In JavaScript, there are different approaches to reversing a string, but here’s a one-liner using the split()
, reverse()
, and join()
methods:
str.split("").reverse().join("");
Here’s what’s happening step by step:
-
split(”): The
split()
method splits the string into an array of characters. An empty string''
is passed as an argument to specify that each character should be a separate element in the resulting array. -
reverse(): The
reverse()
method reverses the order of the elements in the array. -
join(”): The
join()
method joins the elements of the array into a string. An empty string''
is passed as an argument to specify that there should be no separator between the elements.
Putting these methods together, we can reverse a string in one line of code.
For example:
const str = "hello world";
const reversedStr = str.split("").reverse().join(""); // Output: "dlrow olleh"
This one-liner is concise and easy to read, but it does involve creating an array and then joining it back into a string, which may not be the most efficient approach for long strings. There are other ways to reverse a string in JavaScript, such as using a for
loop or the reduce()
method, which may be more suitable for certain use cases.
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