Develop Reference

How to overwrite a json object?

I have json object with a key named favorite, it has a value of true, when the button is pressed I want to overwrite the value of the favorite key to false and vica versa.
This is what`s inside the json object:
allPlaces: "[{"title":"Test1 ","description":"Test 2","category":"restaurant","favourite":false}]"
function favourite(element) {
var allPlaces = JSON.parse(localStorage.getItem("allPlaces"));
var placeIndex = element.getAttribute("data");
places = {allPlaces}
if (allPlaces["favourite"] == true) {
places.favourite[placeIndex] = false;
element.querySelector('ion-icon').setAttribute('name', 'star-outline');
} else {
console.log("working");
places.favourite[placeIndex] = true;
element.style.color = '#FFE234';
element.querySelector('ion-icon').setAttribute('name', 'star');
}
localStorage.setItem("allPlaces", JSON.stringify(places));
}

allPlaces is an array (in this case it has 1 item) so therefore in order to change the property of an object inside it you have to give it an index like so allPlaces[0].favorite = true
I added some code as a reference
const allPlaces = '[{"title":"Test1 ","description":"Test 2","category":"restaurant","favourite":false}]';
const places = JSON.parse(allPlaces);
places[0].favorite = true;
console.log(places[0]);

Calling Json Objects With Parameters Passed to Function

I've run into an interesting dilemma- I want to write a function which, given a couple parameters, will return an object/parameter in a JSON response based on the value of another.
Snippet 1 shows a way that I could do it with simple case checking:
function callf() {
return f("name", "project_id", "sampleName");
}
function f(Where, Return, Is) {
var options = {
"option1": "asdf",
"option2": "asdf"
}
var url = "..."
var response = UrlFetchApp.fetch(url, options);
var jsonResponse = JSON.parse(response.getContentText());
for (i in jsonResponse) {
if (Where == "object1") {
//Instead of dynamically calling the object, use case testing to call the desired object.
if (jsonResponse[i].object1 == Is) {
if (Return = "returnValue1") {
return jsonResponse[i].returnValue1;
} else if (Return = "returnValue2") {
return jsonResponse[i].returnValue2;
}
}
} else if (Where == "object2") {
if (jsonResponse[i].object2 == Is) {
if (Return = "returnValue1") {
return jsonResponse[i].returnValue1;
} else if (Return = "returnValue2") {
return jsonResponse[i].returnValue2;
}
}
}
}
However, with doing it the way above, I have to account for every possible object that the json response contains, that would be a pain. I want to find an alternative where I can simply pass the a string representing the object I want to return from a function like the snippet below:
function callf(){
return f("name","project_id","sampleName");
}
function f(Where,Return,Is){
var options = {
"option1":"asdf",
"option2":"asdf"
}
var url = "..."
var response = UrlFetchApp.fetch(url,options);
var jsonResponse = JSON.parse(response.getContentText());
for(i in jsonResponse){
if(jsonResponse[i].(Where)==Is){
return jsonResponse[i].(Return);
}
}
}
How might I accomplish this?

Just like you're accessing json with i variable as key using square brackets,
for(var i in jsonResponse){
if(jsonResponse[i][Where]==Is){
return jsonResponse[i][Return];
}
}

