4,839 questions
1139
votes
31
answers
1.3m
views
How can I access and process nested objects, arrays, or JSON?
I have a nested data structure containing objects and arrays. How can I extract the information, i.e. access a specific or multiple values (or keys)?
For example:
var data = {
code: 42,
...
- 818k
991
votes
22
answers
680k
views
Accessing an object property with a dynamically-computed name
I'm trying to access a property of an object using a dynamic name. Is this possible?
const something = { bar: "Foobar!" };
const foo = 'bar';
something.foo; // The idea is to access something.bar, ...
- 11k
5157
votes
67
answers
3.0m
views
What is the most efficient way to deep clone an object in JavaScript?
What is the most efficient way to clone a JavaScript object? I've seen obj = eval(uneval(o)); being used, but that's non-standard and only supported by Firefox. I've done things like obj = JSON.parse(...
328
votes
14
answers
98k
views
How can I sort arrays and data in PHP?
This question is intended as a reference for questions about sorting arrays in PHP. It is easy to think that your particular case is unique and worthy of a new question, but most are actually minor ...
- 523k
423
votes
16
answers
618k
views
How do I print my Java object without getting "SomeType@2f92e0f4"?
I have a class defined as follows:
public class Person {
private String name;
// constructor and getter/setter omitted
}
I tried to print an instance of my class:
System.out.println(myPerson);
...
- 69.5k
993
votes
16
answers
491k
views
Does JavaScript guarantee object property order?
If I create an object like this:
var obj = {};
obj.prop1 = "Foo";
obj.prop2 = "Bar";
Will the resulting object always look like this?
{ prop1 : "Foo", prop2 : "Bar" }
That is, will the properties be ...
- 23.4k
90
votes
6
answers
153k
views
How can I access an array/object?
I have the following array and when I do print_r(array_values($get_user));, I get:
Array (
[0] => 10499478683521864
[1] => 07/22/1983
[2] => [email protected]
...
- 1,673
949
votes
63
answers
1.3m
views
Most efficient method to groupby on an array of objects
What is the most efficient way to groupby objects in an array?
For example, given this array of objects:
[
{ Phase: "Phase 1", Step: "Step 1", Task: "Task 1", Value: "5" },
{ Phase: "Phase ...
- 12k
1032
votes
76
answers
972k
views
How can I determine equality for two JavaScript objects?
A strict equality operator will tell you if two object types are equal. However, is there a way to tell if two objects are equal, much like the hash code value in Java?
Stack Overflow question Is ...
user4903
1508
votes
10
answers
1.5m
views
Object comparison in JavaScript [duplicate]
What is the best way to compare objects in JavaScript?
Example:
var user1 = {name : "nerd", org: "dev"};
var user2 = {name : "nerd", org: "dev"};
var eq = user1 == user2;
alert(eq); // gives false
I ...
- 22.3k
881
votes
64
answers
419k
views
Test for existence of nested JavaScript object key
If I have a reference to an object:
var test = {};
that will potentially (but not immediately) have nested objects, something like:
{level1: {level2: {level3: "level3"}}};
What is the best way to ...
- 323k
954
votes
78
answers
1.3m
views
How to remove all duplicates from an array of objects?
I have an object that contains an array of objects.
obj = {};
obj.arr = new Array();
obj.arr.push({place:"here",name:"stuff"});
obj.arr.push({place:"there",name:"...
- 10.9k
1040
votes
46
answers
1.6m
views
Sorting object property by values
If I have a JavaScript object such as:
var list = {
"you": 100,
"me": 75,
"foo": 116,
"bar": 15
};
Is there a way to sort the properties based on value? So that I end up with
list = {
"...
- 17.6k
2487
votes
19
answers
1.2m
views
Calling a function of a module by using its name (a string)
How do I call a function, using a string with the function's name? For example:
import foo
func_name = "bar"
call(foo, func_name) # calls foo.bar()
- 36.8k
343
votes
13
answers
393k
views
Add a property to a JavaScript object using a variable as the name?
I'm pulling items out of the DOM with jQuery and want to set a property on an object using the id of the DOM element.
Example
const obj = {}
jQuery(itemsFromDom).each(function() {
const element =...
- 18.5k