GO语言核心30讲 笔记

题目：

题解：

func isMatch(s string, p string) bool {
    for len(s) > 0 && len(p) > 0 && p[len(p)-1] != '*' {
        if charMatch(s[len(s)-1], p[len(p)-1]) {
            s = s[:len(s)-1]
            p = p[:len(p)-1]
        } else {
            return false
        }
    }
    if len(p) == 0 {
        return len(s) == 0
    }
    sIndex, pIndex := 0, 0
    sRecord, pRecord := -1, -1
    for sIndex < len(s) && pRecord < len(p) {
        if p[pIndex] == '*' {
            pIndex++
            sRecord, pRecord = sIndex, pIndex
        } else if charMatch(s[sIndex], p[pIndex]) {
            sIndex++
            pIndex++
        } else if sRecord != -1 && sRecord + 1 < len(s) {
            sRecord++
            sIndex, pIndex = sRecord, pRecord
        } else {
            return false
        }
    }
    return allStars(p, pIndex, len(p))
}

func allStars(str string, left, right int) bool {
    for i := left; i < right; i++ {
        if str[i] != '*' {
            return false
        }
    }
    return true
}

func charMatch(u, v byte) bool {
    return u == v || v == '?'
}