We Keep Coding

I have a JSON file with data property which contains objects that contain information about champions. How to get champion with specific KEY property?

I have a huge static JSON file that contains all champions in a certain game and some information about them. Currently, I need to figure out how to find the champion object whose "key" property is 266. Sadly I'm having some difficulty figuring out how to get that object. I assume I have to loop through the objects, however, usually when I loop through something, it's an array but this is not the case.
I've put a simplified example of the json structure below. I have an integer 266 and now I need to somehow access the object with "key": "266" which would be Aatrox. Any clues on how would I do that?
"data": {
"Aatrox": {
"version": "8.19.1",
"id": "Aatrox",
"key": "266",
"name": "Aatrox",
"title": "the Darkin Blade"
},
"Ahri": {
"version": "8.19.1",
"id": "Ahri",
"key": "103",
"name": "Ahri",
"title": "the Nine-Tailed Fox"
}
}

You can use find
Get the entries from data key using Object.entries
Find value whose key property is equal to our desired key using find
let obj = {"data": {"Aatrox": {"version": "8.19.1","id": "Aatrox","key": "266","name": "Aatrox","title": "the Darkin Blade"},"Ahri": {"version": "8.19.1","id": "Ahri","key": "103","name": "Ahri","title": "the Nine-Tailed Fox"}}}
let findByKey = (matchKey) => Object.entries(obj.data).find(([key,value]) => value.key === matchKey)
console.log(findByKey('266'))

Here's a generic function you can use to search for any key and value:
const obj = {"data": {"Aatrox": {"version": "8.19.1","id": "Aatrox","key": "266","name": "Aatrox","title": "the Darkin Blade"},"Ahri": {"version": "8.19.1","id": "Ahri","key": "103","name": "Ahri","title": "the Nine-Tailed Fox"}}}
const searchKeyValue = {key:"key", value:"266"}
const search = data => skv => Object.entries(data).filter(([key,value])=>value[skv.key]===skv.value)
console.log(search(obj.data)(searchKeyValue))
So you can find via e.g. searchKeyValue = {key:"id", value:"Ahri"} or whatever you like.

You could also use JSONPath i.e.
$..data[?(#.key==266)]
Assuming :
{"data": {
"Aatrox": {
"version": "8.19.1",
"id": "Aatrox",
"key": "266",
"name": "Aatrox",
"title": "the Darkin Blade"
},
"Ahri": {
"version": "8.19.1",
"id": "Ahri",
"key": "103",
"name": "Ahri",
"title": "the Nine-Tailed Fox"
}
}
}

Extract information from json

So I have the following object from my controller, which has a name, a list of beans and a list of operations:
{
"name": "Charge",
"beans": [
],
"operations": [
{
"name": "getSize",
"returnType": "java.lang.Integer",
"description": "empty description",
"parameters": [
]
},
{
"name": "truncate",
"returnType": "java.lang.Void",
"description": "empty description",
"parameters": [
]
},
{
"name": "count",
"returnType": "java.lang.Integer",
"description": "empty description",
"parameters": [
{
"name": "javaCode",
"type": "java.lang.String",
"value": null
}
]
},
{
"name": "update",
"returnType": "java.lang.Integer",
"description": "empty description",
"parameters": [
{
"name": "javaSelectCode",
"type": "java.lang.String",
"value": null
},
{
"name": "javaUpdateCode",
"type": "java.lang.String",
"value": null
}
]
},
{
"name": "delete",
"returnType": "java.lang.Integer",
"description": "empty description",
"parameters": [
{
"name": "javaCode",
"type": "java.lang.String",
"value": null
}
]
},
{
"name": "dump",
"returnType": "java.lang.Void",
"description": "empty description",
"parameters": [
{
"name": "javaSelectCode",
"type": "java.lang.String",
"value": null
},
{
"name": "destinationPath",
"type": "java.lang.String",
"value": null
}
]
},
{
"name": "select",
"returnType": "java.lang.String",
"description": "empty description",
"parameters": [
{
"name": "javaCode",
"type": "java.lang.String",
"value": null
}
]
}
],
"$$hashKey": "object:620"
}
Basically I want to display all the operations from this object in a dropdown menu.
So I was thinking of having something like:
<div ng-repeat="operation in object.operations">
{{operation.name}}
</div>
Except the code above doesn't display anything on the screen, no errors in the console, nothing.
Any help would be much appreciated!
EDIT:
Javascript service:
app.controller('selectAll', ['$http', '$scope' , '$rootScope', function ($http, $scope, $rootScope) {
$scope.response;
$scope.operations;
$rootScope.$on("invokeSelectAll", function(){
$scope.invokeSelectAll();
});
$scope.invokeSelectAll = function(){
$scope.response = $http.post('/invoke/selectAll/', $rootScope.dataObj);
$scope.object = JSON.stringify($rootScope.object);
console.log(" object operation from selectAll " + $scope.object);
$scope.response.then(function(data) {
$scope.responses = data.data ? data.data : "Select Operation not supported on this bean";
});
}
}]);
Screenshot of dev console:
https://imgur.com/a/8WAAL

