Array as parameter is undefined

Question

Just tried this code in JSFiddle (learning JS atm):

var checkArrayForDuplicates = new function(arrayToCheck, content) {
    alert(arrayToCheck);
}

var numbers = new Array(1, 2, 3, 4, 5, 5);    
checkArrayForDuplicates(numbers, 5);

But arrayToCheck (numbers) is always undefined inside the function. :(

Ibrahim Najjar · Accepted Answer · 2013-11-24 11:29:38Z

5

Your function definition is not correct, change to:

var checkArrayForDuplicates = function(arrayToCheck, content) {
    alert(arrayToCheck);
}

You have put new in your definition in front of the function name, and this is not the right syntax to use with new.

answered Nov 24, 2013 at 11:29

Ibrahim Najjar

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2 Comments

mosquito87 Over a year ago

Thank you. I think this is the stuff I have to deal with when moving from Java and C# to JS.

Ibrahim Najjar Over a year ago

@mosquito87 You are welcome, glad I could help. I worked with both C# and Java and still, but JavaScript (in my opinion) is much more powerful and flexible.

Qantas 94 Heavy · Accepted Answer · 2013-11-24 13:19:30Z

1

Remove the new word. It should just be:

= function () {}

edited Nov 24, 2013 at 13:19

Qantas 94 Heavy

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answered Nov 24, 2013 at 11:30

Jekis

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