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Re: A little concept puzzle (involving refactoring)

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  Re: A little concept puzzle (involving refactoring) lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-17 16:56 +0000

#26967 — Re: A little concept puzzle (involving refactoring)

On 17/12/13 16:16, Stefan Ram wrote:
>    Here is a little puzzle about the definition of concepts:
>
>        /The behavior/ of a program I call what can be observed
>        from the outside by running the program.
>
>        /A refactor/ I call a modification of the source code of
>        a program that does not change the behavior of the program.
>
>    Now, let's test these concepts!
>
> public class Main
> { public static void main( final java.lang.String[] args )
>    { final double value = java.lang.Math.random();
>      java.lang.System.out.println( value ); }}
>
> 0.8262472065326088
>
>    Now apply the modification
>    »renameLocalVariable("value","number")«:
>
> public class Main
> { public static void main( final java.lang.String[] args )
>    { final double number = java.lang.Math.random();
>      java.lang.System.out.println( number ); }}
>
> 0.4774192830734339
>
>    The behavior has changed - so that was not a refactor!
>
>    Should we see it this way or modify our definitions?

<snip>

You're kidding right?

public class Refactor {
	
    public static double cube(double i){
       return i * i * i;
    }

    public static void main(String[] args) {
       System.out.println(cube(3.6));
    }

}

===> refactor cube <===

public class Refactor {
	
    public static double cube(double i){
       return Math.pow(i, 3);
    }

    public static void main(String[] args) {
       System.out.println(cube(3.6));
    }

}



-- 
Lipska the Kat©: Troll hunter, sandbox destroyer,
treacherous feline and farscape dreamer of Aeryn Sun
GNU/Linux user #560883 - http://www.linuxcounter.net

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