Questions tagged [object-properties]
117 questions
27
votes
7 answers
Accessing different properties in a typescript union type
I'm creating a function that handles objects from the database. I have two different data structures where the same property has a different name. I can't change that, so I have to handle it in JavaScript.
The objects have other differences, but…
KWeiss
- 2,954
- 3
- 21
- 37
27
votes
5 answers
Javascript - catch access to property of object
Is it possible to capture when a (any) property of an object is accessed, or attempting to be accessed?
Example:
I have created custom object Foo
var Foo = (function(){
var self = {};
//... set a few properties
return self;
})();
Then…
Randy Hall
- 7,716
- 16
- 73
- 151
15
votes
1 answer
JavaScript - Proxy set vs. defineProperty
I want to build a proxy that detects changes to an object:
New properties are defined.
Existing properties are changed.
Code Sample 1 - defineProperty
const me = {
name: "Matt"
}
const proxy = new Proxy(me, {
defineProperty: function(target,…
Matthew Layton
- 39,871
- 52
- 185
- 313
12
votes
4 answers
Object properties dynamic delete
I am curious about an improved way to dynamically delete properties from a javascript object based on wildcards. Firstly, suppose I have the following object:
object =
{
checkbox_description_1 : 'Chatoyant',
checkbox_description_2 :…
Symbal
- 360
- 1
- 3
- 12
11
votes
2 answers
Why is this object property undefined?
Consider the code below. The first console.log correctly logs the image, and you can see its properties in the image below. However, when I try logging one if its properties to the console, I get undefined!
console.log(that.data[0].cards); //works…
maxedison
- 17,243
- 14
- 67
- 114
8
votes
3 answers
Override Object Property for unit testing purposes
I am using Jest to perform unit tests on a Node.js app, where the code source is written in TypeScript and then compiled into JavaScript.
In one of the classes that I wish to test, an external module is imported and a method from this module is…
Reyedy
- 918
- 2
- 13
- 36
8
votes
3 answers
Default sort property
Using PowerShell, I'm trying to understand the concept of default sort property.
According to this example, provided for the Sort-Object command :
PS C:\>get-childitem | sort-object
Because no properties are specified, Sort-Object uses the default…
Jérôme
- 26,567
- 29
- 98
- 120
6
votes
1 answer
How can I make object properties in console.log(obj) display alphabetically in Chrome?
It used to be that, when I used console.log(obj) to display an object's properties in Javascript, the properties would display alphabetically. Recently, this seems to have changed. I assume that the new order is closer to how the properties are…
IndigoFenix
- 291
- 2
- 20
6
votes
2 answers
Get the difference two objects by subtracting properties
I am trying to get the difference between two objects
previousChart: {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
currentChart: {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2}
The desired answer is:
newObject ={BWP: 0, ZAR: 0.05, USD: 0.08324, number:…
Tino Costa 'El Nino'
- 223
- 4
- 13
5
votes
3 answers
Rxjs - remap object with observables as values
I got an observable like this:
const original = Observable.of({
a: this.http.get('https://jsonplaceholder.typicode.com/todos/11'),
b: this.http.get('https://jsonplaceholder.typicode.com/todos/22'),
c:…
Patrik Jajo Jajcay
- 63
- 9
5
votes
4 answers
Is an if with a continue a good pattern to prevent excessive nesting while iterating over properties in Javascript?
I normally use this pattern to iterate over object properties:
for(var property in object) {
if(object.hasOwnProperty(property)) {
...
}
}
I don't like this excessive indentation and recently it was pointed out to me that I could get…
Vivin Paliath
- 94,126
- 40
- 223
- 295
4
votes
0 answers
How can I query Object Properties in an OWL ontology
I am working with the FoodOn ontology and need to figure out if a certain class is somehow related to another class. Typical use case: Can a vegan person eat honey? No, because honey is a subsub class of "invertebrate animal food product"!
I am…
Solarer
- 71
- 1
4
votes
2 answers
How to iterate through all properties and its values in Typescript class
How do I iterate through list of class properties and get the values of each (only the properties and not the functions)
class Person{
name:string;
age:number;
address:Address;
getObjectProperties(){
let json = {};
// I need to…
Dharshni
- 181
- 1
- 6
4
votes
3 answers
Access static object property through variable name
I know its possible to access an object property/method using a variable as its name
ex.:
$propName = 'something';
$something = $object->$propName;
Is it possible to do the same w/ constants or static properties?
I've tried:
$constName =…
CarlosCarucce
- 3,420
- 1
- 28
- 51
4
votes
4 answers
Passing Objects into PHP constructor error
Is it possible to pass an object into the constructor of a PHP class, and set that object as a global variable that can be used by the rest of the functions in the class?
For example:
class test {
function __construct($arg1, $arg2, $arg3) {
…
littleK
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