Statically delete object key JavaScript

Question

I'm using TypeScript along with TSLint, and I have the following code:

var myObj = {}
var id = "key"
myObj[id] = 1
delete myObj[id]

The rationale for this rule (as stated on the documentation for TSLint):

Deleting dynamically computed keys is dangerous and not well optimized.

My question is, without disabling this hint in the TSLint configuration file, how should I safely and optimally delete the id key in myObj?

Is it just suggesting you `delete myObj.key` without the `[]`? — James, Feb 18 '18 at 14:10
@James no, `delete myObj[id]` is not the same as `dekete myObj.id`. — Ari Seyhun, Feb 18 '18 at 14:13

score 5 · Accepted Answer · answered Feb 18 '18 at 14:28

5

a) ignore the warning
b) use a Map instead

answered Feb 18 '18 at 14:28

Bergi

1

Thanks, I went with [maps](https://www.npmjs.com/package/typescript-map) – Ari Seyhun Feb 18 '18 at 14:52
Did you just set myObj[id] to an empty string? – Winnemucca May 28 '20 at 16:17
@Winnemucca Not sure I understand your question? No, deleting a property (what the OP wants) is different from setting it to an empty string. – Bergi May 28 '20 at 16:19

1 Answers1