Use JSON.stringify() to create a JSON string from a JavaScript object.
Use JSON.parse() to parse a JSON string to a JavaScript object.
In your case, you need to use JSON.parse() because you get a JSON string from the server and want to parse it to a JavaScript object.
$scope.object = JSON.parse($rootScope.object);

you are using JSON.stringify which is used to change javascript object to string and store it as a string only.
You should Parse the data with JSON.parse(), and the data becomes a JavaScript object. and you can easily use that in ng-repeat.
Try it ,It will work fine

How to get specific array from JSON object with Javascript?

I am working with facebook JS SDK which returns user's information in JSON format. I know how to get the response like response.email which returns email address. But how to get an element from a nested array object? Example: user's education history may contain multiple arrays and each array will have an element such as "name" of "school". I want to get the element from the last array of an object.
This is a sample JSON I got:-
"education": [
{
"school": {
"id": "162285817180560",
"name": "Jhenaidah** School"
},
"type": "H**hool",
"year": {
"id": "14404**5610606",
"name": "2011"
},
"id": "855**14449421"
},
{
"concentration": [
{
"id": "15158**968",
"name": "Sof**ering"
},
{
"id": "20179020**7859",
"name": "Dig**ty"
}
],
"school": {
"id": "10827**27428",
"name": "Univer**g"
},
"type": "College",
"id": "9885**826013"
},
{
"concentration": [
{
"id": "108196**810",
"name": "Science"
}
],
"school": {
"id": "2772**996993",
"name": "some COLLEGE NAME I WANT TO GET"
},
"type": "College",
"year": {
"id": "1388*****",
"name": "2013"
},
"id": "8811215**16"
}]
Let's say I want to get "name": "some COLLEGE NAME I WANT TO GET" from the last array. How to do that with Javascript? I hope I could explain my problem. Thank you

Here is a JsFiddle Example
var json = '{}' // your data;
// convert to javascript object:
var obj = JSON.parse(json);
// get last item in array:
var last = obj.education[obj.education.length - 1].school.name;
// result: some COLLEGE NAME I WANT TO GET

If your json above was saved to an object called json, you could access the school name "some COLLEGE NAME I WANT TO GET" with the following:
json.education[2].school.name

If you know where that element is, then you can just select it as already mentioned by calling
var obj = FACEBOOK_ACTION;
obj.education[2].school.name
If you want to select specifically the last element, then use something like this:
obj.education[ obj.education.length - 1 ].scool.name

Try this,
if (myData.hasOwnProperty('merchant_id')) {
// do something here
}
where JSON myData is:
{
amount: "10.00",
email: "someone#example.com",
merchant_id: "123",
mobile_no: "9874563210",
order_id: "123456",
passkey: "1234"
}
This is a simple example for your understanding. In your scenario of nested objects, loop over your JSON data and use hasOwnProperty to check if key name exists.

