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Javascript looping through variables

So right now this is my current code and I'm trying to figure out a way to loop through the variables I've already declared (Assuming variables 1-9 already have values). I just wanted to know whether this was possible at all?
var title;
var brief;
var hover;
var whatTitle;
var whatDesc;
var whyTitle;
var whyDesc;
var funTitle;
var funDesc;
var titles = [];
var briefs = [];
var hovers = [];
var whatTitles = [];
var whatDescs = [];
var whyTitles = [];
var whyDescs = [];
var funTitles = [];
var funDescs = [];
var obj = {'titles' : title};
if(localStorage.getItem('titles') != null) {
var tmp = JSON.parse(localStorage.getItem('titles'));
for(var i = 0;i<tmp.length;i++) {
titles.push(tmp[i]);
}
}
titles.push(obj);
localStorage.setItem("titles", JSON.stringify(titles));
Output I want if we printed out the looped code:
var obj = {'titles' : title};
if(localStorage.getItem('titles') != null) {
var tmp = JSON.parse(localStorage.getItem('titles'));
for(var i = 0;i<tmp.length;i++) {
titles.push(tmp[i]);
}
}
titles.push(obj);
localStorage.setItem("titles", JSON.stringify(titles));
var obj = {'briefs' : brief};
if(localStorage.getItem('briefs') != null) {
var tmp1 = JSON.parse(localStorage.getItem('briefs'));
for(var i = 0;i<tmp.length;i++) {
briefs.push(tmp[i]);
}
}
briefs.push(obj);
localStorage.setItem("briefs", JSON.stringify(briefs));
var obj = {'hovers' : hover};
if(localStorage.getItem('hovers') != null) {
var tmp2 = JSON.parse(localStorage.getItem('hovers'));
for(var i = 0;i<tmp.length;i++) {
hovers.push(tmp[i]);
}
}
hovers.push(obj);
localStorage.setItem("hovers", JSON.stringify(hovers));
...etc

If the code is running in a browser, then you can do something like:
for(key in window) { console.log(window[key]) } // print all variables
The variables are associated to the global namespace. That is to say the upmost "this" reference or the window object.

You're almost there with the code you have. If you look at your "desired output" examples, you'll see that the only thing that really differs between each element of your "unrolled loop" is the key for local storage ('titles', 'briefs', 'hovers').
With that in mind, you could use an Object to map the keys to the variables you have at the top level. So this:
var titles = [];
var briefs = [];
var hovers = [];
var whatTitles = [];
var whatDescs = [];
...
Becomes (UPDATE: with the initializer values preserved):
var key_to_collection = {
'titles': [title],
'briefs': [brief],
'hovers': [hovers],
'whatTitles': [whatTitles],
'whatDescs': [whatDescs],
}
Then, you loop over the values of this object:
Object.keys(key_to_collection).forEach(function(key) {
var obj = {};
collection = key_to_collection[key];
obj[key] = collection;
if(localStorage.getItem(key) != null) {
var tmp = JSON.parse(localStorage.getItem(key));
for(var i = 0;i<tmp.length;i++) {
collection.push(tmp[i]);
}
}
collection.push(obj);
localStorage.setItem(key, JSON.stringify(collection));
});

If your variable name is title for example, then you can access it using window['title']. This means that if you define an array of your global variable names:
const varNames = ['title', 'brief', 'hover', ...]
Then you can do a loop like the following
for(const name of varNames) {
const value = window[name]
// do whatever you want using the variable name and value
}
I hope this solves your issue :)

