readOptions

Properties

1. isArgument {Boolean}Optional

   If true, this does not try to evaluate the last value if it is a function or a compute.

   MyMap = can.Map.extend({method: function(){}});
   res = Scope.read( new MyMap(), 
                     ["method"],
                     {isArgument: true, proxyMethods: false} );
   res === MyMap.prototype.method //-> true
   

2. foundObservable {function(observe, readIndex)}Optional

   foundObservable is called when the first observable is found along the path along the read path. It's called with the readIndex where the observable was found.

   var data = {person : new can.Map({name: "Justin"})}
   Scope.read( data, 
               ["person.name"],
               {foundObservable: function(observe, readIndex){
                 observe === data.person //-> true
                 readIndex //-> 1
               }} )
   

   • observe {can.compute(getterSetter, context) | can.Map}

   • readIndex {Number}

3. earlyExit {function(observe, readIndex)}Optional

   Is called if a value is not found.

   • observe {can.compute(getterSetter, context) | can.Map}

   • readIndex {Number}

4. args {Array}

   An array of arguments to pass to observable prototype methods.

5. returnObserveMethods {Boolean}Optional

   If true, returns methods found on an observable. Otherwise, it will call the function with args as arguments and return the value.

   var Dog = can.Map.extend({
     age: function(){
       return this.attr("years")*7
     }
   })
   
   var dog = new Dog({years: 3});
   
   Scope.read(dog,"age",{}) //-> 21
   
   Scope.read(dog,
              "age",
              {returnObserveMethods: true})() //-> 21
   

6. proxyMethods=true {Boolean}Optional

   Set to false to return just the function, preventing returning a function that always calls the original function with this as the parent.