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Iterating over a json array whose key value is dynamic

I have a json structure as:
{
"TestCaseList": [
{
"TC_1": {
"name":"verifyloginpagedetails",
"value":"2"
},
"TC_2": {
"name":"verify registration page details",
"value":"3"
}
}
],
"Summary": {
"v":[
{
"name":"over the ear headphones - white/purple",
"value":1
}
]
}
}
How to extract the values name, value of TC_1 , TC_2 where TC_1 is dynamic i.e. key of TestCaseList?

You can use the Object.keys method to get an array of the keys of an object.
With a single object in the array at "TestCaseList" in your JSON object, this will work:
// jsonObj is your JSON
testCaseKeys = Object.keys(jsonObj.TestCaseList[0]);
If, however, the array at "TestCaseList" contains more than one one element, you can use this to get each set of keys in an individual array:
testCaseKeySets = jsonObj.TestCaseList.map(obj => Object.keys(obj));

I'm sure a more elegant solution exists, but this will do the trick.
var myObj = {
"TestCaseList":
[{
"TC_1":
{"name":"verifyloginpagedetails",
"value":"2"},
"TC_2":
{"name":"verify registration page details",
"value":"3"}
}],
"Summary":{
"v":[{"name":"over the ear headphones - white/purple","value":1}]
}
}
let testCaseListKeys = Object.keys(myObj.TestCaseList[0]);
for(i=0; i < testCaseListKeys.length; i++){
let tclKey = testCaseListKeys[i];
console.log(tclKey + "\'s name = " + myObj.TestCaseList[0][tclKey].name);
console.log(tclKey + "\'s value = " + myObj.TestCaseList[0][tclKey].value);
}
The console.logs are your output. The important values there are the myObj.TestCaseList[0][tclKey].name and the myObj.TestCaseList[0][tclKey].value
** UPDATE **
After answering the question Ananya asked how to do this same thing if the object had a different structure.
Updated Object:
var myObj2 = {
"TestCaseList":
[{
"TC_1":{
"name":"verifyloginpagedetails",
"value":"2"}
},
{
"TC_2":{
"name":"verify registration page details",
"value":"3" }
}],
"Summary":
{
"v":[ {"name":"over the ear headphones - white/purple","value":1} ]
}
}
Updated JavaScript:
for(x=0;x<myObj2.TestCaseList.length;x++) {
let testCaseListKeys = Object.keys(myObj2.TestCaseList[x]);
for(i=0; i < testCaseListKeys.length; i++){
let tclKey = testCaseListKeys[i];
//console.log(tclKey);
console.log(tclKey + "\'s name = " + myObj2.TestCaseList[x][tclKey].name);
console.log(tclKey + "\'s value = " + myObj2.TestCaseList[x][tclKey].value);
}
}

Iterate through JSON-Object Array

I parsed a XML file and retrieved the following JSON-object.
The issue is that there are dashes in the json, which causes problems iterating through the object. I can not get rid off them unfortunately.
$(function() {
let json = JSON.parse('{"app-app":{"$":{},"notneeded":"123","mapped":{"$":{},"match-match":[{"$":{},"name":"Foo 1","url":"/Bar 1"},{"$":{},"name":"Foo 2","url":"/Bar 2"},{"$":{},"name":"Foo 3","url":"Bar 3"}]},"Nothing":"123"}}');
var foo = Object.keys(json['app-app']['mapped']['match-match']).length;
for (var i = 0; i < foo; i++) {
console.log(json['app-app']['mapped']['match-match'][i].name);
console.log(json['app-app']['mapped']['match-match'][i].url);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
I would like to iterate through the object and extract every "match" children. Something like this:
return [
{
name: 'Foo 1',
url: 'Bar 1'
},
[...]
]
Thanks you in advance.

You can simply use Array.prototype.map(), to iterate over your json array and return your custom structure, like this:
$(function() {
let json = JSON.parse('{"app-app":{"$":{},"notneeded":"123","mapped":{"$":{},"match-match":[{"$":{},"name":"Foo 1","url":"/Bar 1"},{"$":{},"name":"Foo 2","url":"/Bar 2"},{"$":{},"name":"Foo 3","url":"Bar 3"}]},"Nothing":"123"}}');
var result = json['app-app']['mapped']['match-match'].map(function(item) {
return {
"name": item.name,
"url": item.url
};
});
console.dir(result);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
It will give you the expected result.

let json = JSON.parse('{"app":{"$":{},"notneeded":"123","mapped":{"$":{},"match":[{"$":{},"name":"Foo 1","url":"/Bar 1"},{"$":{},"name":"Foo 2","url":"/Bar 2"},{"$":{},"regex":"Foo 3","configuration":"Bar 3"}]},"Nothing":"123"}}');
console.log(json['app']['mapped']['match']);

Extract values from JSON

I have the below JSON string. The id-dashes in the file are not optional unfortunately, neither is the syntax. I would like to extract the "dd" values with JavaScript/Node.
{
"a-id":{
"b-id":"random",
"bb-id":"random",
"bbb-id":"random",
"bbbb-id":{
"c":[
{
"d":"random",
"dd":"This_info_is_needed"
},
{
"d":"random",
"dd":"This_info_is_needed"
},
{
"d":"random",
"dd":"This_info_is_needed"
},
{
"d":"random",
"dd":"This_info_is_needed_2"
}
]
},
"bbbbb-id":"random",
"bbbbbb-id":"random"
}
}
I would be open to use any additional helper like lodash, jQuery, etc.
The output should be an array with: This_info_is_needed and This_info_is_needed_2.
Thank you in advance.

