jianminchen
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 Sept. 7, 2018
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 Add a new folder with those three examples, one is conditional version, naive one, break Single responsiblity principle; second one is to separate OpNode and ValueNode; third one is to apply polymorphic solution, for each operator, there is one class for the oeprator.
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`@@ -32,4 +32,5 @@ https://github.com/jianminchen/Object-oriented-Design/blob/master/Small%20Exampl`
`32`	`32`
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`34`	`34`	`Sept. 7, 2018`
	`35`	`+`
`35`	`36`	`Add a new folder with those three examples, one is conditional version, naive one, break Single responsiblity principle; second one is to separate OpNode and ValueNode; third one is to apply polymorphic solution, for each operator, there is one class for the oeprator.`