Dart null / false / empty checking: How to write this shorter?

Question

This is my code for true on everything but empty string, null and false:

if (routeinfo[\"no_route\"] == \"\" || routeinfo[\"no_route\"] == null || routeinfo[         


        

Answer 1

package:quiver has an isEmpty function that returns true if the argument is null or the empty string.

It's also trivial to implement such a function yourself.