Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net +972 52-548-6969

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RavenDB - High-Performance NoSQL Document Database
  previous post next post  
May 27 2009

A good refactoring session is…

time to read 1 min | 82 words

One in which I get to remove a lot of code. Here is a particularly interesting tidbits, SqlStatement is one of the core classes in NH Prof, look what I did to it:

image

For those of you not used to reading diffs, the orange marking on the side bars are removed lines. It dropped from a 484 lines to 153.

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  • Programming

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Comments

Frank Quednau
27 May 2009
21:09 PM
Frank Quednau

I tend to say that the best line of code is the one you never wrote, but this is the next best thing.

Kelly Stuard
27 May 2009
21:19 PM
Kelly Stuard

So obviously that means it does 30% less now. Or that you put 30% of the code on one line. Oh, I know ... the curley braces are no longer on their own line! Because, of course, there is no way to get rid of or refactor code.

Kelly Stuard
27 May 2009
21:19 PM
Kelly Stuard

BTW: not liking that I have to fire up an alternate browser to IE8 to post comments - not even compat mode works

Kelly Stuard
27 May 2009
21:21 PM
Kelly Stuard

Oh, and there was a </sarcasm> tag at the end of the first post; but I guess it got eaten.

Gloubidou
27 May 2009
21:22 PM
Gloubidou

YUICompressor for CSharp :-)

configurator
28 May 2009
00:04 AM
configurator

Clearly this:

class SqlStatement { public string Whatever { get { return whatever; } set { whatever = value; } } private string whatever; ... }

is much better than this:

class SqlStatement {

public string Whatever {

  get {

     return whatever;

  }

  set {

     whatever = value;

  }

}

private string whatever;

...

}

Jeremy Wiebe
28 May 2009
05:00 AM
Jeremy Wiebe

So did some of the functionality move to other classes or were you really able to remove ~300 lines and maintain similar functionality?

Erik van Brakel
28 May 2009
08:53 AM
Erik van Brakel

@configurator:

Sometimes, putting stuff on one line makes the whole more readable. I often use that with properties, to cut down on the curly-braces-porn that's going on in there:

public string Whatever { get { return whatever; } set { whatever = value; } }

public string Whenever { get { return whenever; } set { whenever = value; } }

public string However { get { return however; } set { however = value; } }

Or, if you don't like it like that:

public string Whatever

{

get { return whatever; }

set { whatever = value; }

}

En then continue using proper spacing in the rest of the code. Those properties are SO obvious that you don't really need to space it out over 8 lines.

Either way, I don't think Ayende just removed whitespace, else he wouldn't be so happy with it ;-)

Ian Nelson
28 May 2009
09:50 AM
Ian Nelson

Admit it Ayende, you moved 300+ lines of code to static methods in a SqlStatementHelper class? ;-)

Ayende Rahien
28 May 2009
12:05 PM
Ayende Rahien

Jeremy,

I create a separate class for handling that

Ayende Rahien
28 May 2009
12:06 PM
Ayende Rahien

Ian,

Almost, it is called SqlStatementProcessor, and it is a command object

Jeremy Wiebe
28 May 2009
12:14 PM
Jeremy Wiebe

Ah, so the refactoring was geting SqlStatement to be more focused. I'm always a big fan of those types of refactorings. :-)

Stephen
28 May 2009
12:21 PM
Stephen

So you didn't just randomly comment lines out and cross your fingers when hitting compile?

I remember going from a prototype to a 'v0.1' the code was about a fifth the size, was faster, easier to program against and was far more extensible..

I don't think thats so uncommon for a prototype to be 'obese' but it was really nice that its evolution was so much smaller and yet tons better.

(usual day for a dev right? I always enjoy that feeling anyway, I do a lap around the office for high fives borat style).

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