CSC/ECE 517 Summer 2008/wiki1 8 dm: Difference between revisions
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== Prototype-based Programming == | == Prototype-based Programming == | ||
'''In Lecture 7, we consider prototype-based programming in Ruby. The example that is given is some what artificial. Can you identify real tasks that are easier with prototype-based programming than with class-based programming? Give the code, at least in outline. ''' | |||
After researching this matter, I hit on the idea of using prototype-based programming to handle linked lists. Since the nodes would need to handle different objects, the first node implemented would serve as a prototype for nodes that contain different attributes or more complicated logic. Any container or pointer class that has to deal with a number of functions, you can either use the same | |||
Ex. | |||
<nowiki> | |||
class LinkNode | |||
attr_reader :name, :next, :value | |||
def initialize(name, next,value) | |||
@name, @next, @value = name, next, value | |||
end | |||
def getNext | |||
next | |||
end | |||
end | |||
node1 = LinkNode.new('Dave',nul,nul) | |||
node2 = LinkNode.new('John,nul,nul) | |||
module StringNode | |||
def isEmptyString? | |||
if value == nul | |||
true | |||
else | |||
false | |||
end | |||
end | |||
node1.extend(StringNode) | |||
</nowiki> | |||
Revision as of 23:00, 6 June 2008
Prototype-based Programming
In Lecture 7, we consider prototype-based programming in Ruby. The example that is given is some what artificial. Can you identify real tasks that are easier with prototype-based programming than with class-based programming? Give the code, at least in outline.
After researching this matter, I hit on the idea of using prototype-based programming to handle linked lists. Since the nodes would need to handle different objects, the first node implemented would serve as a prototype for nodes that contain different attributes or more complicated logic. Any container or pointer class that has to deal with a number of functions, you can either use the same
Ex. class LinkNode attr_reader :name, :next, :value def initialize(name, next,value) @name, @next, @value = name, next, value end def getNext next end end node1 = LinkNode.new('Dave',nul,nul) node2 = LinkNode.new('John,nul,nul) module StringNode def isEmptyString? if value == nul true else false end end node1.extend(StringNode)