g0001_0100.s0009_palindrome_number.solution.rb Maven / Gradle / Ivy

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104 LeetCode algorithm problem solutions

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# #Easy #Math #Udemy_Integers #2023_11_14_Time_83_ms_(74.19%)_Space_211.1_MB_(43.29%)

# @param {Integer} x
# @return {Boolean}
def is_palindrome(x)
  return false if x < 0

  rev = 0
  local_x = x

  while local_x > 0
    rev *= 10
    rev += local_x % 10
    local_x /= 10
  end

  rev == x
end