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JavaScript selecting Object Arraylike?

The Problem is the following:
I have a JSON file that has objects with the following name: "item0": { ... }, "item1": { ... }, "item2": { ... }. But I can't access them when going through an if method.
What I've done so far:
$.getJSON('/assets/storage/items.json', function(data) {
jsonStringify = JSON.stringify(data);
jsonFile = JSON.parse(jsonStringify);
addItems();
});
var addItems = function() {
/* var declarations */
for (var i = 0; i < Object.keys(jsonFile).length; i++) {
path = 'jsonFile.item' + i;
name = path.name;
console.log(path.name);
console.log(path.type);
}
}
If I console.log path.name it returns undefined. But if I enter jsonFile.item0.name it returns the value. So how can I use the string path so that it's treated like an object, or is there an other way on how to name the json items.

As others stated 'jsonFile.item' + i is not retrieving anything from jsonFile: it is just a string.
Other issues:
It makes no sense to first stringify the data and then parse it again. That is moving back and forth to end up where you already were: data is the object you want to work with
Don't name your data jsonFile. It is an object, not JSON. JSON is text. But because of the above remark, you don't need this variable
Declare your variables with var, let or const, and avoid global variables.
Use the promise-like syntax ($.getJSON( ).then)
Iterate object properties without assuming they are called item0, item1,...
Suggested code:
$.getJSON('/assets/storage/items.json').then(function(data) {
for (const path in data) {
console.log(data[path].name, data[path].type);
}
});

What you want is to use object notation using a dynamic string value as a key instead of an object key. So, instead of using something like object.dynamicName you either have use object[dynamicName].
So in your example it would be like this.
path = 'item' + i;
jsonFile[path].name

I'm afraid you cannot expect a string to behave like an object.
What you can do is this:
path = `item${i}`
name = jsonFile[path].name

Create JSON for chart Data

I want to create a dummy json data and use it for highChart.
This is how I am creating json array
var summaryData = {
WestWorld:[
{"Jan":7894},
{"Feb":7845},
{"March":5826},
{"April":7930},
{"May":1589},
{"June":7891},
{"July":9724},
{"August":7403},
{"September":5566},
{"October":7733},
{"November":1186},
{"December":4456}
],
EastWorld:[
{"Jan":7410},
{"Feb":9512},
{"March":7520},
{"April":8510},
{"May":9965},
{"June":72580},
{"July":147},
{"August":4489},
{"September":6685},
{"October":7036},
{"November":8852},
{"December":4569}
]
};
Now I intend to use this data for drawing charts.I am able to retrieve the keys by doing so
for (var key in summaryData){
console.log(summaryData[''+key+'']);
}
It is consoling an two arrays each of twelve objects.
Can I create this json object in a better way & minimize the if & for loop to get it's keys & value

You can setup your JSON like so:
var summaryData = {
WestWorld: {
"Jan":7894,
"Feb":7845,
...
},
EastWorld: {
"Jan":7410,
"Feb":9512,
...
}
};
This way you can access anything directly, without having to loop through the arrays in WestWorld and EastWorld. For example:
summaryData.WestWorld.Jan => 7894

summaryData has two objects that are arrays and in this case array of objects.
This will retrieve one array and its length
console.log((summaryData.EastWorld).length);
Show the first array element which is an object with a single key:value
console.log(summaryData.EastWorld[0]);
to get its value
console.log(summaryData.EastWorld[0].Jan);
A function to retrieve each key:value pair
function show(world) {
var len = (summaryData[world]).length;
var obj = "";
var ii = 0;
for (ii; ii < len; ii += 1) {
obj = summaryData[world][ii];
for (var key in obj) {
console.log(key + ' ==> ' + obj[key]);
}
}
}
show("WestWorld");
show("EastWorld");
To be a true JSON each string need to be double quoted
check with an online JSON Validation..

Using concatenation and a passed parameter to loop through an array

var Animals = {
"Europe": { "weasel.jpg": "squeak", "cow.jpg": "moo"},
"Africa": { "lion.jpg": "roar", "gazelle.jpg": "bark"},
};
function region(a){
var b = "Animals."+a;
for(var index in b) {
var target = document.getElementById('div1');
var newnode = document.createElement('img');
newnode.src = index;
target.appendChild(newnode)
}
}
RELEVANT HTML
<li onclick="europe('Europe')">Europe</li>
Goal: on the click of the Europe <li>, pass the word Europe into my region function where it is then concatenated to produce Animals.Europe
This is in order to identify an array within the object structure at the top using the for(var index in Animals.Europe) loop. Why is the concatenation which produces Animals.Europe not treated in the same way as if I had typed this out?
In addition, you can see that I have used arrays to store an image source and description for different animals. Using my limited coding knowledge this was all I could think of. Is there an easier way to store image/description data in order to produce in HTML?

"Animals." + a is just a string value, e.g. "Animals.Europe", which is not the same thing as Animals.Europe. If you change the first line to var b = Animals[a];, you should be all set.
Edit: and as elclanrs pointed out, it should be region('Europe'), not europe('Europe').

