Last minute geek

last minute tech news from around the net

Tuesday, Oct 16th

Last update01:00:00 AM

You are here: English WTF Representative Line: Tern This Statement Around and Go Home

Representative Line: Tern This Statement Around and Go Home

User Rating: / 0
PoorBest 

When looking for representative lines, ternaries are almost easy mode. While there’s nothing wrong with a good ternary expression, they have a bad reputation because they can quickly drift out towards “utterly unreadable”.

Or, sometimes, they can drift towards “incredibly stupid”. This anonymous submission is a pretty brazen example of the latter:

return (accounts == 1 ? 1 : accounts)

Presumably, once upon a time, this was a different expression. The code changed. Nobody thought about what was changing or why. They just changed it and moved on. Or, maybe, they did think about it, and thought, “someday this might go back to being complicated again, so I’ll leave the ternary in place”, which is arguably a worse approach.

We’ll never know which it was.

Since that was so simple, let’s look at something a little uglier, as a bonus. “WDPS” sends along a second ternary violation, this one has the added bonus of being in Objective-C. This code was written by a contractor (whitespace added to keep the article readable- original is all on one line):

    NSMutableArray *buttonItems = [NSMutableArray array];
    buttonItems = !negSpacer && !self.buttonCog
            ? @[] : (!negSpacer && self.buttonCog 
            ? @[self.buttohttps://github.com/RemyPorter/MassnCog] : (!self.buttonCog && negSpacer 
            ? @[negSpacer] : @[negSpacer,self.buttonCog]));

This is a perfect example of a ternary which simply got out of control while someone tried to play code golf. Either this block adds no items to buttonItems, or it adds a buttonCog or it adds a negSpacer, or it adds both. Which means it could more simply be written as:

   NSMutableArray *buttonItems = [NSMutableArray array];
   if (negSpacer) {
        [buttonItems addObject:negSpacer];
    }
    if (self.buttonCog) {
        [buttonItems addObject:self.buttonCog];
    }
[Advertisement] Forget logs. Next time you're struggling to replicate error, crash and performance issues in your apps - Think Raygun! Installs in minutes. Learn more.

Read all
Comment Policy:
We pre-moderate any comments and welcome all kinds of thoughts, supportive, dissenting, critical or otherwise. We delete or censor comments that are:

* abusive
* off-topic
* contain personal attacks, or against any company or organization
* promote hate of any kind
* use excessively foul language
* is blatantly spam or advertising

We do not discriminate based on the person who is posting, and we never censor comments for political or ideological reasons. We never delete an appropriate comment because we disagree with its viewpoint or ideology, and we never publish an inappropriate comment because we agree with or support its viewpoint or ideology.


Attention spammers: we manually approve all comments. Spamming and blatant advertising will NOT be published on this site and is deleted immediately, you've been warned, do not waste your time here.

Add comment

Security code
Refresh