Help needed regarding this problem's logic

JavaScript
1

function palindrome(str) {
// Good luck!

str=str.toLowerCase();

var arr=str.split(’’);

arr=arr.filter(function(ch){
return /[a-z]/.test(ch);
});

arr=arr.reverse();

arr=arr.join(’’);

if(str===arr) return true;

else return false;

// return str.toLowerCase().split(’’).filter(function(ch){
// return /[a-z]/.test(ch);
// }).reverse().join()===str;
}

palindrome("_eye");

Can someone pls help me in finding the mistake in this approach?

Thanks in advance

2

This:

’’

is not an empty string. Those are:

'' ""
3 
testVar = _eye
arr = eye
str = _eye

testVar = race car
arr = racecar
str = race car

testVar = A man, a plan, a canal. Panama
arr = amanaplanacanalpanama
str = a man, a plan, a canal. panama

get rid of space and symbol in your str

4

Hi…yea…it’s already taken care of, using regexp…thanks

5

Hi…we can use either single quotes or double quotes to store string…right?