lib/kissy/5.0.0-alpha.3/lib/build/event/base.js
function (s2) {
            var self = this;
            return !!util.reduce(self.keys, function (v, k) {
                return v && self[k] === s2[k];
            }, 1);
        }
function (s2) {
            var self = this;
            return !!util.reduce(self.keys, function (v, k) {
                return v && self[k] === s2[k];
            }, 1);
        }
function ( s2 ) { var self = this ; return ! ! util . reduce ( self . keys , function ( v , k ) { return v && self [ k ] === s2 [ k ] ; } , 1 ) ; }
whether current observer equals s2
@param {KISSY.Event.Observer} s2 another observer
@return {Boolean}
whether current observer equals s2