reverse a string with splice method in place in javascript

To reverse a string in place using the splice method in JavaScript, we need to first convert the string to an array so that we can use array methods.

We can start by creating an array from the string using the split() method, which splits the string into an array of characters. Then, we can use the reverse() method to reverse the order of the characters in the array. Finally, we can use the splice() method to replace the original array with the reversed array.

Here's the code:

index.tsx
let str = "hello world";
let arr = str.split(""); // convert string to array
arr.reverse(); // reverse the array
str = arr.splice(0, arr.length, ...arr).join(""); // replace original array and convert back to string
console.log(str); // "dlrow olleh"
251 chars
6 lines

In the above code, splice(0, arr.length, ...arr) replaces the entire array with the reversed array. The join("") method converts the array back to a string.

Note that this approach modifies the original string in place and does not create a new string.