CODEWITHSUNDEEP
javascriptarraysnode.jshashtable
fancy
fancy

Reputation: 51443

Adding an array to a hashtable

I have an array full of values, myArray[]

I'm trying place this array in a hash table to pass over the socket from my node.js server.

I want the array in the hash table to contain all the same information as myArray.

var item = [
    {    hashArray: []     }
];

for (var i = 0; i < myArray.length; i++) {
    item.hashArray.push(myArray[i]);
}

I receive the error that I can't call push of undefined.

Thanks for any help!

EDIT: Thanks very much everyone, I see what I was doing wrong!

Upvotes: 0

Views: 1311

Answers (3)

jensgram
jensgram

Reputation: 31498

You're creating item as an array with an object on the zero'th index:

var item = [
    {    hashArray: []     }
];

Either let item be the object:

var item = {
    hashArray: []
};

I assume this to be what you want, unless item is meant to be an array, in which case you should push() to item[0]:

item[0].hashArray.push(myArray[i]);

EDIT
On a side-note, why not just let the hashArray array hold the values from myArray?

var item = {
    hashArray: myArray
};

(Asking out of curiosity here :) )

Upvotes: 3

El&#39;
El&#39;

Reputation: 439

item[0].hashArray.push(myArray[i]);

or 

var item = {    hashArray: []     };

Upvotes: 1

scheffield
scheffield

Reputation: 6787

you wraped the object containing hashArray in an array. To access the field hashArray you have to do the following:

item[0].hashArray.push(...)

Upvotes: 1

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