Get variables from URL and convert to array

I need to retrieve variables from an URL.
I use this found function:
function getParams(str) {
var match = str.replace(/%5B/g, '[').replace(/%5D/g, ']').match(/[^=&?]+\s*=\s*[^&#]*/g);
var obj = {};
for ( var i = match.length; i--; ) {
var spl = match[i].split("=");
var name = spl[0].replace("[]", "");
var value = spl[1];
obj[name] = obj[name] || [];
obj[name].push(value);
}
return obj;
}
var urlexample = "http://www.test.it/payments/?idCliente=9&idPagamenti%5B%5D=27&idPagamenti%5B%5D=26"
var me = getParams(stringa);
The output is:
{"idPagamenti":["26","27"],"idCliente":["9"]}
But idCliente is always NOT an array, so i'd like to retrieve:
{"idPagamenti":["26","27"],"idCliente": 9 }
This is the fiddle example
function getParams(str) {
var match = str.replace(/%5B/g, '[').replace(/%5D/g, ']').match(/[^=&?]+\s*=\s*[^&#]*/g);
var obj = {};
for ( var i = match.length; i--; ) {
var spl = match[i].split("=");
var name = spl[0].replace("[]", "");
var value = spl[1];
obj[name] = obj[name] || [];
obj[name].push(value);
}
return obj;
}
var stringa = "http://www.test.it/payments/?idCliente=9&idPagamenti%5B%5D=27&idPagamenti%5B%5D=26"
var me = getParams(stringa);
$(document).ready(function(){
alert("testing");
console.log(me);
$(".a").html(JSON.stringify(me));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="a">
</div>
Someone can help me to modify code?

I think your facing a real paradigm problem. Why idCliente wouldn't be an array but idPagamenti would be. You should have all array or none but not both. getParams() function can make this choice for you and you should probably change the way you are working with this.
Anyway, here is a getParams() function that replace any single-valued array to a value. Note that if you have only one idPagamenti in your URI, you will also have a single value for idPagamenti instead of an array.
function getParams(str) {
var match = str.replace(/%5B/g, '[').replace(/%5D/g, ']').match(/[^=&?]+\s*=\s*[^&#]*/g);
var obj = {};
for ( var i = match.length; i--; ) {
var spl = match[i].split("=");
var name = spl[0].replace("[]", "");
var value = spl[1];
obj[name] = obj[name] || [];
obj[name].push(value);
}
Object.keys(obj).forEach(key => {
if (obj[key].length === 1) {
obj[key] = obj[key][0];
}
})
return obj;
}
var urlexample = "http://www.test.it/payments/?idCliente=9&idPagamenti%5B%5D=27&idPagamenti%5B%5D=26"
var me = getParams(stringa);
If you know that you will always get ids as parameters, you can also add a parseInt() for each parameter by replacing var value = spl[1]; with var value = parseInt(spl[1], 10);

returning nested json values using loop (google spreadsheet)

I have this google spreadsheet script that pulls in json formatted book data. I have no problem displaying book title and author, but he "offerData" object can contain a different amount of elements (prices from sellers) depending on the book. Right now I created a loop and am storing the offerData values like so:
price[i] = offerdata.offers[i]["price"];
condition[i] = offerdata.offers[i]["condition"];
seller[i] = offerdata.offers[i]["seller"]["displayName"];
and am returning the data like this:
var resultRow = [[title, specstag, price[0], condition[0], seller[0], price[1], condition[1], seller[1], price[2], condition[2], seller[2]]];
Obviously this only returns 3 sellers with price, condition, seller info. The issue is that a book doesn't always have 3 sellers, it can be anywhere from 1 to 10 or so.
My question is how can I return all offerData (price/condition/seller) here? :
var resultRow = [[title, specstag, price[0], condition[0], seller[0], price[1], condition[1], seller[1], price[2], condition[2], seller[2]]];
--
function getBookDetails(isbn) {
// Query the book database by ISBN code.
if (isbn !== "") {
var url = "https://api.bol.com/catalog/v4/search/?apikey=myapi6&offers=all&format=json&q=" + isbn;
var response = UrlFetchApp.fetch(url);
var results = JSON.parse(response);
if (results.totalResultSize) {
// There'll be only 1 book per ISBN
var book = results.products[0];
// get Title and Authors
var title = (results.products[0]["title"]);
var specstag = (results.products[0]["specsTag"]);
var offerdata = results.products[0]["offerData"];
if (typeof offerdata.offers !== 'undefined' && offerdata.offers.length > 0) {
var arrayLength = offerdata.offers.length;
var price = [];
var condition = [];
var seller = [];
for (var i = 0; i < arrayLength; i++) {
price[i] = offerdata.offers[i]["price"];
condition[i] = offerdata.offers[i]["condition"];
seller[i] = offerdata.offers[i]["seller"]["displayName"];
}
}
}
var resultRow = [[title, specstag, price[0], condition[0], seller[0], price[1], condition[1], seller[1], price[2], condition[2], seller[2]]];
return resultRow;
}
}

