Which of the following array methods does not mutate the original array in JavaScript?
- splice()
- push()
- concat()
- pop()
The concat() method in JavaScript creates a new array that combines the elements of the original array and the elements passed as arguments, without modifying the original array. The other methods, such as splice(), push(), and pop(), directly modify the original array.
Loading...
Related Quiz
- You are creating a function that accepts an arbitrary number of arguments and returns an array of those arguments. How would you use the rest operator in this scenario to collect all the passed arguments?
- In Express.js, to catch errors from a promise within a route, the next function should be called with the ______ as an argument.
- When are CORS preflight requests sent by the browser?
- In what scenario would you need to create a custom error class in Express.js?
- How can you define optional route parameters in Express.js?