So i have this JSON:
{
"id_u":"1",
"nombre_usuario":"JESUS",
"apellido_paterno_usuario":"DIAZ"
}
I just want to access to the fields names
id_u,_nombre_usuario,apellido_paterno_usuario
And then, create an array with that info.
How can i do that?
Thanks guys
Do this way :
var keyValuePair = {
"id_u":"1",
"nombre_usuario":"JESUS",
"apellido_paterno_usuario":"DIAZ"
};
var arr =new Array();
for (key in keyValuePair){
arr.push(key); // for keys
// arr.push(keyValuePair[key]); // for values
}
Use .each() to parse JSON.
Try this:
var keyArray = [];
var a = {
"id_u":"1",
"nombre_usuario":"JESUS",
"apellido_paterno_usuario":"DIAZ"
};
$.each(a,function(i,v){
keyArray.push(i); // i is json key and v is json value.
});
console.log(keyArray);
DEMO
Object.keys(jsonObject) is enough.
Related
I have JSON stringify data like this :
[{"availability_id":"109465","date":"2017-02-21","price":"430000"},{"availability_id":"109466","date":"2017-02-22","price":"430000"},{"availability_id":"109467","date":"2017-02-23","price":"430000"}]
I want to get only price value of that data. I have tried this way but it doesn't work.
var stringify = JSON.stringify(values);
for(var i = 0; i < stringify.length; i++)
{
alert(stringify[i]['price']);
}
How could I to do that ?
This code will only fetch the price details.
var obj = '[{"availability_id":"109465","date":"2017-02-21","price":"430000"},{"availability_id":"109466","date":"2017-02-22","price":"430000"},{"availability_id":"109467","date":"2017-02-23","price":"430000"}]';
var stringify = JSON.parse(obj);
for (var i = 0; i < stringify.length; i++) {
console.log(stringify[i]['price']);
}
Observation :
If you want to parse the array of objects to get the property value you have to convert in into JSON object first.
DEMO
var jsonStringify = '[{"availability_id":"109465","date":"2017-02-21","price":"430000"},{"availability_id":"109466","date":"2017-02-22","price":"430000"},{"availability_id":"109467","date":"2017-02-23","price":"430000"}]';
var jsonObj = JSON.parse(jsonStringify);
for(var i = 0; i < jsonObj.length; i++)
{
alert(jsonObj[i]['price']);
}
you will geting a stringified object like this
var obj='[{"availability_id":"109465","date":"2017-02-21","price":"430000"},
{"availability_id":"109466","date":"2017-02-22","price":"430000"},
{"availability_id":"109467","date":"2017-02-23","price":"430000"}]';
parse your obj using JSON.parse(object)
then apply this loop ad let me know it get any error
lie this
var parseObject = JSON.parse(object);
instead of using stringify before selecting the data you should use your loop directly on the values array.
For example :
var priceArray = array();
values.forEach (data) {
alert(data['price'];
priceArray.push(data['price']);
}
stringify = JSON.stringify(values);
stringifiedPriceArray = JsON.stringify(priceArray);
Once stringified, you can't reach the data in your array
I receive the following string from the server response：
var jsonData = '[{"firstName":"Bill","lastName":"Gates"},{"firstName":"George","lastName":"Bush"},{"firstName":"Thomas","lastName":"Carter"}]';
I see some jquery plugins can predefine the keys they want
like: index:"firstName", and they get a ul like
<li>Bill</li>
<li>George</li>
<li>Thomas</li>
If index:"lastName", they get a ul like
<li>Gates</li>
<li>Bush</li>
<li>Carter</li>
The only way I know how to parse a json format string is:
var object = JSON.parse(jsonData);
var firstName = object[i].firstName;
var lastName= object[i].lastName;
The plugin pass the index like a parameter
function f(index) {
return object[i].index;
}
How can they achieve this？
Thanks for helping!
You can access object properties with square brackets. JS objects work like arrays in this regard.
var objects = JSON.parse(jsonData),
key = "firstName";
objects.forEach(function (obj) {
var value = obj[key];
// ...
});
Convert Array-String to Object with Javascript or jQuery
here is my array
data=["{X:7,Y:12.5}", "{X:8,Y:15}", "{X:9,Y:12.5}"]
expected output is object
data=[{X:7,Y:12.5},{X:8,Y:15},{X:9,Y:12.5}]
how to do that?
You can try something like this:
var data=["{X:7,Y:12.5}", "{X:8,Y:15}", "{X:9,Y:12.5}"];
data = data.map(function(item){
item = item.replace(/{/g, "{\"");
item = item.replace(/}/g, "\"}");
item = item.replace(/:/g, "\":\"");
item = item.replace(/,/g, "\",\"");
return JSON.parse(item);
})
console.log(data)
Try this:
data = ["{X:7,Y:12.5}", "{X:8,Y:15}", "{X:9,Y:12.5}"];
data = data.join(',');
data = data.replace(/X/g,'"X"');
data = data.replace(/Y/g,'"Y"');
data = JSON.parse("["+data+"]");
Just convert array to string and do clean up that can be parsed to json.
