Look at the following script code to understand better. Let’s create a JavaScript program to slice out a portion of elements of an array with different indexes. JavaScript does not use their old indexes to place their new elements in the array.Īfter slicing out elements of an array, the slicedArray looks like the following table: IndexĪs you observe in the output, the first array, “names” is unaffected by slicing.Ģ. When JavaScript copies a portion of an array, it copies the new elements to an array in which indexes start from 0, 1, 2….
Original array: Paul,Ivaan,Adam,Bob,Deep (Original array unaffected) Let names = ĭocument.write("Original array: " +names, "") ĭocument.write("Sliced array: " +slicedArray) We would call slice() method and specify a start index of 1 and an end index of 3. Suppose we want to create a new array with elements 1, Ivaan, and 2, Adam. Suppose we have an array of names shown in the following table: Index
JavaScript Array slice() Method Exampleġ. If either argument start or end is a negative value, it specifies an array element relative to the last element in the array. In other words, the returned array contains the element specified by the first parameter start and all subsequent elements up to, but not including element the specified by the second parameter end. If both start and end indexes are specified, the slice() method creates a sequence of elements that begins from the start index up till the end index – 1. In other words, the returned array contains all elements from the starting to ending of the array. If only one parameter (index value) is specified, the slice() method creates a sequence of elements that begins from index and ends on the last array element. A new array that contains the sliced out or extracted elements.
The slice() method returns a shallow copy of elements from the original array. The slice() method of Array object comes into two flavors that are as: array.slice(index)
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