Develop Reference

Convert to CSV in a downloadable format

I want to convert an array of objects into CSV.
Please have a look at the code. What I am doing wrong? I am getting an array when I console.log("csv",array) which is passed from printAccountsGa. Moreover, I have declared JSONGA = [] globally but still I get array with every object on consoling. But when I pass that to csvConverter function it displays undefined.
function printAccountsGa(results) {
if (results && !results.error) {
var accounts = results.items;
for (var i = 0, account; account = accounts[i]; i++) {
//console.log('Account Id: ' + account.id);
listProperties(account.id);
//console.log('Account Name: ' + account.name);
}
console.log(JSONGA);
csvConverter(JSONGA);
}
}
function printAccountsGtm(results) {
console.log("result is",results);
if (results && !results.error) {
var accounts = results.accounts;
console.log(accounts);
for (var i = 0, account; account = accounts[i]; i++) {
//console.log('Account Id: ' + account.accountId);
listContainers(account.accountId);
//console.log('Account Name: ' + account.name);
}
}
}
function listProperties(accountID){
var request = gapi.client.analytics.management.webproperties.list({
'accountId': accountID
});
request.execute(printProperties);
}
function printProperties(results){
if (results && !results.error) {
var properties = results.items;
//console.log(properties[0].accountId);
$.each(properties,function(element){
//console.log(properties[element].accountId);
var tempObj={};
tempObj={
'AccountID':properties[element].accountId,
'PropertyID':properties[element].id,
'name':properties[element].name,
}
JSONGA.push(tempObj);
})
}
}
function csvConverter(array){
console.log("csv",array);
var result = array.map(function(d){
return JSON.stringify(values(d));
})
.join('\n')
.replace(/(^\[)|(\]$)/mg, '');
window.open('data:text/csv;charset=utf-8,' + escape(result));
}
window.onload = function(){
var el = document.getElementById('auth-button-ga');
el.addEventListener('click', authorizeGa);
var elt = document.getElementById("auth-button-gtm");
elt.addEventListener('click', authorizeGtm);
}

Tridimensional array solution javascript

I am reading information from a database and I want the following structure: continent->Country->City. I am getting the data throughout PHP. I want to store that data in a tridimensional javascript array (or atleast that is what i am trying to do since yesterday).
I don't know if the following is posible:
var triArray[0] = ["Africa"];
var triArray[0][0] = ["Niger"];
var triArray[0][0][0] = ["Abuya"];
The idea is to make those arrays through PHP and use the data to fill them.
I "need" (I think, I am not and expert) a tridimensional to then see which city belongs to which country and where that country is located, using a for loop.
<ul
<li>Africa
<ul>
<li>Niger
<ul>
<li>Abuya</li>
</ul>
<li>
</ul>
</li>
</ul>
I don't know if you get what I want, thanks in advance.

Consider a more object-oriented approach - this should be easy, since continents/countries/cities are things.
function Continent(name) {
this.name = name;
this.countries = [];
}
Continent.prototype.addCountry = function(country) {
if( !(country instanceof Country)) throw new Error("Not a country");
this.countries.push(country);
// may want to add logic for duplicate checking
}
You can build function Country and function City in a similar way.
Now that that's done, and you've built your structure, you can output it. Maybe something like:
Continent.prototype.toString = function() {
var list = "<li>" + this.name,
l = this.countries.length, i;
if( l > 0) {
list += "<ul>";
for( i=0; i<l; i++) {
list += this.countries[i]; // toString implicitly called
}
list += "</ul>";
}
list += "</li>";
return list;
}
Add similar functions to Country and City.
Now you can output the continent, say in someULelement.innerHTML, and it will render as desired.
You may want to have a function World to act as an overall container.
Object-oriented code can make tasks like this much easier to understand visually.
// ------------------ BEGIN CLASS DEFINITIONS ---------------------
function World() {
this.continents = [];
}
World.prototype.addContinent = function(continent) {
if (!(continent instanceof Continent)) throw new Error("Not a continent");
this.continents.push(continent);
}
World.prototype.toString = function() {
var list = "<ul>",
l = this.continents.length,
i;
if (l > 0) {
for (i = 0; i < l; i++) {
list += this.continents[i]; // toString implicitly called
}
}
list += "</ul>";
return list;
}
function Continent(name) {
this.name = name;
this.countries = [];
}
Continent.prototype.addCountry = function(country) {
if (!(country instanceof Country)) throw new Error("Not a country");
this.countries.push(country);
// may want to add logic for duplicate checking
}
Continent.prototype.toString = function() {
var list = "<li>" + this.name,
l = this.countries.length,
i;
if (l > 0) {
list += "<ul>";
for (i = 0; i < l; i++) {
list += this.countries[i]; // toString implicitly called
}
list += "</ul>";
}
list += "</li>";
return list;
}
function Country(name) {
this.name = name;
this.cities = [];
}
Country.prototype.addCity = function(city) {
if (!(city instanceof City)) throw new Error("Not a city");
this.cities.push(city);
}
Country.prototype.toString = function() {
var list = "<li>" + this.name,
l = this.cities.length,
i;
if (l > 0) {
list += "<ul>";
for (i = 0; i < l; i++) {
list += this.cities[i]; // toString implicitly called
}
list += "</ul>";
}
list += "</li>";
return list;
}
function City(name) {
this.name = name;
}
City.prototype.toString = function() {
return "<li>" + this.name + "</li>";
}
// ------------------ END CLASS DEFINITIONS ---------------------
var world = new World(),
africa = new Continent('Africa'),
niger = new Country('Niger'),
abuya = new City('Abuya');
world.addContinent(africa);
africa.addCountry(niger);
niger.addCity(abuya);
document.body.innerHTML = world;

