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June 18, 2012 19:36
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Dictionary
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Creating a dictionary class | |
[This exercise was adapted from TestFirst.org.] | |
Create a Dictionary class. When you create a new dictionary (such as one for English), it should be an empty hash. Then, you should be able to add words and their definition by calling a method and passing in a hash as an argument. You should also be able to list all of the words and their definitions in alphabetical order with another method. Finally, you should be able to search the dictionary by passing in the first few letters of a word and returning all of the words that start with those letters, along with their definitions. | |
class Dictionary | |
attr_accessor :entries | |
def initialize | |
@entries = {} | |
end | |
def add(entry) | |
if entry.class == Hash | |
@entries.merge!(entry) | |
elsif entry.class == String | |
@entries[entry] = nil | |
end | |
end | |
def include?(word) | |
@entries.keys.include?(word) | |
end | |
def keywords | |
@entries.keys.sort | |
end | |
def find(word) | |
@entries.reject {|key,value| !key.start_with?(word)} | |
end | |
end |
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