Referencing / Parsing an object [duplicate] - javascript

This question already has answers here:
How to iterate over a JavaScript object?
(19 answers)
How to loop through a plain JavaScript object with the objects as members
(28 answers)
How do I loop through or enumerate a JavaScript object?
(48 answers)
Iterate through object properties
(31 answers)
How to iterate (keys, values) in JavaScript? [duplicate]
(11 answers)
Closed 5 years ago.
Very simple question here, I have the following variable. set up in a format like so {item number: quantity, item number, quantity....}
var x = {4214061251:1,2497227651:2,4214140739:2};
My question is simply how do i loop through this properly to access each element.
I would like to be able to access the item numbers and quantities separately, how can I achieve this?


var x = {4214061251:1,2497227651:2,4214140739:2};
// Array of all keys 4214061251, 2497227651 ...
var keysArr = Object.keys(x);
console.log(keysArr);
// Iterate on keys
keysArr.forEach(
(el) => {
// To access keys
console.log("Key: "+el);
// To access values instead
console.log("Value: "+x[el]);
}
)

Related

How can I add an element to a json object in JavaScript? [duplicate]

This question already has answers here:
How to concatenate properties from multiple JavaScript objects
(14 answers)
Closed 6 months ago.
var obj={"student":[{"id":1,"name":"mark"}]}
For example I have this object I want to add another element to it such as this:
var teacher= "teacher":[{"id":1,"name":"Stacy"}]
to make this new object:
var objnew= {"student":[{"id":1,"name":"mark"}], "teacher":[{"id":1,"name":"Stacy"}] }

You can use this code.
var objnew = Object.assign({}, obj, teacher);

How can get the value of all the keys in json array at 1st json element using javascript/jquery [duplicate]

This question already has answers here:
Getting JavaScript object key list
(19 answers)
Closed 3 years ago.
var resultJSON = [{"name":"AAA","createdDate":"8/14/2019"},{"name":"ABAB","_id":"52f0e7719c3fccfabfaaf5218bad7d22","createdDate":"8/14/2019"},{"name":"BBB","_id":"848e3d2fcedad749fa8dc22b97db663a","createdDate":"8/14/2019"}];
for (var k in resultJSON[0]);
alert(resultJSON[k]);

Use Object.keys():
var resultJSON = [{"name":"AAA","createdDate":"8/14/2019"},{"name":"ABAB","_id":"52f0e7719c3fccfabfaaf5218bad7d22","createdDate":"8/14/2019"},{"name":"BBB","_id":"848e3d2fcedad749fa8dc22b97db663a","createdDate":"8/14/2019"}];
console.log(Object.keys(resultJSON[0]));

JavaScript hash of Arrays [duplicate]

This question already has answers here:
How do I loop through or enumerate a JavaScript object?
(48 answers)
Closed 4 years ago.
I have such type of array
How to access Viena
There could be a lot of cities
[{"Viena":[{"date":"2018-11-10","time":"17:45","price":599,"to_city":"Viena","wday":"saturday"},{..},{..}],{"Paris":[{..}]} ]

You can use Array.filter for this.
var data = [{"Viena":[{"date":"2018-11-10","time":"17:45","price":599,"to_city":"Viena","wday":"saturday"}]},{"Paris":[{"date":"2018-11-10","time":"17:45","price":599,"to_city":"Viena","wday":"saturday"}]}];
var result = data.filter(function(value){return Object.keys(value).indexOf("Viena") != -1;});
console.log(result[0]);

JSObjects how to access to children dynamically [duplicate]

This question already has answers here:
How can I access and process nested objects, arrays, or JSON?
(31 answers)
Accessing nested JavaScript objects and arrays by string path
(44 answers)
Closed 5 years ago.
I want to access a JSObject item dynamically:
jsonElement = {
name:"name",
subElement {
subElementName: "nameSubElement",
}
}
And I have the element as:
//level = "name"
jsonElement[level] -> it works
//level = "subElement.nameSubElement"
jsonElement[level] -> not correct. how to?
The important issue I can't do things like json.subElement.nameSubElement because I just have var level.

jsonElement.subElement.subElementName
or
jsonElement["subElement"]["subElementName"]

How to iterate array of objects [duplicate]

This question already has answers here:
Object.length undefined in javascript [duplicate]
(3 answers)
JavaScript object literal length === undefined?
(5 answers)
Closed 5 years ago.
Here is my jsfiddle
Here is my array looks like
var arr = [];
arr['alpha'] = {'a':'1','b':'1'};
arr['beta'] = {'a':'2','b':'4'};
console.log(arr)
When i take console.log(arr.length) It says 0. So i can't able to for loop this one
How can i iterate this array ?
Note :
I don't want to use jquery, i prefer only javascript

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