Write a method to compute if a string is a palindrome, disregarding spaces.

Question

Palindrome Check · Accepted Answer

isPalidrome(String s) {
removeSpaces(s);
String r = reverseString(s);
if (r == s) then 
   return True;
Otherwise
  return False;
}

Lidia · Answer

bool isPalindrom(char s[])
{
	int start = 0, length, end;
	length = end = strlen(s);
	if(end<2)
	{
		return false;
	}
	end--;
	while(start

Ozitab · Answer

In Java:

private static boolean isPalindrome(String str) {

		int leftIndex = 0;
		int rightIndex = str.length() - 1;
		
		
		while(leftIndex < rightIndex) {
			
			if (str.charAt(leftIndex) == ' ') {
				leftIndex++;
				continue;
			}
			if (str.charAt(rightIndex) == ' ') {
				rightIndex--;
				continue;
			}
			if (str.charAt(leftIndex) != str.charAt(rightIndex)) {
				return false;
			}
			
			leftIndex++;
			rightIndex--;
			
		}
		return true;
	}

N/2 iterations for characters + N iterations for whitespaces = O(N) complexity

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