Ruby在Hash中插入Key,Value元素 [英] Ruby Inserting Key, Value elements in Hash
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问题描述
我想添加元素到我的哈希列表中,它可以有多个值。这是我的代码。
$ b
I want to add elements to my Hash lists, which can have more than one value. Here is my code. I don't know how I can solve it!
class dictionary
def initialize(publisher)
@publisher=publisher
@list=Hash.new()
end
def []=(key,value)
@list << key unless @list.has_key?(key)
@list[key] = value
end
end
dic = Dictionary.new
dic["tall"] = ["long", "word-2", "word-3"]
p dic
非常感谢。
问候,
koko
推荐答案
我认为这就是您要做的事情
I think this is what you're trying to do
class Dictionary
def initialize()
@data = Hash.new { |hash, key| hash[key] = [] }
end
def [](key)
@data[key]
end
def []=(key,words)
@data[key] += [words].flatten
@data[key].uniq!
end
end
d = Dictionary.new
d['tall'] = %w(long word1 word2)
d['something'] = %w(anything foo bar)
d['more'] = 'yes'
puts d.inspect
#=> #<Dictionary:0x42d33c @data={"tall"=>["long", "word1", "word2"], "something"=>["anything", "foo", "bar"], "more"=>["yes"]}>
puts d['tall'].inspect
#=> ["long", "word1", "word2"]
编辑
现在通过 Array#uniq!
避免重复值。
d = Dictionary.new
d['foo'] = %w(bar baz bof)
d['foo'] = %w(bar zim) # bar will not be added twice!
puts d.inspect
#<Dictionary:0x42d48c @data={"foo"=>["bar", "baz", "bof", "zim"]}>
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