Array.prototype.toSpliced()
Array.prototype.toSpliced() is a JavaScript method in the Array category. Returns a new array with spliced changes (does not modify original). The syntax is array.toSpliced(start, deleteCount, ...items). A typical example: [1, 2, 3, 4].toSpliced(1, 2, 99) // [1, 99, 4]. Its time complexity is O(n), which matters when it runs over large inputs. A close sibling is Array.prototype.map(), which creates a new array populated with the results of calling a provided function on every element. A close sibling is Array.prototype.filter(), which creates a new array with all elements that pass the test implemented by the provided function. A close sibling is Array.prototype.reduce(), which executes a reducer function on each element, resulting in a single output value. A close sibling is Array.prototype.forEach(), which executes a provided function once for each array element. More about this category: Array methods for manipulating arrays — map, filter, reduce, find, and more.