This is not possible, if triArray[0] is a string it can't be an array of strings.
You should go for a structure like this :
{
continents : [
{
name:"Africa",
countries : [
{
name : "Niger",
cities : [
"Abuya" , "", ...
]
},
...
]
},
...
]
}
And you could access it like this :
var continents = data["continents"];
for (var i =0,len = continents.length; i<len;i++){
var continentData = continents[i];
var continentName = continentData["name"];
var listCountries = continentData["countries"];
for (var y =0,leny = listCountries.length; y<leny;y++){
var countryData = listCountries[y];
var countryName = countryData["name"];
// List of cities
var cities = countryData["cities"];
}
}
Edit:
added for informations, this is possible but imply some javascript knowledges and its string representation would be different than a simple array:
var world = [];
world.name = "world";
world.push([])
world[0].name = "Africa";
world[0].push([]);
world[0][0].name = "Niger";
world[0][0].push("Abuya");
document.write(world[0].name);
document.write(world[0][0].name);
document.write(world[0][0][0]);

Filtering an array of Objects in javascript

I'm really new to JS, and I'm now stuck on a task, hope someone can guide me through it.
I have an Array of Objects, like this one:
var labels = [
// labels for pag 1
{pageID:1, labels: [
{labelID:0, content:[{lang:'eng', text:'Txt1 Eng'}, {lang:'de', text:'Txt1 De:'}]},
{labelID:1, content:[{lang:'eng', text:'Txt 2 Eng:'}, {lang:'de', text:'Txt2 De:'}]},
{labelID:2, content:[{lang:'eng', text:'Txt 3 Eng:'},{lang:'de', text:'Txt 3 De:'}]}
]},
// labels for pag 2
{pageID:2, labels: [
{labelID:0, content:[{lang:'eng', text:'Txt1 Eng'}, {lang:'de', text:'Txt1 De:'}]},
{labelID:1, content:[{lang:'eng', text:'Txt 2 Eng:'}, {lang:'de', text:'Txt2 De:'}]},
{labelID:2, content:[{lang:'eng', text:'Txt 3 Eng:'},{lang:'de', text:'Txt 3 De:'}]}
]}
]
What I am trying to do is write a function to return me an array of labels (Objects) for a specific page and a specific lang. By calling this function specifying pageID 1 and lang eng, I'm basically trying to build an array like this one:
var desideredArray = [
{labelID:0, text:'Txt1 Eng'},
{labelID:1, text:'Txt1 Eng'},
{labelID:2, text:'Txt2 Eng'}
]
Now, I'm trying to write the function to retrieve/build the new array:
this.getLabelsForPageAndLang = function (numPage, lang) {
// this part filters the main object and selects the object with pageID == numPage
var result = labels.filter(function( obj ) {
return obj.pageID == numPage;
});
var tempResult = result[0].labels;
var desiredResults = []; // here I want to store the new objects
for (var i=0; i<tempResult.length; i++) {
var simpleLabelObject = {};
simpleLabelObject.labelID = tempResult[i].labelID;
// simpleLabelObject.text = ?????
results[i] = simpleLabelObject;
}
console.log (results);
};
...but how can I access the right value (the one corresponding the lang selected) in the content property?

