How do I find out what this bug means and how to fix it? Uncaught ReferenceError: Invalid left-hand side in assignment

Question

2.00/5 (1 vote)

See more:

Hi,

I just ran my program in Chrome, and it wouldn't work, so I selected the Chrome console with F12, and this came up: Uncaught ReferenceError: Invalid left-hand side in assignment

I have no idea how to fix this, please help.

JavaScript

<html>
<body>
<script>
// Project - Level 2 JavaScript

// Array for IceCreams

var i;
var icecream = new Array();
icecream[0] = new Array();
icecream[0] = ['name'] = 'chocbar';
icecream[0] = ['price'] = parseFloat (2.50);
icecream[1] = new Array();
icecream[1] = ['name'] = 'joybar';
icecream[1] = ['price'] = parseFloat(2.75);
icecream[2] = new Array();
icecream[2] = ['name'] = 'trumpet';
icecream[2] = ['price'] = parseFloat(3.00);
icecream[3] = new Array();
icecream[3] = ['name'] = 'magnum';
icecream[3] = ['price'] = parseFloat(4.00);

for (i= 0; i < icecream.length; i++)
{
alert (icecream[i]['name'])
alert ('$' + icecream[i]['price'])
}
console.log(c);
</script>
</body>
</html>

Thanks.

Posted 13-May-15 15:02pm

Garlotch

Add a Solution

Comments

vbmike 13-May-15 21:43pm

It probably means you cannot use two '=' signs in your statement? icecream[0] = ['name'] = 'chocbar'; statement may not be valid.

Garlotch 13-May-15 22:44pm

Thanks for the info. Is it a general rule, that you can't use two '=' signs in a single statement?

Sergey Alexandrovich Kryukov 13-May-15 23:42pm

No! Isn't it obvious what part is wrong?
—SA

2 solutions

Solution 2

may be you can try this ：

C#

// constructor
function SetValue (name, price) {
    this.name = name ;
    this.price = parseFloat(price) ;
}

// instance
var icecream  = new Array() ;

icecream [0] =   new SetValue("chocbar",2.50) ;
icecream [1] =   new SetValue("joybar",2.75) ;
icecream [2] =   new SetValue("trumpet",3.00) ;
icecream [3] =   new SetValue("magnum",4.00) ;

for (var i= 0; i < icecream.length; i++)
{
    alert (icecream[i].name) ;
}

Posted 14-May-15 19:18pm

crazy999

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Accepted Answer · 2015-05-13T17:48:00

The problem is more than trivial. You don't need any "info", you need just some logical thinking.

Two assignments are irrelevant here. This is correct code:

JavaScript

var a, b;
a = b = 2

Why? Because you simply assign two objects to two variable; it is equivalent to

JavaScript

b = 2; a = b

In your invalid expression the invalid part is not the combination, but rightmost part: ~~['name'] = 'chocbar';~~. Indeed, what could it possibly mean? The object on left does not provide a reference to which you can use to access the object after the assignment. In C++ terminology, the expression ['name'] is "not an l-value", cannot appear on the left of assignment operator.

To me, it's quite hard to imagine how such a weird idea could visit anyone's head. Care to explain your logic behind that? :-)

—SA

How do I find out what this bug means and how to fix it? Uncaught ReferenceError: Invalid left-hand side in assignment

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0

Existing Members

...or Join us