Created
January 31, 2023 13:14
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Design Add and Search Words Data Structure
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class TrieNode | |
attr_accessor :childrens, :leaf | |
def initialize | |
self.childrens = {} | |
self.leaf = false | |
end | |
end | |
class WordDictionary | |
def initialize | |
@root = TrieNode.new | |
end | |
def addWord(word) | |
return if word.length < 0 || word.length > 25 | |
temp = @root | |
word.each_char do |c| | |
temp.childrens[c] ||= TrieNode.new | |
temp = temp.childrens[c] | |
end | |
temp.leaf = true | |
end | |
def search(word) | |
temp = @root | |
puts dfs(temp, word, 0) | |
end | |
def dfs(node, word, index) | |
if node.childrens.key?(word[index]) | |
child = node.childrens[word[index]] | |
return true if child.leaf && index == word.length - 1 | |
return dfs(child, word, index + 1) | |
end | |
false | |
end | |
end | |
wordDictionary = WordDictionary.new | |
wordDictionary.addWord("bad") | |
wordDictionary.addWord("dad") | |
wordDictionary.addWord("mad") | |
wordDictionary.search("pad") | |
wordDictionary.search("bad") | |
wordDictionary.search("mad") |
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