throw is disallowed in a ternary


January 10, 2013by @prust; javascript

I hadn’t realized this before, but throw is a statement -- just like var -- and therefore cannot be used in a ternary or anywhere that requires an expression. So you can’t do this:

callback ? callback(err) : throw err;

You have to either fall back to an if/else or wrap the throw in an anonymous function.

comments powered by Disqus