Refreshing a webpage is actually redirecting to bing

I have a script, in which I am adding custom URL to the browser back button
for this I used this particular script
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.cookie.js"></script>
<script type="text/javascript" src="js/native.history.js"></script>
<script type="text/javascript" src="js/go.new.js"></script>
<script>
$(window).load(function()
{
setTimeout(backtrap, 100);
if (!($.cookie("clkd"))){
$.cookie("clkd", 1, { expires : 14 , path: '/'});
}
setInterval(toggle_image, 1000);
});
window.onpageshow = function (e) {
if (e.persisted) {
location.reload();
}
};
window.onpopstate = function(event) {
if (document.location.toString().indexOf("redir=1")>0){
window.location.href = "<?=$$last_offer?>";
//window.location.href = "<?=$szLinkURL?>";
}
};
function toggle_image()
{
var height = $('#banner-img').height();
$('#banner-img').toggle();
$('#loader-img').toggle();
$('#loader-img').css({'height':height+'px'});
}
function show_star(rate,id)
{
$('#al-stars-'+id).html('<span class="stars" id="stars-'+id+'">'+parseFloat(rate)+'</span>');
$('#stars-'+id).stars();
}
$.fn.stars = function()
{
return $(this).each(function() {
$(this).html($('<span />').width(Math.max(0, (Math.min(5, parseFloat($(this).html())))) * 16));
});
}
</script>
Now the script seems to work fine, but I face a new proble, that is:
when I am clicking the refresh button on the browser, the page is rediecting to bing.com
but I dont know why this is happening...
in case if needed here's the script in the go.new.js
/**
* go.js
*
* Functions for go.php and the backtrap
*/
// --------------------------------------------------------------------------------------------------------------------
// Code for parsing query string gratefully lifted from http://unixpapa.com/js/querystring.html, with an
// addition for modifying/generating new query strings.
// Query String Parser
//
// qs= new QueryString()
// qs= new QueryString(string)
//
// Create a query string object based on the given query string. If
// no string is given, we use the one from the current page by default.
//
// qs.value(key)
//
// Return a value for the named key. If the key was not defined,
// it will return undefined. If the key was multiply defined it will
// return the last value set. If it was defined without a value, it
// will return an empty string.
//
// qs.values(key)
//
// Return an array of values for the named key. If the key was not
// defined, an empty array will be returned. If the key was multiply
// defined, the values will be given in the order they appeared on
// in the query string.
//
// qs.keys()
//
// Return an array of unique keys in the query string. The order will
// not necessarily be the same as in the original query, and repeated
// keys will only be listed once.
//
// QueryString.decode(string)
//
// This static method is an error tolerant version of the builtin
// function decodeURIComponent(), modified to also change pluses into
// spaces, so that it is suitable for query string decoding. You
// shouldn't usually need to call this yourself as the value(),
// values(), and keys() methods already decode everything they return.
//
// Note: W3C recommends that ; be accepted as an alternative to & for
// separating query string fields. To support that, simply insert a semicolon
// immediately after each ampersand in the regular expression in the first
// function below.
function QueryString(qs)
{
this.dict= {};
// If no query string was passed in use the one from the current page
if (!qs) qs= location.search;
// Delete leading question mark, if there is one
if (qs.charAt(0) == '?') qs= qs.substring(1);
// Parse it
var re= /([^=&]+)(=([^&]*))?/g;
while (match= re.exec(qs))
{
var key= decodeURIComponent(match[1].replace(/\+/g,' '));
var value= match[3] ? QueryString.decode(match[3]) : '';
if (this.dict[key])
this.dict[key].push(value);
else
this.dict[key]= [value];
}
}
QueryString.decode= function(s)
{
s= s.replace(/\+/g,' ');
s= s.replace(/%([EF][0-9A-F])%([89AB][0-9A-F])%([89AB][0-9A-F])/g,
function(code,hex1,hex2,hex3)
{
var n1= parseInt(hex1,16)-0xE0;
var n2= parseInt(hex2,16)-0x80;
if (n1 == 0 && n2 < 32) return code;
var n3= parseInt(hex3,16)-0x80;
var n= (n1<<12) + (n2<<6) + n3;
if (n > 0xFFFF) return code;
return String.fromCharCode(n);
});
s= s.replace(/%([CD][0-9A-F])%([89AB][0-9A-F])/g,
function(code,hex1,hex2)
{
var n1= parseInt(hex1,16)-0xC0;
if (n1 < 2) return code;
var n2= parseInt(hex2,16)-0x80;
return String.fromCharCode((n1<<6)+n2);
});
s= s.replace(/%([0-7][0-9A-F])/g,
function(code,hex)
{
return String.fromCharCode(parseInt(hex,16));
});
return s;
};
QueryString.prototype.value= function (key)
{
var a= this.dict[key];
return a ? a[a.length-1] : undefined;
};
QueryString.prototype.values= function (key)
{
var a= this.dict[key];
return a ? a : [];
};
QueryString.prototype.keys= function ()
{
var a= [];
for (var key in this.dict)
a.push(key);
return a;
};
QueryString.prototype.set = function(key, value)
{
this.dict[key] = [value];
};
QueryString.prototype.add = function(key, value)
{
if (typeof this.dict[key] == 'undefined') {
this.dict[key] = [value];
} else {
this.dict[key].push(value);
}
};
QueryString.prototype.toString = function()
{
var pieces = [];
for (var key in this.dict) {
for (var idx in this.dict[key]) {
pieces.push( encodeURIComponent(key) + '=' + encodeURIComponent(this.dict[key][idx]));
}
}
return pieces.join('&');
};
// --------------------------------------------------------------------------------------------------------------------
// Load ourselves into the user's history, with an altered query string. The 'bt' var tells us what step of the
// back trap we were LAST on. After that, we redirect ourselves to the next URL.
function backtrap() {
var qs = new QueryString();
qs.set('redir', 1);
var own_url = window.location.href;
var qs_at = own_url.indexOf('?');
var doped_url;
if (qs_at == -1) {
doped_url = own_url + '?' + qs.toString();
} else {
doped_url = own_url.substring(0, qs_at) + '?' + qs.toString();
}
History.pushState({}, '', doped_url);
History.pushState({} ,'', own_url);
alert(doped_url);
alert(own_url);
}
for better understanding
check this link and detect
http://gomotrak.com/main/click.php?c=2173&key=jm64njqpq608t19bgqi3fwfq&c2=AA09_00000&c3=[zone]
[NOTE]
The backbutton is working fine, there is no issue with the back-button...
Problem is, when i am clicking on the refresh button of the browser in the address bar, its reloading the bing page.
Also $$last_offer is absolutely fine cause its working this way
if(stripos($ua,'android') !== false)
{
$agent = 'a';
setlocale(LC_ALL, 'pt_BR.UTF-8');
$last_CSVfp = fopen("offer_android.csv", "r");
$last_offer_data = array();
if($last_CSVfp !== FALSE)
{
while(! feof($last_CSVfp))
{
$last_offer_data[] = fgetcsv($last_CSVfp,"",",");
}
}
fclose($last_CSVfp);
$last_arr_size = count($last_offer_data);
$last_offer = "offer".intval(intval($last_arr_size)+1);
}
so $last_offer becomes "offer3" for example
and $$last_offer becomes "$offer3" its like alias of a phpvariabledenoted by anotherphp variable`