You can create custom function that will search your data deep and return value if key is dd using for...in loop.
var obj = {"a-id":{"b-id":"random","bb-id":"random","bbb-id":"random","bbbb-id":{"c":[{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"}]},"bbbbb-id":"random","bbbbbb-id":"random"}}
function getDD(data) {
var result = []
for(var i in data) {
if(i == 'dd') result.push(data[i])
if(typeof data[i] == 'object') result.push(...getDD(data[i]))
}
return result
}
console.log(getDD(obj))

If you just interested in the values only, can also just do this:
var obj = {"a-id":{"b-id":"random","bb-id":"random","bbb-id":"random","bbbb-id":{"c":[{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"},{"d":"random","dd":"This_info_is_needed"}]},"bbbbb-id":"random","bbbbbb-id":"random"}};
var desiredResults = obj['a-id']['bbbb-id']['c'].map(function(data){return data.dd});
console.log(desiredResults);

How to Iterate over a hash in mustache.js

Given this hash
a = {
foo : { ... },
bar : { ... },
zap : { ... }
}
i want to iterate over it but since the keys are different I am not sure how to in Mustache.js
the output will look something like this foo : (contents here)

If you know the key in the nested object that you're trying to retrieve, you can use a function.
see: http://jsfiddle.net/jimschubert/zPWDJ/
js:
$(function() {
var names = {
"a": [
{"foo": { "name": "foo name"}},
{"bar": { "name": "bar name"}},
{"zap": { "name": "zap name"}}
],
"n": function() {
var self = this;
var n = "";
Object.keys(self).forEach(function(k, v) {
if (typeof self[k] == "object") {
if(!n) n = self[k]["name"];
}
});
return n;
}
};
var template = $('#template').html();
var out = $('#output');
var html = Mustache.to_html(template, names);
console.log(html);
out.html(html);
});​
html:
<script id="template" class="template" type="text/x-mustache">
{{#a}}
<p>{{n}}</p>
{{/a}}
</script>
<h1>Output</h1>
<div id="output">
</div>
​
This of course assumes your data is an array of objects (the a in your post would be one key of a greater array, maybe?) If you don't have an array, I don't see why you wouldn't be able to adjust this for an object and make a getter function for whatever properties of each key you're looking for.

Use a JSON array with objects with javascript

I have a function that will get a JSON array with objects. In the function I will be able to loop through the array, access a property and use that property. Like this:
Variable that I will pass to the function will look like this:
[{
"id": 28,
"Title": "Sweden"
}, {
"id": 56,
"Title": "USA"
}, {
"id": 89,
"Title": "England"
}]
function test(myJSON) {
// maybe parse my the JSON variable?
// and then I want to loop through it and access my IDs and my titles
}
Any suggestions how I can solve it?

This isn't a single JSON object. You have an array of JSON objects. You need to loop over array first and then access each object. Maybe the following kickoff example is helpful:
var arrayOfObjects = [{
"id": 28,
"Title": "Sweden"
}, {
"id": 56,
"Title": "USA"
}, {
"id": 89,
"Title": "England"
}];
for (var i = 0; i < arrayOfObjects.length; i++) {
var object = arrayOfObjects[i];
for (var property in object) {
alert('item ' + i + ': ' + property + '=' + object[property]);
}
// If property names are known beforehand, you can also just do e.g.
// alert(object.id + ',' + object.Title);
}
If the array of JSON objects is actually passed in as a plain vanilla string, then you would indeed need eval() here.
var string = '[{"id":28,"Title":"Sweden"}, {"id":56,"Title":"USA"}, {"id":89,"Title":"England"}]';
var arrayOfObjects = eval(string);
// ...
To learn more about JSON, check MDN web docs: Working with JSON
.

This is your dataArray:
[
{
"id":28,
"Title":"Sweden"
},
{
"id":56,
"Title":"USA"
},
{
"id":89,
"Title":"England"
}
]
Then parseJson can be used:
$(jQuery.parseJSON(JSON.stringify(dataArray))).each(function() {
var ID = this.id;
var TITLE = this.Title;
});

By 'JSON array containing objects' I guess you mean a string containing JSON?
If so you can use the safe var myArray = JSON.parse(myJSON) method (either native or included using JSON2), or the usafe var myArray = eval("(" + myJSON + ")"). eval should normally be avoided, but if you are certain that the content is safe, then there is no problem.
After that you just iterate over the array as normal.
for (var i = 0; i < myArray.length; i++) {
alert(myArray[i].Title);
}

Your question feels a little incomplete, but I think what you're looking for is a way of making your JSON accessible to your code:
if you have the JSON string as above then you'd just need to do this
var jsonObj = eval('[{"id":28,"Title":"Sweden"}, {"id":56,"Title":"USA"}, {"id":89,"Title":"England"}]');
then you can access these vars with something like jsonObj[0].id etc
Let me know if that's not what you were getting at and I'll try to help.
M

#Swapnil Godambe
It works for me if JSON.stringfy is removed.
That is:
$(jQuery.parseJSON(dataArray)).each(function() {
var ID = this.id;
var TITLE = this.Title;
});

var datas = [{"id":28,"Title":"Sweden"}, {"id":56,"Title":"USA"}, {"id":89,"Title":"England"}];
document.writeln("<table border = '1' width = 100 >");
document.writeln("<tr><td>No Id</td><td>Title</td></tr>");
for(var i=0;i<datas.length;i++){
document.writeln("<tr><td>"+datas[i].id+"</td><td>"+datas[i].Title+"</td></tr>");
}
document.writeln("</table>");