can JS automatically assign keys like PHP?

in PHP, keys can automatically be assigned without requiring a name or variable:

$myObject = ['someCrap' =>[]];
for($i=0;$i<=10;$i++) {
  $myObject['someCrap'][] = 90 * $i;
};
var_dump($myObject);

can this be done in Javascript? i’ve tried the following code:

let myObject = {'someCrap':{}}
for(let i=0;i<=10;i++) {
  myObject['someCrap'][] = 90 * i
}
console.log({myObject})

which yields Uncaught SyntaxError: expected expression, got ']'. is there a way to make this happen without using counters, or is that the only way to do this?

Answer

You need to use an array, not an object. The JS equivalent of assigning to [] is the .push() method.

let myObject = {
  'someCrap': []
}
for (let i = 0; i <= 10; i++) {
  myObject['someCrap'].push(90 * i)
}
console.log(myObject)