the answer
var resultRow = [];
resultRow[0] = [];
resultRow[0][0]=title;
resultRow[0][1]=specstag;
for (var i = 0; i < arrayLength; i=1+3) {
resultRow[0][3*i+2]=price[i];
resultRow[0][3*i+3]=condition[i];
resultRow[0][3*i+4]=seller[i];
}
how you should think about it is to see the index of the elements in the array and then find relation between i and the index you want
var resultRow = [
[
title, //[0][0]
specstag, //[0][1]
price[0], //[0][2]
condition[0], //[0][3]
seller[0], //[0][4]
price[1], //[0][5]
condition[1], //[0][6]
seller[1], //[0][7]
price[2], //[0][8]
condition[2], //[0][9]
seller[2]//[0][10]
]
];

You might be looking for something like this;
var data = { title: null,
spcstag: null,
pcs: [],
};
offerData.offers.forEach( p => { var pcsData = {};
!!data.title || data.title = p.title;
!!data.specstag || data.specstag = p.specstag;
pcsData.price = p.price;
pcsData.condition = p.condition;
pcsData.seller = p.seller;
data.pcs.push(pcsData);
});

Add a property to an object returned by a function?

I would like to know if there is a way to get all properties of 'myFields' assigned in a single statement ?
This works:
function fieldMap(namesString) {
var result = {};
var names = namesString.split(' ');
for (index in names) {
var name = names[index];
result[name] = name + '/text()';
}
return result;
}
var myFields = fieldMap('title rating author url');
myFields['cover']="#cover";
This doesn't work:
var myFields = fieldMap('title rating author url')['cover']='#cover';

If you want to change all properties of an object in a single statement, you have to write yourself a mapping method:
function fieldMap(namesString) { // Mike Lin's version
var result = {};
var names = namesString.split(' ');
for (var i=0; i<names.length; i++) {
var name = names[i];
result[name] = name + '/text()';
}
return result;
}
Object.prototype.map = function(callbackOrValue){
/* better create an object yourself and set its prototype instead! */
var res = {};
for(var x in this){
if(typeof this[x] === "function")
res[x] = this[x];
if(typeof callbackOrValue === "function")
res[x] = callbackOrValue.call(this[x]);
else
res[x] = callbackOrValue;
}
return res;
}
Then you can use
var myFields = fieldMap('title rating author url').map(function(){return '#cover'};
/* ... or ... */
var myFields = fieldMap('title rating author url').('#cover');
However, if you want to set myFields and change the value in the same step, try this:
var myFields;
(myFields = fieldMap('title rating author url'))['cover']='#cover';

