All Questions
Tagged with object ecmascript-6
1,090
questions
1
vote
2
answers
66
views
Get value from Javascript object using for loop
I am having an issue getting accessing the value from a key of an object.
I am passing in this.fields which has 2 objects in an array like,
[{'First Name': 'firstName'}, {'Last Name': 'lastName'}]
...
- 2,425
29
votes
2
answers
5k
views
What is an "internal slot" of an object in JavaScript?
I've tried to understand ECMAScript 2015 specification in one point: Internal Slots of Objects. But this section appeared very unclear to me, especially this sentence:
Internal slots correspond to ...
- 3,095
1
vote
3
answers
79
views
Combine object and arrays
I'm trying to write a function that takes an array of objects, and an unlimited number of arrays, and combines them to form a single object. The inputs would follow this pattern:
let x = [{ name: '...
- 41
3
votes
1
answer
155
views
Does ECMA6 do away with using prototype syntax as a best practice in JavaScript?
Example,
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes
JavaScript classes are introduced in ECMAScript 6 and are syntactical
sugar over JavaScript's existing ...
- 19.6k
0
votes
3
answers
113
views
How can I make an object property be both a function and a variable in Javascript?
I have seen* something where a certain key can be called both as a variable and as a function.
The variable would return a value, the function would do something functiony.
obj.test
// E.g. 16
obj....
- 11.3k
38
votes
5
answers
13k
views
Difference between Configurable and Writable attributes of an Object
I saw the following regarding javascript, object data property attributes
—
Configurable: Specifies whether the property can be deleted or changed.
— Enumerable: Specifies whether the property can ...
- 8,979
7
votes
2
answers
301
views
MDN "Object.is" alternative proposal
I have read the MDN page on the "Object.is" method.
It gives an alternative code for the browsers that do not provide this method:
if (!Object.is) {
Object.is = function(v1, v2) {
if (v1 =...
- 87
7
votes
3
answers
3k
views
JavaScript Symbol type: (non-string object keys)
What is the "Symbol" javascript type as mentioned in this ECMAScript 6 draft specification?
To quote the spec:
The Symbol type is the set of all non-String values that may be used as the ...
- 73.9k
2
votes
2
answers
352
views
Problems with extending regular Objects to support ES5 Array capabilities
I have long ago been willing to get the line between native Arrays and regular Objects totally blurred, not only extending Object with the same capabilities as Arrays got in ES5, but bundle up with my ...
86
votes
10
answers
121k
views
How to create a derived class in JavaScript?
I have a base class:
function Monster() {
this.health = 100;
}
Monster.prototype.growl = function() {
console.log("Grr!");
}
That I want to extend and create another class with:
function ...
- 2,664