WordDictionary (leetcode-in-java 1.21 API)

java.lang.Object
- g0201_0300.s0211_design_add_and_search_words_data_structure.WordDictionary

```
public class WordDictionary
extends 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) Adds word to the data structure, it can be matched later.
- bool search(word) Returns true if there is any string in the data structure that matches word or false 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 in addWord consists lower-case English letters.
- word in search consist of '.' or lower-case English letters.
- At most 50000 calls will be made to addWord and search.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  WordDictionary()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void addWord(String word)
  
  boolean search(String word)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- WordDictionary
```
public WordDictionary()
```

Method Detail

addWord
```
public void addWord(String word)
```

search

public boolean search(String word)