Reverse String | Leetcode #344

This video explains a basic and tricky 2 pointer technique for reversing a string.I have explained it using an example and CODE walkthrough at the end of the video. CODE LINK is present below as usual. If you find any difficulty or have any query then do COMMENT below. PLEASE help our channel by SUBSCRIBING and LIKE our video if you found it helpful...CYA :)

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[subham-raj]

I would say this one was the easiest of all the challenges till date :B

[souvikpaul]

man you deserve much more subscriber than erichito.I mean he is good in programming himself but not not good at teaching.But you are just brilliant teaching.

[PrinceKumar-prro]

Two pointers are not needed, loop from o to length/2 is enough and then values can be swapped. The only thing to take care that length/2 is int eo it works for even and odd both.
n=len(s)
for i in range(n//2):
s[i], s[n-1-i] = s[n-1-i], s[i]

[MarcoBiedermann]

Alternatively you could also use a for loop from 0 to middle of string.
Next, swap current with total - current index
```js
function swap(arr, a, b) {
[ arr[a], arr[b] ] = [ arr[b], arr[a] ];
}

function reverseString(s) {
const { length } = s;

for (let i = 0; i < length / 2; i += 1) {
swap(s, i, length - 1 - i);
}

return s;
};
```

[vinit__rai]

Nice 1, I came long time back here. But got new experience(u shown the code).

[sudhanshukumar]

One more tiny optimization would be if left and right values are same, don't swap them and move on
Edit: that way we won't have to swap characters which are same

[Agyaatr]

Sir, iwill be going in college this year
I have doubt that all are doing competative programing for getting placed in tech giants by following tourist, errictho etc and do some project at the end time to get placed

But i want to develop softwares
That's why i opt CSE
Is it good to focus more on development and leetcode and gfg questions(not like errictho aur other coders) for only placement level?

[NikhilKumar-oymx]

reverse(s.begin(), s.end());
stl reverse fun.

[Voice_Of_Thoughts]

From yesterday itself I am in a dilemma that whether you upload this video or not....😁😁😁😁😅😅😅😅

[akshitarora]

Python code:
s.reverse() # Could it be any more easier?

[muhammedjack]

can you explain and solve the problem of Google Hash Code 2020

[punjabicodingstyle]

First comment and first viewer, , but today it is two hours late

[md_aaqil]

Java Solution
class Solution {
public void reverseString(char[] s) {
int i=0, j=s.length-1;
while(i<j)
{
char temp;
temp=s[i];
s[i]=s[j];
s[j]=temp;
i++;
j--;
}
}
}

[anshshah]

For(i=strlen(str) - 1;i>=0;i++)
print(s[i])
My soln