向多维数组JS添加维

Question

I want to add a dimension to my multidimensional array called description . The objective is to go through the array, count the children and add a "parent" dimension based on the number of elements existing in description . But i'm currently stuck trying to append information into my array. I want to add this "parent" dimension, or at least be able to put a string into the location description[x]["TimeSeries"]["parent"] . Any help on how to proceed?

(function () {
 var description;
 description = {
     1: {
         source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
         TimeSeries: {
             //parent: "#hero-three",
             title: "Clients Installed"
         }
     },
     2: {
         source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
         TimeSeries: {
             //parent: '#g2-1'
         }
     },
     3: {
         source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
         TimeSeries: {
             //parent: 
         }
     }
 };

 $(description[3]["TimeSeries"]["parent"]).append('g2-2');

 var g = new Graphene;
 g.build(description);
 alert(description[3]["TimeSeries"]["parent"]);
 }).call(this);

Answer 1

There are a few things to note here; so hopefully this should help improve your approach to what you're trying to achieve, and also answer your question in the process.

The first thing to consider is that you're not using a multi-dimensional array, you're actually using an object . The syntax for an array is var myArray = []; whereas you're using var myObject = {}; . This isn't necessarily a bad thing... objects are good!

From what I can gather, you've actually got an array of Description objects. If this is the case you'd want to construct it like so...

var descriptions = [
    {
        source: '...',
        timeSeries: {
            parent: '...',
            title: '...'
        }
    },
    {
        source: '...',
        timeSeries: {
            parent: '...',
            title: '...'
        }
    }];

You can then access your required information by doing the following:

for (var i = 0; i < descriptions.length; i++) {
    var current = descriptions[i];
    current.timeSeries.parent = '...';
}

Answer 2

You need to walk through your object. jquery's _.each function can help you doing this:

var description = {
    1: {
        source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
        TimeSeries: {
            //parent: "#hero-three",
            title: "Clients Installed"
        }
    },
    2: {
        source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
        TimeSeries: {
            //parent: '#g2-1'
        }
    },
    3: {
        source: "http://beat.entrayn.com/render?width=550&from=-2hours&until=-&height=570&colorList=FFFFFF%2C%20BBBBBB&target=*.entraynec2_ldb01.load.load5&target=*.entraynec2_ldb01.load.load1&title=DB%20EC2%20Load&_uniq=0.9870549130719155&format=json",
        TimeSeries: {
         //parent: 
        }
    }
};

var parents = ["parent1", "parent2", "parent3"];

$.each(description, function (key, value) {
    value["TimeSeries"]["parent"] = parents.shift();
});

console.log(description);

http://jsfiddle.net/yJKr9/2/ or using underscore each : http://jsfiddle.net/yJKr9/

Answer 3

Instead of:

$(description[3]["TimeSeries"]["parent"]).append('g2-2');

Use:

description[3]["TimeSeries"]["parent"] = 'Whatever you want';

Using jQuery here is weird.

Also:

var g = new Graphene; //This is bad
var g = new Graphene(); //This is good

However, I haven't used Graphene, so I don't know if it requires some arguments for constructor. To test proper assignment of parent i removed Graphene related lines from my jsfiddle: http://jsfiddle.net/f9LaC/