how to change attribute text of json in jquery?

I am trying to change the property name /attr name of my json object.I try like that but nothing will change.I need to make json object after seen the input json and convert it like outjson
function changeData(data){
var title;
for(var i = 0; i < data.length; i++){
if(data[i].hasOwnProperty("displayName")){
data[i]["label"] = data[i]["displayName"];
delete data[i]["displayName"];
}
if(data[i].hasOwnProperty("displayDetail")){
data[i]["title"] = data[i]["displayDetail"];
delete data[i]["displayDetail"];
}
if(data[i].hasOwnProperty("inputType")){
if(data[i]["inputType"]=="NUMBER"){
data[i]["type"]="number"
}else if(data[i]["inputType"]=="TEXT"){
data[i]["type"]="text"
}else if(data[i]["inputType"]=="SWTICH"){
data[i]["type"]="select"
}
delete data[i]["inputType"];
}
}
console.log(data);
}

Try this - it's possibe to remove the if selection for inputType by creating a tiny lookup table from original value to new value:
function changeData(data) {
var map = { NUMBER: "number", TEXT: "text", SWITCH: "select" };
// data is an object - use for .. in to enumerate
for (var key in data.input) {
var e = data.input[key]; // alias for efficient structure dereferencing
e.label = e.displayName;
e.title = e.displayDetail;
e.type = map[e.inputType];
delete e.displayName;
delete e.displayDetail;
delete e.inputType;
}
};
There's really no need for the hasOwnProperty test these days - only use it if you think there's any risk that someone unsafely added to Object.prototype. jQuery manages without it quite happily, other modern code should do to.
If the mapping of field names was any longer I'd consider using another mapping table with another loop to remove the hard coded copy/delete pairs.

