这是一个小小的拼字游戏项目,我正在修补并希望得到一些关于我可能做错的事情。我有一个字母“字典”和各自的分数以及单词列表。我的想法是找到每个单词中的字母并将得分加在一起。
// Create a letter score lookup
var letterScores = new List<LetterScore>
{
new LetterScore {Letter = "A", Score = 1},
// ...
new LetterScore {Letter = "Z", Score = 10}
};
// Open word file, separate comma-delimited string of words into a string list
var words = File.OpenText("c:\\dictionary.txt").ReadToEnd().Split(',').ToList();
// I was hoping to write an expression what would find all letters in the word (double-letters too)
// and sum the score for each letter to get the word score. This is where it falls apart.
var results = from w in words
join l in letterScores on // expects an 'equals'
// join l in letterScores on l.Any(w => w.Contains(
select new
{
w,
l.Score
};
非常感谢任何帮助。 感谢。
答案 0 :(得分:19)
你不能,基本上 - LINQ中的Join
总是一个等值连接。您可以实现所需的效果,但不能使用连接。这是一个例子:
var results = from w in words
from l in letterScores
where l.Any(w => w.Contains(l.Letter))
select new { w, l.Score };
我认为这是你试图对你的查询做的,虽然它不会给你单词得分。对于完整的单词分数,我会建立一个从字母到分数的字典,如下所示:
var scoreDictionary = letterScores.ToDictionary(l => l.Letter, l => l.Score);
然后,您可以通过将每个字母的分数相加来找到每个单词的分数:
var results = from w in words
select new { Word = w, Score = w.Sum(c => scoreDictionary[c]) };
或者不作为查询表达式:
var results = words.Select(w => new { Word = w,
Score = w.Sum(c => scoreDictionary[c]) });