Possible to add a nonArray property key with array literal notation?

Question

Let's say I have an array and then I add a non-array-index object property to it:

 let a = [1,2,3]; a['tobey'] = 'marguire'; for (let [idx, elem] of Object.entries(a)) { console.log(idx, '==>', elem); }

Is there a way to do this directly with the literal notation, or does it need to be added separately using only dot/bracket setter notation?I suppose one way might be this, but maybe it doesn't make the intent clear:

 let a = {...[1,2,3], tobey: 'maguire'}; for (let [idx, elem] of Object.entries(a)) { console.log(idx, '==>', elem); }

Answer 1

I don't recommend this, but one way would be the following:

 const a = [1,2,3]; Object.defineProperty(a, 'tobey', { value: 'maguire', enumerable: true }); for (let [idx, elem] of Object.entries(a)) { console.log(idx, '==>', elem); }