Javascript | Objects, Arrays and functions

may be you can help me. How can I create global object and function that return object values by id?
Example:
var chat = {
data : {
friends: {}
}
}
....
/*
JSON DATA RETURNED:
{"users": [{"friend_id":"62","name":"name","username":"admin","thumb":"images/avatar/thumb_7d41870512afee28d91.jpg","status":"HI4","isonline":""},{"friend_id":"66","name":"Another name","username":"regi","thumb":"images/avatar/thumb_d3fcc14e41c3a77aa712ae54.jpg","status":"Всем привет!","isonline":"avtbsl0a6dcelkq2bd578u1qt6"},{"friend_id":"2679","name":"My name","username":"Another","thumb":"images/avatar/thumb_41effb41eb1f969230.jpg","status":"","isonline":""}]}
*/
onSuccess: function(f){
chat.data.friends = {};
for(var i=0; i< f.users.length;i++){
chat.data.friends.push(f.users[i])
}
}
How can I create a new function (It will return values by friend_id)?
get_data_by_id: function (what, friend_id) {
/*obj.what = getfrom_globalobject(chat.data.friends???)*/
}
Example of use:
var friend_name = get_data_by_id(name, 62);
var friend_username = get_data_by_id(username, 62);
var friend_avatar = get_data_by_id(thumb, 62);

Try:
get_data_by_id: function (what, friend_id) {
return chat.data.friends[friend_id][what];
}
... but use it like:
var friend_name = get_data_by_id('name', 62);
...and set up the mapping with:
for(var i=0; i< f.users.length;i++){
chat.data.friends[f.users[i].friend_id] = f.users[i];
}

You cannot .push() to an object. Objects are key => value mappings, so you need to use char.data.friends[somekey] = f.users[i];
If you really just want a list with numeric keys, make x5fastchat.data.friends an array: x5fastchat.data.friends = [];
However, since you want to be able to access the elements by friend_id, do the following:
onSuccess: function(f){
x5fastchat.data.friends = {};
for(var i=0; i< f.users.length;i++){
chat.data.friends[f.users[i].friend_id] = f.users[i]
}
}
get_data_by_id: function (what, friend_id) {
obj[what] = chat.data.friends[friend_id][what];
}
Note the obj[what] instead of your original obj.what: When writing obj.what, what is handled like a string, so it's equal to obj['what'] - but since it's a function argument you want obj[what].

Take a look at the following code. You can simply copy paste it into an HTML file and open it. click "go" and you should see the result. let me know if I did not understand you correctly. :
<script>
myObj = { "field1" : { "key1a" : "value1a" }, "field2" : "value2" }
function go()
{
findField(myObj, ["field2"])
findField(myObj, ["field1","key1a"])
}
function findField( obj, fields)
{
var myVal = obj;
for ( var i in fields )
{
myVal = myVal[fields[i]]
}
alert("your value is [" + myVal + "]");
}
</script>
<button onclick="go()">Go</button>

I would recommend using the friend objects rather than getting them by id and name.
DATA = {"users": [{"friend_id":"62","name":"name","username":"admin","thumb":"images/avatar/thumb_7d41870512afee28d91.jpg","status":"HI4","isonline":""},{"friend_id":"66","name":"Another name","username":"regi","thumb":"images/avatar/thumb_d3fcc14e41c3a77aa712ae54.jpg","status":"Всем привет!","isonline":"avtbsl0a6dcelkq2bd578u1qt6"},{"friend_id":"2679","name":"My name","username":"Another","thumb":"images/avatar/thumb_41effb41eb1f969230.jpg","status":"","isonline":""}]}
// simple data store definition
Store = {items:{}};
NewStore = function(items){
var store = Object.create(Store);
store.items = items || {};
return store
};
Store.put = function(id, item){this.items[id] = item;};
Store.get = function(id){ return this.items[id]; };
Store.remove = function(id){ delete this.items[id]; };
Store.clear = function(){ this.items = {}; };
// example
var chat = {
data : {
friends : NewStore()
}
}
// after data loaded
chat.data.friends.clear();
for( var i = 0; i < DATA.users.length; i += 1 ){
var user = DATA.users[i];
chat.data.friends.put( user.friend_id, user );
}
getFriend = function(id){ return chat.data.friends.get( id ); }
var friend = getFriend(66);
console.log(friend.name);
console.log(friend.username);
console.log(friend.thumb);