434.md

Question:

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:

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

Analysis

非常简单，题目已经说了，所谓segment就是连续的一段非空字符串，那么就是增加一个标记就行了，记录是否开始扫描一个字符串了，只要连续不断，都认为是一个，一旦中断了，那么标记重新开始计算。

Tips

go里面，判断rune需要用 ' ', 切记不可以用" "

Code

func countSegments(s string) int {
	ret := 0
	segmentBegin := false
	for _, n := range s {
		if segmentBegin {
			if n == ' ' {
				segmentBegin = false
			}
		} else {
			if n != ' ' {
				segmentBegin = true
				ret++
			}
		}
	}
	return ret
}