面试题 16.02 单词频率
2022-07-28
1分钟阅读时长
面试题 16.02 单词频率
设计一个方法，找出任意指定单词在一本书中的出现频率。
你的实现应该支持如下操作：
WordsFrequency(book)构造函数，参数为字符串数组构成的一本书get(word)查询指定单词在书中出现的频率
示例：
WordsFrequency wordsFrequency = new WordsFrequency({"i", "have", "an", "apple", "he", "have", "a", "pen"});
wordsFrequency.get("you"); //返回0，"you"没有出现过
wordsFrequency.get("have"); //返回2，"have"出现2次
wordsFrequency.get("an"); //返回1
wordsFrequency.get("apple"); //返回1
wordsFrequency.get("pen"); //返回1
提示：
book[i]中只包含小写字母1 <= book.length <= 1000001 <= book[i].length <= 10get函数的调用次数不会超过100000
type WordsFrequency struct {
}
func Constructor(book []string) WordsFrequency {
}
func (this *WordsFrequency) Get(word string) int {
}
/**
* Your WordsFrequency object will be instantiated and called as such:
* obj := Constructor(book);
* param_1 := obj.Get(word);
*/