Created
July 25, 2012 04:52
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HashのkeyをGrabのような検索してHashの要素を消す。
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| class Hash | |
| def delete_keys!(match_string) | |
| keys = self.all_keys | |
| keys.each do |key| | |
| if File.fnmatch?(match_string, key, File::FNM_PATHNAME) | |
| h = self | |
| split_key = key.split("/")[1..-1] | |
| split_key.each_with_index do |k, i| | |
| break if i == split_key.length - 1 | |
| h = h[k] | |
| end | |
| h.delete(split_key.last) | |
| end | |
| end | |
| end | |
| def all_keys | |
| keys = [] | |
| _all_keys("", self, keys) | |
| keys | |
| end | |
| def _all_keys(context_key, obj, keys_store) | |
| if obj.is_a?(Hash) | |
| obj.each do |k,v| | |
| _all_keys(context_key + "/" + k.to_s, v, keys_store) | |
| end | |
| else | |
| keys_store << context_key; | |
| end | |
| end | |
| end | |
| a = { "a" => { "b" => { "c" => 1} }, "e" => { "f" => 1, "g" => 2 } } | |
| a.delete_keys!("/a/**/c") | |
| a.delete_keys!("/e/*") | |
| p a #=> {"a"=>{"b"=>{}}, "e"=>{}} |
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