Онлайн обратно String

Without using built-in functions, I'm trying to write an algorithm to reverse a string using a list, such as,

foo

to:

oof

Attempt

import restring = "alice"string = re.findall('.',string)length = len(string)for x in range(1,int(length/2)+1):    first = string[x-1]    last = string[length-x]    string[x-1]=last    string[length-x]=firststring = "".join(string)print(string)

What might be a more efficient way to reverse a string, considering time/space complexities (using a list or without using a list would be both OK)?

How exactly can you take a string, split it, reverse it and join it back together again without the brackets, commas, etc. using python?

The question I am answering: Complete the solution so that it reverses the string value passed into it.

I answered this:

function solution(str){ str.split("").reverse().join(""); return(str);}

but it didnt work

Instead, this was the correct solution:

function solution(str){  return str.split("").reverse().join("");}

why is it that the second solution works but not the first?

If the string is "hello world", I need to flip every pair of characters and return "ehll oowlrd". The way I do it returns "olleh dlrow".

var flipPairs = function (string) {  return string.split("").reverse().join("");}

console.log(flipPairs("hello world"));// -> ehll oowlrd

I am trying to reverse a string in Lua without using the string.reverse() function. Here is my code -

 function reverseStr(s)   return string.gsub(s, "(.)(.)", "%2%1") end

The code is currently only reversing the first two characters in the string, and I am wondering what I can do to make the function reverse every character in the string.

abc -- cbabbc -- cbbdka -- akd

Thank you!