Merge geojson based on unique ID

I'm a beginner in Javascript so please exuse this probably dumb question. I want to merge two json files based on unique object id.
Number one look like this:
"features": [{
"id": "3876802",
"properties": {
"name": "some name",
"facts": "some facts"}},
{"id": "3876803",
"properties": {"name":"another name"...}}...]
Number Two looks like this:
"features": [{
"id": "3876803",
"properties": {
"description": "some description",
"website": "afancywebsite"}},
{"id": "3876803",
"properties": {...}}]
The Elements in the second Json are not in the same order and not all elements of the first file exist in the second.
The Result should look like this:
"features": [{
"id": "3876802",
"properties": {
"name": "some name",
"facts": "some facts"}},{
"id": "3876803",
"properties": {
"name":"another name",
"description": "some description",
"website": "afancywebsite"}}]
I started coding this but I have no idea how to get it working...
for(var i in json1.features){
for (var z in json2.features){
if (json1.features[i].id===json2.features[z].id){
json1.feature[i].properties = json2.features[z].properties}}}

This will do the job:
var features = [
{"id": "3876802",
"properties": {
"name": "some name",
"facts": "some facts"}
},
{"id": "3876803",
"properties": {
"name":"another name"
}
}
];
var features2 = [{
"id": "3876803",
"properties": {
"description": "some description",
"website": "afancywebsite"
}
}
];
features.map(function(feature){
var matchedArray = features2.filter(function(feature2){
return feature2.id === feature.id;
});
if(matchedArray && matchedArray[0]){
for(var attr in matchedArray[0].properties){
feature.properties[attr] = matchedArray[0].properties[attr];
}
}
});
We start by using Array.map() to run through the 'features' array, one by one.
Then we use Array.filter() on the features2 array which gives us an array containing the only object in features2 (matched[0]) which has the same id as feature.id.
If there's a match, then we run through the 'properties' in the features2 object using a 'for in' loop and copy them to the 'feature' object.
If you want to get advanced info about this check out this stackoverflow question: How can I merge properties of two JavaScript objects dynamically?. For example, if you're writing bullet-proof javascript you should use 'hasOwnProperty' in a for in loop.
You may also want to guard against properties in 'features2' overwriting a property with the same name in 'features'.
However if you would like to keep your code more or less as it was this also works:
for(var i in features){
for (var z in features2){
if (features[i].id===features2[z].id){
for(var attr in features2[z].properties){
features[i].properties[attr] = features2[z].properties[attr];
}
}
}
}

Angular only pulling last JSON object

Trying to get all JSON objects in an array. It's only returning the last one.
Here's a sample of my JSON:
{
"manufacturer":{
"name": "manufacturername",
"cameras": [
{
"name": "sdfsdfsd",
"type": "Audio device",
"resolution": "Unknown",
"channels": "1"
}
]
},
"manufacturer":{
"name": "manufacturername2",
"cameras": [
{
"name": "sdfsdf",
"type": "Camera",
"resolution": "720P/1.3MP",
"channels": "2"
},
{
"name": "D12",
"type": "Camera",
"resolution": "1080P/3MP",
"channels": "1"
}
]
}}
It is valid JSON.
Here's how I'm calling it:
//Get Manufacturer data
$http.get('data2.json').success(function(data) {
$scope.maninfo = data;
console.log($scope.maninfo);
});
The actual array is much longer - and it's just returning the last Object for some reason.

What you have is valid JSON, but it doesn't correctly express your intent. "manufacturer" (or "name", or "cameras") isn't a type name, it's a unique key into a collection of named values -- dictionary, map, hash, whatever(1). JSON data structures are just a subset of JavaScript object literal declarations (hence the name: JavaScript Object Notation).
So the example above is not an array, it's two successive value assignments to the "manufacturer" property of the same parent object. The parser is assigning the first one to the "manufacturer" property, then replacing that with the second (and in your original, larger) "array", it's then replacing that with the third, and so on.
The "cameras" properties in the manfacturer objects are properly functioning arrays. Just do the same at the higher level -- something more like this:
{
"manufacturers":
[
{
"name": "manufacturername",
"cameras": [
{
"name": "sdfsdfsd",
"type": "Audio device",
"resolution": "Unknown",
"channels": "1"
}
]
},
{
"name": "manufacturername2",
"cameras": [
{
"name": "sdfsdf",
"type": "Camera",
"resolution": "720P/1.3MP",
"channels": "2"
},
{
"name": "D12",
"type": "Camera",
"resolution": "1080P/3MP",
"channels": "1"
}
]
}
]
}
(1) Dictionary, map, hash -- or "associative array". But I didn't want to call it any kind of "array" in that paragraph, because the whole point is it's not the other kind of array.