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Which order do you prefer for null testing ternary expressions? (programming.dev)

submitted 2 years ago by [email protected] to c/[email protected]

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Which do you prefer of these two? The goal is the same. If bar is null then make foo null and avoid the exception. In other languages there is the ?. operator to help with this.

foo = bar == null ? null : bar.baz();
foo = bar != null ? bar.baz() : null;

I ask because I feel like the "English" of the first example is easier to read and has less negations so it is more straightforward, but the second one has the meat of the expression (bar.baz()) more prominently.

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[–] [email protected] -1 points 2 years ago (1 children)

The second, or early return/continue/break.

But don't forget the third option:

foo = null
if (bar != null)
    foo = bar.baz();

This is much more readable if nontrivial; the only downside is that this inhibits the practice of ubiquitous final.

Actually, doesn't Java allow lazy final if you don't initialize (that would require explicit else)? I speak too many languages ...

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

This is much less readable if non-trivial. It's easy enough here, but now I need to search through the code to see where else foo was set.