Implement inline ternary operator support

[ThomasBurleson]

Per discussions on Google Groups, ternary operator support should be allowed inline in attributes (directives, widgets, databinding)... similar to current support for arithmetic and booleon operator features.

[IgorMinar]

#156 is related to this

[kstep]

Yes, this would be really great! Meanwhile I use the following workaround: condition && yes_expr || no_expr which is almost identical to condition ? yes_expr : no_expr. Almost means one must be very aware the expression can fail to work correctly if yes_expr happens to evaluate to boolean false.

[zachsnow]

(Wow, just realized that this thread is really old! Hope this is still warranted.)

[cburgdorf]

That's something I have been missing for so long. I hope it will be merged.

[frosas]

To make @kstep workaround work always one can use this syntax:

condition && (yes_expr || true) || no_expr

UPDATE: Sorry, this is not as universal as I thought, it doesn't work as expected if you care about the result of yes_expr.

[nertzy]

Seems like it would encourage having more logic in the view. I don't like it. It's easy enough to build a function that returns the value you want and refer to that instead.

[gabzim]

@nertzy Templates sometimes require very basic logic. Something like "if username is set, then print it, else print 'no username given' "... That belongs in the template, not the controller, if the view changes we shouldn't have to be fixing things like that in our controllers, it increases coupling between templates and controllers unnecesarily.

Giving a bit of freedom to use a tiny bit of logic such as offered by ternary operators doesn't encourage "having more logic in the template", but rather the current implementation forces the developer to put logic in the controller that belongs in the view. Could anyone use this new feature and create a mess? Sure, but that's true of many oher angular features that are already present. An inexperienced programmer can make a mess with or without this feature.

[kstep]

I second your opinion. I couldn't say better.

[petebacondarwin]

The ternary operator is now in master: #2482.