Why is the concatenation which produces Animals.Europe not treated in the same way as if i had typed this out?
In this case the variable b is just a string ("Animals.Europe"), which is treated like any other string (i.e. a list of characters). This means that when you attempt to loop through it (for(index in b)) you will be looping over a simple list of characters.
What you can do instead is use the square brace notation of accessing an objects properties. This means you can instead write var b = Animals[a], retrieving attribute a from Animals. You can read more about working with objects in this way on this MDN page

You can access the europe property using the following
Animals[a]
Also you're calling a "europe" function when you should be calling "region"
You're not storing animals in arrays here, but in objects with the image names as keys. Usually you'll want to use relevant names as keys. For example if you want arrays of animals for each continent
var Animals = {
"Europe": [{
imageSrc: "weasel.jpg",
cry: "squeak"
},{
imageSrc: "cow.jpg",
cry: "moo"
}],
"Africa": [{
imageSrc: "lion.jpg",
cry: "roar"
},{
imageSrc: "gazelle.jpg",
cry: "bark"
}]
};
Now Animals['Europe'] gives an array of objects, where you could eventually store other properties. So if b is an array your loop will now look like:
var b = Animals['Europe'];
for(var i=0; i < b.length; i++) {
var target = document.getElementById('div1');
var newnode = document.createElement('img');
var animalData = b[i]; // The array item is now an object
newnode.src = animalData.imageSrc;
target.appendChild(newnode)
}

Dynamically assigning object keys and values with "for"

I have a function, SWFUpload_config, which takes an argument, post_params_arr - an object.
post_params_arr = {"ajaxtask":"swfupload_files", "param": "2012"}
I need to parse that post_params_arr and dynamically add keys and values to swfu_settings in the following way (please notice that swfu_settings has by default 'SWFSESSID' : session_id and all other keys:values must be added from post_params_arr):
function SWFUpload_config (post_params_arr) {
var swfu_settings = {
'SWFSESSID' : session_id,
'ajaxtask' : 'swfupload_files',
'param' : '2012'
};
}
How can I achieve that? How would I parse post_params_arr inside swfu_settings where I am assigning keys and values?

The same way you'd access any other object...
var swfu_settings = {
ajaxtask: post_params_arr.ajaxtask,
param: post_params_arr.param
};
Or do you mean it's JSON? If you have jQuery, parse it using jQuery.parseJSON; otherwise, use JSON.parse and fall back on eval('(' + post_params_arr + ')').
If you need to shallow-clone the object for some reason, a for in loop will work:
var swfu_settings = {
SWFSESSID: 'blah'
// etc.
};
for(var x in post_params_arr) {
if(post_params_arr.hasOwnProperty(x)) {
swfu_settings[x] = post_params_arr[x];
}
}

Looping to Parse JSON Data

Description and Goal:
Essentially data is constantly generated every 2 minutes into JSON data. What I need to do is retrieve the information from the supplied JSON data. The data will changed constantly. Once the information is parsed it needs to be captured into variables that can be used in other functions.
What I am stuck in is trying to figure out how to create a function with a loop that reassigns all of the data to stored variables that can later be used in functions.
Example information:
var json = {"data":
{"shop":[
{
"carID":"7",
"Garage":"7",
"Mechanic":"Michael Jamison",
"notificationsType":"repair",
"notificationsDesc":"Blown Head gasket and two rail mounts",
"notificationsDate":07/22/2011,
"notificationsTime":"00:02:18"
},
{
"CarID":"8",
"Garage":"7",
"Mechanic":"Tom Bennett",
"notificationsType":"event",
"notifications":"blown engine, 2 tires, and safety inspection",
"notificationsDate":"16 April 2008",
"notificationsTime":"08:26:24"
}
]
}};
function GetInformationToReassign(){
var i;
for(i=0; i<json.data.shop.length; i++)
{
//Then the data is looped, stored into multi-dimensional arrays that can be indexed.
}
}
So the ending result needs to be like this:
shop[0]={7,7,"Michael Jamison",repair,"Blown Head gasket and two rail mounts", 07/22/2011,00:02:18 }
shop[1]={}

You can loop through your JSON string using the following code,
var JSONstring=[{"key1":"value1","key2":"value2"},{"key3":"value3"}];
for(var i=0;i<JSONstring.length;i++){
var obj = JSONstring[i];
for(var key in obj){
var attrName = key;
var attrValue = obj[key];
//based on the result create as you need
}
}
Hope this helps...

It sounds to me like you want to extract the data in the "shop" property of the JSON object so that you can easily reference all of the shop's items. Here is an example:
var json =
{
"data":
{"shop":
[
{"itemName":"car", "price":30000},
{"itemName":"wheel", "price":500}
]
}
},
inventory = [];
// Map the shop's inventory to our inventory array.
for (var i = 0, j = json.data.shop.length; i < j; i += 1) {
inventory[i] = json.data.shop[i];
}
// Example of using our inventory array
console.log( inventory[0].itemName + " has a price of $" + inventory[0].price);

Well, your output example is not possible. You have what is a list of things, but you're using object syntax.
What would instead make sense if you really want those items in a list format instead of key-value pairs would be this:
shop[0]=[7,7,"Michael Jamison",repair,"Blown Head gasket and two rail mounts", 07/22/2011,00:02:18]
For looping through properties in an object you can use something like this:
var properties = Array();
for (var propertyName in theObject) {
// Check if it’s NOT a function
if (!(theObject[propertyName] instanceof Function)) {
properties.push(propertyName);
}
}
Honestly though, I'm not really sure why you'd want to put it in a different format. The json data already is about as good as it gets, you can do shop[0]["carID"] to get the data in that field.