i have a nice Recursive function for that:
usage:
// replace list
var replacedObj = replaceAttrName(sourceObject, {foo: 'foooo', bar: 'baaar'});
so in your case you can easily do:
var newObj = replaceAttrName(json, {displayDetail: 'title', displayName: 'label', inputType: 'type'});
demo: http://jsfiddle.net/h1u0kq67/15/
the function is that:
function replaceAttrName(sourceObj, replaceList, destObj) {
destObj = destObj || {};
for(var prop in sourceObj) {
if(sourceObj.hasOwnProperty(prop)) {
if(typeof sourceObj[prop] === 'object') {
if(replaceList[prop]) {
var strName = replaceList[prop];
destObj[strName] = {};
replaceAttrName(sourceObj[prop], replaceList, destObj[strName]);
} else if(!replaceList[prop]) {
destObj[prop] = {};
replaceAttrName(sourceObj[prop], replaceList, destObj[prop]);
}
} else if (typeof sourceObj[prop] != 'object') {
if(replaceList[prop]) {
var strName = replaceList[prop];
destObj[strName] = sourceObj[prop];
} else if(!replaceList[prop]) {
destObj[prop] = sourceObj[prop];
}
}
}
}
return destObj;
}

If I am getting you right, you just want substitutions:
displayDetail => title
displayName => label
inputType => type.
I came up with the follwoing:
function changeData(data){
return JSON.parse(JSON.stringify(data).replace(/displayDetail/g, "title").replace(/displayName/g, "label").replace(/inputType/g, "type"));
}
Here is the Fiddle to play with.
Edit: I forgot replacements for "NUMBER", "TEXT" and "SWITCH".
function changeData(data){
return JSON.parse(JSON.stringify(data).replace(/displayDetail/g, "title").replace(/displayName/g, "label").replace(/inputType/g, "type").replace(/TEXT/g, "text").replace(/NUMBER/g, "number").replace(/SWITCH/g, "switch"));
}

Nicer way to get nested object attributes

Often in a response from a remote API call, I receive nested objects:
var response = {
data : {
users : [
{
name : 'Mr. White'
}
]
}
}
I want to check whether the first user's name is 'Mr. White', and would naturally want to write something like.
var existed = response.data.users[0].name === 'Mr. White'
However I cannot be sure if all the objects are present, so to avoid exceptions instead I end up writing:
var existed = response && response.data && response.data.users && response.data.users[0].name === 'Mr. White'
Is there a nicer way to do this? Another ugly option that comes to mind is:
var existed = false;
try {
var existed = response.data.users[0].name === 'Mr. White';
} catch(e) { }
In addition to vanilla javascript, I usually have underscore.js and jquery available too.
Edit:
Oops, noticed I asked a dupe of javascript test for existence of nested object key.
An interesting option based on those answers is:
var existed = (((response || {}).data || {}).users || [{}])[0].name === 'Mr. White';

You could hide this naughty try/catch block inside a function like this one :
function resolve(root, path){
try {
return (new Function(
'root', 'return root.' + path + ';'
))(root);
} catch (e) {}
}
var tree = { level1: [{ key: 'value' }] };
resolve(tree, 'level1[0].key'); // "value"
resolve(tree, 'level1[1].key'); // undefined
More on this : https://stackoverflow.com/a/18381564/1636522

I would use the try catch approach but wrap it in a function to hide the ugliness.

Instead of a try/catch, this should be done via checking whether each level in the object is defined or not.
go for
if(typeof(response)!="undefined"
&& typeof(response.data)!="undefined"
&& typeof(response.data.users)!="undefined"
&& typeof(response.data.users[0])!="undefined"
&& typeof(response.data.users[0].name)!="undefined"
) {
//executes only if response.data.users[0].name is existing
}

Here is a function which I used in one of my projects http://jsfiddle.net/JBBAJ/
var object = {
data: {
users: [
{
firstName: "White"
},
{
firstName: "Black"
}
]
}
}
var read = function(path, obj) {
var path = path.split(".");
var item = path.shift();
if(item.indexOf("]") == item.length-1) {
// array
item = item.split("[");
var arrayName = item.shift();
var arrayIndex = parseInt(item.shift().replace("]", ""));
var arr = obj[arrayName || ""];
if(arr && arr[arrayIndex]) {
return read(path.join("."), arr[arrayIndex]);
} else {
return null;
}
} else {
// object
if(obj[item]) {
if(path.length === 0) {
return obj[item];
} else {
return read(path.join("."), obj[item]);
}
} else {
return null;
}
}
}
console.log(read("data.users[0].firstName", object)); // White
console.log(read("data.users[1].firstName", object)); // Black
console.log(read("data.test.users[0]", object)); // null
The idea is to pass your path as a string along with your object. The idea was to prevent the throwing of an exception and receive just null as result of the path is wrong. The good thing is that the function works with every path and you don't need to write long if statements.