You can use the same technique as the one used to keep the matching page: the filter method.
this.getLabelsForPageAndLang = function (numPage, lang) {
// this part filters the main object and selects the object with pageID == numPage
var result = labels.filter(function( obj ) {
return obj.pageID == numPage;
});
var contentFilter = function(obj){ return obj.lang === lang};
var tempResult = result[0].labels;
var desiredResults = []; // here I want to store the new objects
for (var i=0; i<tempResult.length; i++) {
var simpleLabelObject = {};
simpleLabelObject.labelID = tempResult[i].labelID;
var matching = tempResult[i].content.filter(contentFilter);
simpleLabelObject.text = matching[0].text;
desiredResults[i] = simpleLabelObject;
}
console.log (desiredResults);
};
I didn't do bound checks because in your code you assumed there is always a matching element, but it would probably be wise to do it.
And if you want to avoid creating two closures each time the function is called, you can prototype an object for that:
var Filter = function(numPage, lang) {
this.numPage = numPage;
this.lang = lang;
};
Filter.prototype.filterPage = function(obj) {
return obj.pageID === this.numPage;
}
Filter.prototype.filterLang = function(obj) {
return obj.lang === this.lang;
}
Filter.prototype.filterLabels = function(labels) {
var result = labels.filter(this.filterPage, this);
var tempResult = result[0].labels;
var desiredResults = []; // here I want to store the new objects
for (var i=0; i<tempResult.length; i++) {
var simpleLabelObject = {};
simpleLabelObject.labelID = tempResult[i].labelID;
var matching = tempResult[i].content.filter(this.filterLang, this);
simpleLabelObject.text = matching[0].text;
desiredResults[i] = simpleLabelObject;
}
return desiredResults;
}
console.log(new Filter(1, "eng").filterLabels(labels));

Just filter again:
var getLabelsForPageAndLang = function (numPage, lang) {
// this part filters the main object and selects the object with pageID == numPage
var result = labels.filter(function (obj) {
return obj.pageID == numPage;
});
var tempResult = result[0].labels;
var desiredResults = []; // here I want to store the new objects
for (var i = 0; i < tempResult.length; i++) {
var simpleLabelObject = {};
simpleLabelObject.labelID = tempResult[i].labelID;
var lg = tempResult[i].content.filter(function (lg) {
return lg.lang == lang;
});
simpleLabelObject.text = lg[0].text;
desiredResults.push(simpleLabelObject);
}
console.log(desiredResults);
};
http://jsfiddle.net/9q5zF/

A rather 'safe' implementation for cases when pages have the same pageID and multiple contents with the same lang:
this.getLabelsForPageAndLang = function(numPage, lang) {
var result = [];
var pages = labels.filter(function( obj ) {
return obj.pageID === numPage;
});
for (var p = pages.length - 1; p >= 0; p--) {
var page = pages[p];
for(var i = page.labels.length - 1; i >= 0; i--) {
var labelId = page.labels[i].labelID;
for (var j = page.labels[i].content.length - 1; j >= 0; j--){
if (page.labels[i].content[j].lang === lang) {
result.push({labelID: labelId, test: page.labels[i].content[j].text});
}
}
}
}
console.log(result);
}
Fiddle: http://jsfiddle.net/6VQUm/

How to dynamically access nested Json object

I am trying to populate my input fields based on the retrieved JSON object. The field names in my form would be something like:
fullName
account.enabled
country.XXX.XXXX
The function should return something like below for the above fields
aData["fullName"]
aData["account"]["enabled"]
aData["country"]["XXX"]["XXXX"]
How should I write my a function that returns a matching JSON entry for a given HTML field's name ?

you could use the attached method that will recursively look for a given path in a JSON object and will fallback to default value (def) if there is no match.
var get = function (model, path, def) {
path = path || '';
model = model || {};
def = typeof def === 'undefined' ? '' : def;
var parts = path.split('.');
if (parts.length > 1 && typeof model[parts[0]] === 'object') {
return get(model[parts[0]], parts.splice(1).join('.'), def);
} else {
return model[parts[0]] || def;
}
}
and you can call it like that :
get(aData, 'country.XXX.XXXX', ''); //traverse the json object to get the given key

Iterate over the form elements, grab their names, split on '.', then access the JSON Object?
Something like:
var getDataValueForField = function (fieldName, data) {
var namespaces = fieldName.split('.');
var value = "";
var step = data;
for (var i = 0; i < namespaces.length; i++) {
if (data.hasOwnProperty(namespaces[i])) {
step = step[namespaces[i]];
value = step;
} else {
return (""); // safe value
}
}
return (value);
};
var populateFormFields = function (formId, data) {
var fields = document.querySelectorAll('#' + formId + ' input');
for (var i = 0; i < fields.length; i++) {
fields[i].value = getDataValueForField(fields[i].name, data);
}
};
populateFormFields('myForm', fetchedFromSomeWhere());

Serialize JavaScript object into JSON string

I have this JavaScript prototype:
Utils.MyClass1 = function(id, member) {
this.id = id;
this.member = member;
}
and I create a new object:
var myobject = new MyClass1("5678999", "text");
If I do:
console.log(JSON.stringify(myobject));
the result is:
{"id":"5678999", "member":"text"}
but I need for the type of the objects to be included in the JSON string, like this:
"MyClass1": { "id":"5678999", "member":"text"}
Is there a fast way to do this using a framework or something? Or do I need to implement a toJson() method in the class and do it manually?

