Class WordDictionary
java.lang.Object
g0201_0300.s0211_design_add_and_search_words_data_structure.WordDictionary
public class WordDictionary
extends java.lang.Object
211 - Design Add and Search Words Data Structure.
Medium
Design a data structure that supports adding new words and finding if a string matches any previously added string.
Implement the WordDictionary
class:
WordDictionary()
Initializes the object.void addWord(word)
Addsword
to the data structure, it can be matched later.bool search(word)
Returnstrue
if there is any string in the data structure that matchesword
orfalse
otherwise.word
may contain dots'.'
where dots can be matched with any letter.
Example:
Input
["WordDictionary","addWord","addWord","addWord","search","search","search","search"] [ [],["bad"],["dad"],["mad"],["pad"],["bad"],[".ad"],["b.."]]
Output
[null,null,null,null,false,true,true,true]
Explanation
WordDictionary wordDictionary = new WordDictionary();
wordDictionary.addWord("bad");
wordDictionary.addWord("dad");
wordDictionary.addWord("mad");
wordDictionary.search("pad"); // return False
wordDictionary.search("bad"); // return True
wordDictionary.search(".ad"); // return True
wordDictionary.search("b.."); // return True
Constraints:
1 <= word.length <= 500
word
inaddWord
consists lower-case English letters.word
insearch
consist of'.'
or lower-case English letters.- At most
50000
calls will be made toaddWord
andsearch
.
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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WordDictionary
public WordDictionary()
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Method Details
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addWord
public void addWord(java.lang.String word) -
search
public boolean search(java.lang.String word)
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