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 
                   });
 }

Answer 1

1. Key-Value pairs can be created with JavaScript Objects, with Object lietral, like this

   {key: value}
   

2. 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.