Javascript OO key value pair accessor

Question

Having trouble accessing a keyvalue pair inside an JS object, getting the following error in chrome:

Uncaught TypeError: undefined is not a function jQuery.event.dispatch jquery-2.1.0.js:4371 jQuery.event.add.elemData.handle

So, here is my code:

//Separate file named Product.js

function Product() {

    var field = {
        ProductName: "False Teeth",
        SupplierID: 7,
    }

    this.init = function () {
        //any initialisation code
    }

    var getProperty = function (propertyName) {
        return field[propertyName];
    }
};


//In another javascript file, trying to access the object

var product = new Product();

//THIS GIVES THE ERROR undefined is not a function
console.log("supplierID:" + product.getProperty("SupplierID"));

Any ideas?

Because you made `getProperty()` *private*. Just add `this.`(like you done on `init()`) to it to become *public*. — DontVoteMeDown, Aug 06 '14 at 13:55
Hi, just tried this and it gives me the value of 0, not the stored value I expected of 7 — user142617, Aug 06 '14 at 13:57

score 1 · Accepted Answer · answered Aug 06 '14 at 13:57

1

Use:

//Separate file named Product.js

function Product() {

    var field = {
        ProductName: "False Teeth",
        SupplierID: 7,
    }

    this.init = function () {
        //any initialisation code
    }

    this.getProperty = function (propertyName) {
        return field[propertyName];
    }
};


//In another javascript file, trying to access the object

var product = new Product();

//THIS GIVES THE ERROR undefined is not a function
console.log("supplierID:" + product.getProperty("SupplierID"));

answered Aug 06 '14 at 13:57

Minko Gechev

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Still gives me a 0, instead of expected 7? – user142617 Aug 06 '14 at 14:05
1

Just copy & paste the code. Either your JavaScript engine is buggy or you haven't updated your source code :-). – Minko Gechev Aug 06 '14 at 14:08
The main difference @MinkoGechev introduced was making `getProperty` a member of the `this` object: `this.getProperty = function(propertyName) ...` – Greg Burghardt Aug 06 '14 at 14:12
Thanks, you were correct. Well done – user142617 Aug 06 '14 at 14:15

Javascript OO key value pair accessor

1 Answers1