Testing Objects for Properties.md

Testing Objects for Properties

Sometimes it is useful to check if the property of a given object exists or not. We can use the .hasOwnProperty(propname) method of objects to determine if that object has the given property name. .hasOwnProperty() returns true or false if the property is found or not.

Example

var myObj = {
  top: "hat",
  bottom: "pants"
};
myObj.hasOwnProperty("top");    // true
myObj.hasOwnProperty("middle"); // false

The first hasOwnProperty returns true, while the second returns false.

Instructions

• Modify the function checkObj to test if an object passed to the function (obj) contains a specific property (checkProp). If the property is found, return that property's value. If not, return "Not Found".

Before

function checkObj(obj, checkProp) {
  // Only change code below this line
  return "Change Me!";
  // Only change code above this line
}

Answers

function checkObj(obj, checkProp) {
  // Only change code below this line
if (obj.hasOwnProperty(checkProp)) { 
  return obj[checkProp];
} else {

return "Not Found";
}

  // Only change code above this line
}

Thinking

Here because the args pass is a string, that mean he have quote. We need to use bracket notation.