ianso/rhino — comment on commit f9603b6c42d061f9a86105e41850227ed8e6bd44
File: src/org/mozilla/javascript/IdFunctionObject.java line 93
By szegedi:

A nicer, compact way to express this is:

return tag == null ? this.tag == null : tag.equals(this.tag);

You also avoid double testing for tag == null.