jQuery parsing XML .each undefined issue

Question

I have a simple xml file that I'm looping over to set a ValueObject for each item node. Each VO created is added to a LinkedList data structure. The linkedList is instantiated outside the .each() loop. However, for some reason, my linkedList instance returns "undefined" inside the loop. For instance:

Model.prototype.setData = function(data) {  
    this.data = data;

    this.linkedList = new LinkedList();

    this.startItem = $(data).find('slideShow').attr('startItem');
    this.currentID = this.startItem || 1;

    $(data).find('item').each(function() {
        var imageVO = new ImageVO();
        imageVO.id = $(this).find('id').text();
        imageVO.image = $(this).find('image').text();
        imageVO.title = $(this).find('title').text();
        console.log(this.linkedList) //undefined
        this.linkedList.addNode(imageVO);
    });

    this.linkedList.currentNode = this.linkedList.findNodeByIndex(this.currentID);
}

czerasz · Accepted Answer · 2012-02-11 04:37:53Z

1

This is because this.linkedList is revering to the linkedList property of the actual item of the data collection.

Try this:

var that = this;
$(data).find('item').each(function() {
    var imageVO = new ImageVO();
    imageVO.id = $(this).find('id').text();
    imageVO.image = $(this).find('image').text();
    imageVO.title = $(this).find('title').text();
    console.log(that.linkedList) //undefined
    that.linkedList.addNode(imageVO);
});

edited Feb 11, 2012 at 4:37

answered Feb 11, 2012 at 4:30

czerasz

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2 Comments

user719958 Over a year ago

I think it's also worth mentioning that the console.log() statement is for an attribute called linkList, not linkedList.

worked Over a year ago

Thanks just noticed that too. I fixed it above to account for "linkedList" not "linkList" (typo). Thanks for the quick reply! This answer just put a lot (about what I know in terms of javascript) into perspective.

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