Created
October 3, 2016 19:47
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void Main() | |
{ | |
Func<string, string, bool> anagram = (first, second) => | |
{ | |
if (first == null || second == null) return false; | |
if (first.Length != second.Length) return false; | |
var dic = new Dictionary<char, int>(); | |
foreach (var item in first) | |
{ | |
int i; | |
if (dic.TryGetValue(item, out i)) | |
{ | |
dic[item] = i + 1; | |
} | |
else | |
{ | |
dic[item] = 1; | |
} | |
} | |
//var dic = first.GroupBy(c => c).ToDictionary(kv => kv.Key, kv => kv.Count()); | |
foreach (var item in second) | |
{ | |
int i; | |
if (!dic.TryGetValue(item, out i)) | |
{ | |
return false; | |
} | |
i--; | |
if (i == 0) | |
{ | |
dic.Remove(item); | |
} | |
else | |
{ | |
dic[item] = i; | |
} | |
} | |
return true; | |
}; | |
var sw = Stopwatch.StartNew(); | |
foreach (var item in Enumerable.Range(0, 100000)) | |
{ | |
anagram(" ", " "); | |
anagram("1", "1"); | |
anagram("eros", "rose"); | |
anagram("eros", "lose"); | |
anagram("", "rose"); | |
anagram("eros", "rosesssss"); | |
anagram("bab", "aba"); | |
anagram(" ", " "); | |
anagram(null, null); | |
anagram(null, ""); | |
anagram("hoge", null); | |
anagram("1", "2"); | |
} | |
sw.Stop(); | |
$"{sw.Elapsed.TotalMilliseconds}ms".Dump("Dictionary"); | |
Debug.Assert(anagram("", "").Dump()); | |
Debug.Assert(anagram(" ", " ").Dump()); | |
Debug.Assert(anagram("1", "1").Dump()); | |
Debug.Assert(anagram("eros", "rose").Dump()); | |
Debug.Assert(anagram("eros", "lose").Dump() == false); | |
Debug.Assert(anagram("", "rose").Dump() == false); | |
Debug.Assert(anagram("eros", "rosesssss").Dump() == false); | |
Debug.Assert(anagram("bab", "aba").Dump() == false); | |
Debug.Assert(anagram(" ", " ").Dump() == false); | |
Debug.Assert(anagram(null, null).Dump() == false); | |
Debug.Assert(anagram(null, "").Dump() == false); | |
Debug.Assert(anagram("hoge", null).Dump() == false); | |
Debug.Assert(anagram("1", "2").Dump() == false); | |
Debug.Assert(anagram("abcde", "abcd").Dump() == false); | |
} |
Author
guitarrapc
commented
Oct 3, 2016
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