ucuseless code

/*de*/let/*e  x  .  ={*/a/*}*/=false
/*de*/let/*e*/x/*.*/={  a  }/*=false*/
    delete    x  ./*={*/a/*}  =false*/

([{a}]) => ([{a}])

({a}) => ({a})

' + ' + ' + ' + ' + ' + ' + ' + ' + '

[[0][0]][[0][0]]

(o => o)(o => o)

[true, ...[], ...[], ...[], ...[], ...[], ...[], ...[], false]
[[[[[[[[[[[[[[[[[, ...[], ...[], ...[]].length]]]]]]]]]]]]]]]]