Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.

Please note that the string does not contain any non-printable characters.

Example:

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Input: "Hello, my name is John"
Output: 5

思路

统计字符串的片段数。片段之间用空格隔开。

注意一开始如果有空格的话，需要去掉一个间隔数。

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class Solution(object):
    def countSegments(self, s):
        """
        :type s: str
        :rtype: int
        """
        length = len(s)
        count = 0
        if (length == 0):
            return 0
        else:
            for i in range(length-1):
                if (s[i] == ' ' and s[i+1] != ' '):
                    count += 1
            if (s[0] == ' '):
                return count
            else:
                return count+1