2 January 2024

Accessing the last element of an array in JavaScript, as demonstrated by the code snippet, is a fundamental technique for practical programming tasks. It allows you to retrieve and utilize the latest data, adapt to dynamic array sizes, optimize loop iterations, and efficiently handle array manipulations. However, it's important to note that simplicity in code can sometimes lead to potential errors. To enhance robustness, one might consider incorporating conditional statements or error-checking mechanisms, ensuring a more foolproof implementation that guards against unexpected issues during array manipulation.

Source code viewer
  1. // Get last element of array with possibility for errors.
  2. const lastElement = myArray[myArray.length - 1];
  4. // Get last element of array without possibility for errors.
  5. const length = myArray == null ? 0 : myArray.length;
  6. const lastElement length ? myArray[length - 1] : undefined;
Programming Language: ECMAScript