To check hot, ignition, lights, dimmer, use a test light or voltmeter. To check speakers use test radio. To check speaker polarity (assuming you don't have a polarity tester): Touch (for a very short period of time) one wire to the positive side of a 1.5-volt battery (any size), and the other wire to the negative side. If speaker pops out, then polarity is correct. If speaker pops in then polarity is reversed.
JCreator LE is a light-weight development environment for Java technologies. Features include project management, templates, customizable syntax highlighting, JCreator LE is a light-weight development environment for Java technologies. Features include project management, templates, customizable syntax highlighting, Navigation
Note: All services in AngularJS are singletons. That means that the injector uses each recipe at most once to create the object. The injector then caches the reference for all future needs. Since a Factory is a more powerful version of the Value recipe, the same service can be constructed with it.