this is my json object. i need to get only all the values of packageName and assign it to an array. can any body help me with that. i can not go for using indexes since this is dynamic object.
thanks in advance.
var data = [
{
"packageName":"string",
"packageValue":"string"
},
{
"packageName":"string",
"packageValue":"string"
}
]
Use javascript map function
var packageNames = data.map(function(obj){
return obj.packageName;
})
var data=[
{
"packageName":"string1",
"packageValue":"string"
},
{
"packageName":"string2",
"packageValue":"string"
}
]
var packageNames = data.map(function(obj){
return obj.packageName;
})
console.log(packageNames)
You can use filter function and add to array only when this key exists.
var arr = [];
data.filter(getValue)
function getValue(data){
if(data[packageName]){
arr.push(data[packageName])
}
}
You can add an if statement to check the key and then push it to an array.
for(var i = 0; i< data.length; i++){
for (var property in data[i]) {
if (data[i].hasOwnProperty(property)) {
console.log(property);
console.log(data[i][property]);
}
}
}
Related
I want to add values to array. But the same values may update. for example my array is
[{"abc1":"123456"},{"abc2":"123456"}]
when is adding again is abc1. It may update. For example in normal case
[{"abc1":"123456"},{"abc2":"123456"},{"abc1":"123456"}]
But i want
[{"abc2":"123456"},{"abc1":"123456"}]
My code
var categories = [],
arrIndex = {};
addOrReplace({"abc1":"125"});
addOrReplace({"abc2":"126"});
addOrReplace({"abc1":"127"});
addOrReplace({"abc3":"129"});
function addOrReplace(object) {
var index = arrIndex[object[0]];
console.log("index:"+object[0]);
if(index === undefined) {
index = categories.length;
}
arrIndex[object[1]] = index;
categories[index] = object;
}
console.log(categories);
It not showing correct answer.
It shows
[{"abc3":"129"}]
I want
[{"abc2":"126"},{"abc1":"127"},{"abc3":"129"}]
How it possible? Please help me?
You could use Array#findIndex ans plice the object from categories if the index is found, then push the new object to categories.
function addOrReplace(object) {
var key = Object.keys(object)[0],
index = categories.findIndex(o => key in o);
if (index !== -1) {
categories.splice(index, 1);
}
categories.push(object)
}
var categories = [];
addOrReplace({ abc1: "125"});
console.log(categories);
addOrReplace({ abc2: "126"});
console.log(categories);
addOrReplace({ abc1: "127"});
console.log(categories);
addOrReplace({ abc3: "129"});
console.log(categories);
.as-console-wrapper { max-height: 100% !important; top: 0; }
var categories = new Map();
addOrReplace({"abc1":"125"});
addOrReplace({"abc2":"126"});
addOrReplace({"abc1":"127"});
addOrReplace({"abc3":"129"});
function addOrReplace(object) {
for (var name in object)
categories[name] = object;
}
console.log(categories);
var categories = [],
arrIndex = {};
addOrReplace({"abc1":"125"});
addOrReplace({"abc2":"126"});
addOrReplace({"abc1":"127"});
addOrReplace({"abc3":"129"});
function addOrReplace(object) {
for(var c in categories){
if(Object.keys(categories[c])[0] == Object.keys(object)[0]){
categories.splice(c,1)
}
}
categories.push(object)
}
console.log(categories);
//[{"abc2":"126"},{"abc1":"127"},{"abc3":"129"}]
I don't know how you would be finally using the final data but in case you are looking for the uniqueness, i would like to recommend to go for object hash instead of array.
Initially :
{
"abc1" : "123456",
"abc2" : "123456"
}
If you now add { "abc1" : "some_other_value" }.
{
"abc1" : "some_other_value",
"abc2" : "123456"
}
You can also check if the value exist already or not using if(objectHash('abc1')).
It can save you from extra traversal and would overwrite values if already present.
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
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.
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);
This is my json object i want to get alert it without the array order like[0], [1].
var jsononj = {
"objnew" :
[{testarry: "thi is my demo text" },
{testarry2: "thi is my demo text2" }
] };
}
var newtest = jsononj.objnew[0].testarry;
alert(newtest);
i want to alert without [0]. how to i achieve this
I think this is what you're looking for:
var i;
for (i = 0; i < jsonobj.objnew.length; i++) {
if (jsonobj.objnew[i].testarry) {
alert(jsonobj.objnew[i].testarry);
}
}
This is just stupid but I removed the [0]
var jsononj = {
"objnew" : [
{testarry: "thi is my demo text" },
{testarry2: "thi is my demo text2" }
]
};
var a = jsononj.objnew.shift();
alert(a.testarry);
jsononj.objnew.unshift(a);
That's not JSON, that's a Javascript object. JSON is a text format for representing data.
If you want to look for an object with a specific property, loop through the objects in the array and check for it:
var newtest = null;
for (var i = 0; i < jsononj.objnew.length; i++) {
var obj = jsononj.objnew[i];
if (obj.hasOwnProperty('testarry') {
newtest = obj.testarry;
break;
}
}
if (newtest != null) {
// found one
}
doing a var firstOne = jsononj.objnew[0];
but if you simply don't like the [0] through your lines, extend the Array prototype
Array.prototype.first = function () {
return this[0];
};
var newtest = jsononj.objnew.first().testarry;
alert(newtest);
more info at First element in array - jQuery