Simple solution is to replace the X and Y with "X" & "Y". In order to create a string key that can be parse as JSON.
data=["{X:7,Y:12.5}", "{X:8,Y:15}", "{X:9,Y:12.5}"]
for(var i in data){
tmp = data[i].replace("X",'"X"').replace('Y','"Y"')
data[i] = JSON.parse(tmp)
}
Enjoy.
var reg = /[^{,]+?(?=:)/g;
var data = ["{X:7,Y:12.5}", "{X:8,Y:15}", "{X:9,Y:12.5}"];
data = data.map(function(item){
return JSON.parse(item.replace(reg, "\"$&\""));
});
I have a json encoded array like this:
{
"ar0":"{\"start\":{\"lat\":22.9939202,\"lng\":72.50009499999999},\"end\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"waypoints\":[[23.0316834,72.4779436]]}",
"ar1":"{\"start\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"end\":{\"lat\":23.0420584,\"lng\":72.67145549999998},\"waypoints\":[[23.02237,72.6500747]]}",
"ar2":"{\"start\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"end\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"waypoints\":[[23.0016629,72.58898380000005]]}"
}
my quetion is :
(1) How to find length of this array? //here it is 3
(2) How to use it's value?
//for example:for as0 the value is {\"start\":{\"lat\":22.9939202,\"lng\":72.50009499999999},\"end\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"waypoints\":[[23.0316834,72.4779436]]}
javascript code where i use upper things :
function setroute(os)
{
var wp = [];
for(var i=0;i<os.waypoints.length;i++)
wp[i] = {'location': new google.maps.LatLng(os.waypoints[i][0], os.waypoints[i][1]),'stopover':false }
ser.route({'origin':new google.maps.LatLng(os.start.lat,os.start.lng),
'destination':new google.maps.LatLng(os.end.lat,os.end.lng),
'waypoints': wp,
'travelMode': google.maps.DirectionsTravelMode.DRIVING},function(res,sts) {
if(sts=='OK')ren.setDirections(res);
})
}
function fetchdata()
{
var jax = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
jax.open('POST','process.php');
jax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
jax.send('command=fetch')
jax.onreadystatechange = function(){ if(jax.readyState==4) {
alert(JSON.parse(jax.responseText).ar0);
try {
console.log(jax.responseText);
//it is not work
for(var i=0;i<JSON.parse(jax.responseText).length;i++)
{
setroute( eval('(' + jax.responseText + ')') );
}
}
catch(e){ alert(e); }
}}
}
Your JSON is not an array, but an object. If you want it to be an array, it should be something like this:
[
"{\"start\":{\"lat\":22.9939202,\"lng\":72.50009499999999},\"end\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"waypoints\":[[23.0316834,72.4779436]]}",
"{\"start\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"end\":{\"lat\":23.0420584,\"lng\":72.67145549999998},\"waypoints\":[[23.02237,72.6500747]]}",
"{\"start\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"end\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"waypoints\":[[23.0016629,72.58898380000005]]}"
]
Then, you can get a javascript array as follows:
var array = JSON.parse(jax.responseText);
And access values as follows:
array[0]
array.length
EDIT: In order to have a real JSON array with the PHP json_encode method, see this related question.
With this modification you will be able to use all the possibilities of JS array without workaround.
Objects in JavaScript don't have a .length property like Arrays do.
In ES5 you can do: Object.keys({}).length; // 0
The other solution would be to loop over all the properties of your object with a for .. in loop and count.
You can use the following code. It will produce your desired output 3
var test = {
"ar0":"{\"start\":{\"lat\":22.9939202,\"lng\":72.50009499999999},\"end\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"waypoints\":[[23.0316834,72.4779436]]}",
"ar1":"{\"start\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"end\":{\"lat\":23.0420584,\"lng\":72.67145549999998},\"waypoints\":[[23.02237,72.6500747]]}",
"ar2":"{\"start\":{\"lat\":23.0394491,\"lng\":72.51248850000002},\"end\":{\"lat\":22.9999061,\"lng\":72.65318300000001},\"waypoints\":[[23.0016629,72.58898380000005]]}"
}
var getLength = function(obj) {
var i = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)){
i++;
}
}
return i;
};
console.log(getLength(test));
For your first question, you should use Object.keys(item).length
To get the values of your object, you should iterate over it with a for loop:
for(var key in item)
{
var val = item[key];
}
var count = 0;
Object.keys(json).forEach(function (key) {
count++;
alert(json[key].start.lat);
});
alert(count);
Using jQuery
$(json).each(function() { count++; alert(this.start.lat); });
alert(count);
I have a json object of this type:
jsonObject={visits:'3',
v1:{'timestamp':'1231313.311',
'time_year':'2011',
'time_month':'Jan',
'time_date':'15'
'X_value':'X'
},
v2:{'timestamp':'1231313.311',
'time_year':'2011',
'time_month':'Jan',
'time_date':'15'
'X_value':'Y'
},
v3:{'timestamp':'534224242.311',
'time_year':'2011',
'time_month':'Feb',
'time_date':'5',
'X_value':'Z'
}
}
Now i want to convert this into a format like...
JsonObject={'2011':{'Jan':{'15':['X','Y']
},
'Feb':{'5':'Z'
},
}
}
How can i do that...I ve tried iterating over the first JSONObject and taking out year,month,and date values but i am not able to create a new JSONObject from that data.
Thanks in advance.
If you've tried iterating the original object, you're probably not far from done. You just need to create the new object:
var newObject = {};
for(var key in jsonObject) {
if(key == 'visits')
continue;
var year = jsonObject[key]['time_year'];
var month = jsonObject[key]['time_month'];
var date = jsonObject[key]['time_date'];
if(!(year in newObject))
newObject[year] = {};
if(!(month in newObject[year]))
newObject[year][month] = {};
if(!(date in newObject[year][month]))
newObject[year][month][date] = [];
newObject[year][month][date].push(jsonObject[key]['X_value']);
}
JSFiddle demo, outputs into your browser console log.