You want to get the last item in an array, how do you do this?
There are multiple methods that can be used to get the last item in an array. Here are some ways to do this.
length
PropertyYou can use the length of an array and subtract 1 from it to get the index of the last item in an array:
const arr = ["Ferrari", "Toyota", "Kia"]; const lastItem = arr[arr.length - 1]; console.log(lastItem); // Kia
You can also use the at()
method, which returns an item at a given index:
const arr = ["Ferrari", "Toyota", "Kia"]; const lastItem = arr.at(arr.length - 1); console.log(lastItem); // Kia
These methods don’t change the array. If the array is empty, then lastItem
will be undefined
.
pop()
You can also use the pop()
method to get the last item in an array:
const arr = ["Ferrari", "Toyota", "Kia"]; const lastItem = arr.pop(); console.log(lastItem); // Kia console.log(arr); // ["Ferrari", "Toyota']
This method removes the last item in the array and returns it. It modifies the array. Like the previous methods, if the array is empty, lastItem
will be undefined
.
You can use various other methods such as slice()
, reduce()
, or a for
loop to get the last item in an array. These methods can be less readable than the methods described above. The methods that modify the array or create a new item will be less efficient, in terms of the number of operations that can be performed per second, than solutions that only read what the last item is. However, the performance difference is unlikely to be significant in most applications.