var myobject = new MyClass1("5678999", "text");
var dto = { MyClass1: myobject };
console.log(JSON.stringify(dto));
EDIT:
JSON.stringify will stringify all 'properties' of your class. If you want to persist only some of them, you can specify them individually like this:
var dto = { MyClass1: {
property1: myobject.property1,
property2: myobject.property2
}};

It's just JSON? You can stringify() JSON:
var obj = {
cons: [[String, 'some', 'somemore']],
func: function(param, param2){
param2.some = 'bla';
}
};
var text = JSON.stringify(obj);
And parse back to JSON again with parse():
var myVar = JSON.parse(text);
If you have functions in the object, use this to serialize:
function objToString(obj, ndeep) {
switch(typeof obj){
case "string": return '"'+obj+'"';
case "function": return obj.name || obj.toString();
case "object":
var indent = Array(ndeep||1).join('\t'), isArray = Array.isArray(obj);
return ('{['[+isArray] + Object.keys(obj).map(function(key){
return '\n\t' + indent +(isArray?'': key + ': ' )+ objToString(obj[key], (ndeep||1)+1);
}).join(',') + '\n' + indent + '}]'[+isArray]).replace(/[\s\t\n]+(?=(?:[^\'"]*[\'"][^\'"]*[\'"])*[^\'"]*$)/g,'');
default: return obj.toString();
}
}
Examples:
Serialize:
var text = objToString(obj); //To Serialize Object
Result:
"{cons:[[String,"some","somemore"]],func:function(param,param2){param2.some='bla';}}"
Deserialize:
Var myObj = eval('('+text+')');//To UnSerialize
Result:
Object {cons: Array[1], func: function, spoof: function}

Well, the type of an element is not standardly serialized, so you should add it manually. For example
var myobject = new MyClass1("5678999", "text");
var toJSONobject = { objectType: myobject.constructor, objectProperties: myobject };
console.log(JSON.stringify(toJSONobject));
Good luck!
edit: changed typeof to the correct .constructor. See https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/constructor for more information on the constructor property for Objects.

This might be useful.
http://nanodeath.github.com/HydrateJS/
https://github.com/nanodeath/HydrateJS
Use hydrate.stringify to serialize the object and hydrate.parse to deserialize.

You can use a named function on the constructor.
MyClass1 = function foo(id, member) {
this.id = id;
this.member = member;
}
var myobject = new MyClass1("5678999", "text");
console.log( myobject.constructor );
//function foo(id, member) {
// this.id = id;
// this.member = member;
//}
You could use a regex to parse out 'foo' from myobject.constructor and use that to get the name.

Below is another way by which we can JSON data with JSON.stringify() function
var Utils = {};
Utils.MyClass1 = function (id, member) {
this.id = id;
this.member = member;
}
var myobject = { MyClass1: new Utils.MyClass1("5678999", "text") };
alert(JSON.stringify(myobject));

function ArrayToObject( arr ) {
var obj = {};
for (var i = 0; i < arr.length; ++i){
var name = arr[i].name;
var value = arr[i].value;
obj[name] = arr[i].value;
}
return obj;
}
var form_data = $('#my_form').serializeArray();
form_data = ArrayToObject( form_data );
form_data.action = event.target.id;
form_data.target = event.target.dataset.event;
console.log( form_data );
$.post("/api/v1/control/", form_data, function( response ){
console.log(response);
}).done(function( response ) {
$('#message_box').html('SUCCESS');
})
.fail(function( ) { $('#message_box').html('FAIL'); })
.always(function( ) { /*$('#message_box').html('SUCCESS');*/ });

I was having some issues using the above solutions with an "associative array" type object. These solutions seem to preserve the values, but they do not preserve the actual names of the objects that those values are associated with, which can cause some issues. So I put together the following functions which I am using instead:
function flattenAssocArr(object) {
if(typeof object == "object") {
var keys = [];
keys[0] = "ASSOCARR";
keys.push(...Object.keys(object));
var outArr = [];
outArr[0] = keys;
for(var i = 1; i < keys.length; i++) {
outArr[i] = flattenAssocArr(object[keys[i]])
}
return outArr;
} else {
return object;
}
}
function expandAssocArr(object) {
if(typeof object !== "object")
return object;
var keys = object[0];
var newObj = new Object();
if(keys[0] === "ASSOCARR") {
for(var i = 1; i < keys.length; i++) {
newObj[keys[i]] = expandAssocArr(object[i])
}
}
return newObj;
}
Note that these can't be used with any arbitrary object -- basically it creates a new array, stores the keys as element 0, with the data following it. So if you try to load an array that isn't created with these functions having element 0 as a key list, the results might be...interesting :)
I'm using it like this:
var objAsString = JSON.stringify(flattenAssocArr(globalDataset));
var strAsObject = expandAssocArr(JSON.parse(objAsString));