Remove 0 (zero) elements at index 0, and insert "angel"splice(0, 0, ...elements) inserts elements at the start of the array like unshift().Remove 0 (zero) elements at last index, and insert "sturgeon"splice(array.length, 0, ...elements) inserts elements at the end of the array like push().BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.
•Indexed collections guide
•Array
•Array.prototype.concat()
•Array.prototype.push()
•Array.prototype.pop()
•Array.prototype.shift()
Summary: This tutorial shows you how to use the JavaScript Array’s splice() method to delete existing elements, insert new elements, and replace elements in an array. JavaScript Array type provides a very powerful splice() method that allows you to insert new elements into the middle of an array.
Apr 23, 2021 · The splice() method is a built-in method for JavaScript Array objects. It lets you change the content of your array by removing or replacing existing elements with new ones. This method modifies the original array and returns the removed elements as a new array.
Jun 21, 2019 · The Array#splice() function lets you modify an array in-place by adding and removing elements. It is most commonly used to remove elements from an array, but it can also be used to add elements to the middle of an array.
Sep 5, 2024 · Use the method splice() when you want to alter an array by removing, inserting, or replacing elements and use the method slice() when you want to retrieve a part of the array without having to change the array.
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Oct 6, 2024 · The splice() method is a versatile tool that allows you to modify an array by adding or removing elements at a specified index. It can also be used to replace existing elements with new ones. Syntax. The syntax for the splice() method is straightforward: syntax.js. array.splice(start, deleteCount, item1, item2, ...);
