Skip to main content

Take a step back and understand what your code is doing (Refactor)

I was recently fixing a bug in some code and while I was figuring out what the problem was I came across some code that looked something like this:

If x == 1 Then
     doWorkBasedOn(x)
Else
     doWorkBasedOn(x)

No matter which path the code took the result would be the same as just calling doWorkBasedOn and passing x as the parameter.

My assumption is that someone started this code doing the check for x and then calling doWorkBasedOn(x) assuming that future logic would not always result in the same path. Then someone else, I hope, came in and added the else statement to get their story completed without really looking at what the previous code was doing.

Regardless of how the code got to this state, the last person to work on it should have taken a second to step back and look at what they were doing. Because this code was needlessly complex, a bug was introduced. Had this been done without this extra complexity it would have worked correctly the first time. If at any point someone had really looked at the intent of this code they probably would realized that it was doing more than it needed to.

I would suggest to take a step back and look at what your code is doing before and after you work on it and see if there is extra complexity that you can remove. This will keep your code base as easier to understand and less likely to contain bugs.

Comments

Popular posts from this blog

Converting a Large AngularJS Application to TypeScript Part 1

I work on a project that uses AngularJS heavily. Recently we wondered if using a preprocesser like CoffeeScript or TypeScript for our JavaScript would be beneficial. If our team is going to switch languages, we would need to be able to convert existing code over without much pain and we would have to find enough value in switching that it would be worth the conversion. I had read an article that stated that because TypeScript is a SuperSet of JavaScript, you could convert a plain JavaScript file to TypeScript by changing the extension to .ts and not much else would need to change. I wanted to test out this claim, so I took a file that I was familiar with, an Angular Controller, and tried to convert it to TypeScript to see how much effort it would take and then try to figure out where we would benefit from using TypeScript. This is what the controller JavaScript file looked like to start out with: ( function () { 'use strict' ; angular .module( 'app'

Interns: Taking off the training wheels

My intern team has been working for several weeks now on our new website. We have already completed one deployment to production and are finalizing our second one. We started with a plan to release often adding small bits of functionality as we go and so far that plan has been working really well. We already feel like we have accomplished a lot because we have completed many of our project's requirements and should easily be able to complete the rest giving us time to do even more than just the original requirements. One of the things I have had some difficulty balancing has been how much to lead the interns and how much to let them figure out on their own. In deciding what our team process should be and how we should allocate our time, I think it was important for me to do more leading. I saw some deficiencies in how we were currently working and brought up some ideas for how we could address them. We had moved into spending all our time just working through stories and did not

My idea for Hearthstone to add more deck slots

Recently someone asked the Blizzard developers for more slots for decks in the game Hearthstone. The response was that they are talking about it and looking into it, but no decision has been made yet. One of the concerns over adding deck slots is that it could complicate the UI for Hearthstone and make it more difficult for new players to understand. I have what I think would be a good solution to add more deck slots without increasing the learning curve for the game much if at all. First I would take a look at the current selection screen for starting to play a game. It defaults to showing the decks that are custom built by the player if they have any custom decks, and there is an option to page over to the basic decks. This basic deck screen is perfect for how I would change this process. Instead of having 2 pages of decks, 1 for basic and 1 for custom, you would just see the select a Hero screen. Then once you selected the Hero you wanted, you would see all of the decks that