Question about eliminating conditional logic

Adam Sandler <>
Mon, 4 May 2009 20:36:33 -0700 (PDT)

I'm having a hard time with implementing the notion of getting rid of
some "if then else" hell.

Given the following code sample:

if (i = 1)
else if (i = 2)
else if (i = 3)
else (i = 4)

I looked in Fowler's "Refactoring"... but replace conditional with
polymorphism doesn't seem to apply -- these aren't classes, they're
method calls. I looked at
and all they did was replace the if block with switch. That doesn't
really eliminate the conditional now does it? I also read somewhere
else that I could use a map. The dilemma is my conditional calls
methods, not make assignments... so something like this really doesn't

HashMap commandMap = new HashMap();
commandMap.put(1, method(1));
commandMap.put(2, method(2));
commandMap.put(3, method(3));
commandMap.put(4, method(4));

So while I'm NOT asking the forum to do my work for me, I am an
applied learner... and given a couple of the sources I've cited in my
post, I don't quite get getting rid of this conditional logic yet.
What is the best way to get rid of this smell?


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