javascript - extending Function -

i've been seeing syntax:

var module = {      func: function(value) {          code;      }.func2("value");  } 

cropping in various places, wondering how done. remember seeing article while back, can't find now. whatever try .func2("value") trows syntax errors.

for example, take @ sproutcore's intro templateview.

todos.statsview = sc.templateview.extend({   remainingbinding: 'todos.todolistcontroller.remaining',    displayremaining: function() {     var remaining = this.get('remaining');     return remaining + (remaining === 1 ? " item" : " items");   }.property('remaining').cacheable() }); 

seems useful tool give users when writing factories.

thanks.

you can add properties function's prototype , chain function definitions. example:

function.prototype.trigger = function(trigger) {      var setvalue = this;      return function(thevalue) {         alert(trigger + ' set ' + thevalue);         setvalue(thevalue);     };  };  var _value = 0;  var setvalue = function(thevalue) {      _value = thevalue;  }.trigger('value');  setvalue(25); 

when setvalue defined trigger function called within scope of anonymous function it's chained to, , setvalue assigned value returned trigger. in case we're alerting setvalue being called, opens cool possibilities.

pretty slick.