creating javascript object literal of arrays

Question

I am from a classical OOO background and finding it difficult to understand the javascript object literal construction. I need a javascript variable containing an array of name value pairs. I should be able to push name, value pairs to the array through a function. SOmehow, I am finding it confusing to create such data structure. Could you please help me know the correct syntax for the same:

What I am looking for

var selectedItemArray = array of name, value pairs

and i should be able to

selectedItemArray.push(name, value);

and

selectedItemArray.get(index);



var tagArray = [];



for (var i in secondaryTagsArray) {
    tagArray.push({tagId:secondaryTagsArray[i].secondary_tag_id,
                   tagName:secondaryTagsArray[i].secondary_tag_name 
                   });
 }

thefourtheye · Accepted Answer · 2014-03-30 15:15:39Z

1

Key-Value pairs can be created with JavaScript Objects, with Object lietral, like this
```
{key: value}
```
Arrays can be created with Array literal ([]) or with Array constructor like this
```
new Array(size);
```

You can use both of them, like this

var array = [];
array.push({key1: value1});

Since JavaScript arrays begin with index 0, you need to access the first element with index 0, second with 1 and so on.

console.log(array[0]);

will print the first key-value pair stored at index 0.

answered Mar 30, 2014 at 15:15

thefourtheye

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6 Comments

Pradeep Over a year ago

should the key be unique? What if I have to have same name but different values for each array item?

thefourtheye Over a year ago

@user883561 Can you show some sample input? I might be able to help you understand better

thefourtheye Over a year ago

Whatever you have done with tagArray is correct only. How is secondaryTagsArray defined?

Pradeep Over a year ago

Thanks. I will go ahead with the same implementation.

thefourtheye Over a year ago

@user883561 If secondaryTagsArray is really an array, then you must use a for loop to iterate it, like this for (var i = 0; i < secondaryTagsArray.length; i += 1) {

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