Hacker News Reader

Comment by reidjs | Hacker News Reader

Those logical assignment operators look pretty neat. I wish they went into detail about how they work and how to use them, though.

Here's more information on the 3 new logical assignments

Logical OR assignment (||=) [1] Logical AND assignment (&&=) [2] Logical nullish assignment (??=) [3]

An example for OR assignment:

  let a = '';
  a ||= 'hello';
  console.log(a); // prints 'hello'
  a ||= 'not this';
  console.log(a); // prints 'hello'

Finally. I missed that idiom from Ruby so much.

Might save a few keystrokes here and there:

Could be used for ubfuscation