ITEC 380 2008fall ibarland

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lect08a
reflecting on code

Test cases for 120 -- refactoring is often a functional task:
v1
v2
v3
v4
v5

Even the regular program:
v1
v2
v3

UtilIan.max(Collection<T>), UtilIan.max(T...)
  compare to Scheme:
  advantages?  disadvantages?

tree-processing code: xml processing
  interface XTagHandler {
     XTag handle( XTag x );
     }
  HashMap<String,TagHandler> processors = new HashMap<String,function>();
  processors.add( "list", new TagHandler() { XTag handle( XTag x ) { ... } } );

  (processors.get(x.tagName())).handle(x)

  live example: handle a tag "linkAllFiles".





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scope: static, dynamic(perl)
  let vs let*; glitches depending on scope being entire block.
  variables in scheme: set!; begin
  A passwd object

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©2008, Ian Barland, Radford University Last modified 2008.Oct.20 (Mon)

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