Objective
Create a function which takes a string as argument and return a reversed version of that string.
Method 1
1.Convert the string into an array so that we can iterate through each character.
2.Iterate the array backward and push each character into a new array. We can use the built-in reverse() function or write one ourselves.
3.Finally use .join() to convert the array back to a string and return it.
//This solution uses all javascript built-in methods
function reverseString(str){
let strArray = str.split("")
//it's important not to add space on the quotation mark here.
strArray = strArray.reverse()
return strArray.join("") //also no space on quotation mark here
}
reverseString("amazon google") //call the function
"elgoog nozama" //the returned string
Write our own reverse method:
function reverseString(str){
let revArray = [];
let strArray = str.split("")
// Looping from the end to the beginning
for(let i = strArray.length; i >= 0; i--) {
//push each character into the new array
revArray.push(strArray[i]);
}
// Joining the array elements
return revArray.join('');
}
Instead of using the built-in .split() to converse a string to array, We can also use the for ... of loop. This way we can iterate through each character of a string instead of an array.
function stackReverse(str){
let strArray = [];
for(let eachLetter of str){
strArray.push(eachLetter)
}
strArray.reverse();
return strArray.join("")
}
stackReverse("google amazon") //call the function
"nozama elgoog" //return value
This is my finding for how to reverse a string in javascript, hope you've enjoyed it.
Top comments (2)
Thanks for sharing!
Here’s my favorite way to reverse a string:
Why not use all array methods?