dynamic delete problem

[dijs]

Cannot delete using dynamic property key...

For example:

x = {a:0, b:1, c:2}
t = 'a'
delete property t from x

You see the problem?

We need a way of deleting with dynamic keys.

[Pomax]

Salient detail: the "delete" operation forces JIT compilers to completely redo their type trees in most modern browsers. This construction, once translated to native JS, is going to wreck performance.

[dijs]

So, should we just learn to use JS without using the delete operation?

[Pomax]

Pretty much. There isn't really any solid use case for ever using the delete operator. For each use case you might consider it in, there is generally a better solution that doesn't involve using it.