How to create dynamic array in JavaScript?

Question

I have an array like

{
 "Count": 3,
 "Items": [
 {
 "prod_price": {
 "N": "100"
 },
 "prod_name": {
 "S": "Laptop"
 },
 "prod_Id": {
 "N": "3"
 }
 },
 {
 "prod_price": {
 "N": "1000"
 },
 "prod_name": {
 "S": "Mouse"
 },
 "prod_Id": {
 "N": "2"
 }
 },
 {
 "prod_price": {
 "N": "2000"
 },
 "prod_name": {
 "S": "Keyboard"
 },
 "prod_Id": {
 "N": "1"
 }
 }
 ],
 "ScannedCount": 3
} 

I need the output like

{
 "Count": 3,
 "Items": [
 {
 "prod_price" : "100",
 "prod_name": "Laptop",
 "prod_Id": "3"
 },
 {
 "prod_price" : "1000",
 "prod_name": "mouse",
 "prod_Id": "2"
 },
 {
 "prod_price" : "2000",
 "prod_name": "keyboard",
 "prod_Id": "1"
 },
 ],
 "ScannedCount": 3
}

I am trying to get this output but no able to get this can you help me for this.

var items=data['Items'];
 var itemresult={};
 itemvalues={};
 for(var attributename in items){
 for(var itemattribute in items[attributename]){
 for(var key in items[attributename][itemattribute]){
 console.log(itemvalues);
 itemresult.attributename.itemattribute=items[attributename][itemattribute][key];
 }
 }

I am new to node.js and don't how to work with the for loops exactly. I have tried my best, as if in php we have the for-each loop so we can skip the index value.

If I can get that so this conversion will be done. I don't know how to get that, can you please help me to find the solution?

I know there can be some problem because I don't know the exact syntax so any help would be appreciated. Thank you

• shershen: why just not to use Array.map, it's both browser/nodejs; or some of the lodash.com toolbox
• t.niese: As a note: This is not related to node but a regular JavaScript question (I know this is somehow nit picking, but you should always be clear about what it language and what it platform specific) . Beside that you should take care what kind of loop you use for which kind of object. Why is using "for...in" with array iteration such a bad idea?.

Answer 1

var items = data['Items'];
var result = [];
items.forEach(function(item) {
 result.push({
 prod_price: item.prod_price.N,
 prod_name: item.prod_name.S,
 prod_Id: item.prod_Id.N
 });
});

Optionally you could use .map:

var result = items.map(function(item) {
 return {
 prod_price: item.prod_price.N,
 prod_name: item.prod_name.S,
 prod_Id: item.prod_Id.N
 };
});

• mfeineis: It should be noted that this is only working in environments that support ES5 Array#forEach or Array#map
• Alex Booker: @vanhelgen Yep. The question is tagged Node so I think he'll be OK. Well worth pointing out, though.
• mfeineis: Ahh, fair enough. I glanced over this - but at least it's not wrong g