One of the most frequent operations we perform on an array is removing the last element. There are a few different ways to do this - but one of the most common is to use the method. Consider you have the following array: pop() let myArr = [ "๐", "๐", "๐", "๐" ]; To remove the last element, all we have to do is apply : pop() let myArr = [ "๐", "๐", "๐", "๐" ]; myArr.pop(); console.log(myArr); // [ "๐", "๐", "๐" ] here that this removes the last element and modifies the original array. We have permanently changed the original array by using . Notice pop() Another common method is to use the method. Again, will modify the original array, and works in much the same way. There is no real reason to use one over the other: splice splice let myArr = [ "๐", "๐", "๐", "๐" ]; myArr.splice(-1); console.log(myArr); // [ "๐", "๐", "๐" ] Finally, another way to accomplish this without changing the original array is to use (not to be confused with ). differs from both and in that, it makes a of the original array. Removing the last element with looks like this: slice splice slice() pop() splice() shallow copy slice let myArr = [ "๐", "๐", "๐", "๐" ]; let newArr = myArr.slice(0, -1); console.log(newArr); // [ "๐", "๐", "๐" ] console.log(myArr); // [ "๐", "๐", "๐", "๐" ] Here, we store our sliced array in a new variable since and the original array remains unchanged. However, shallow copies have some quirks, such as sometimes leading to the original array changing - so it is not an independent copy. . You can learn more about shallow copies and how to create deep copies here You can also learn more about . the slice method here Also Published here
