)
}
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(
}
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Shorthand Primitives Golfing

  1. !0 // true
  2.  
  3. !1 // false
  4.  
  5. 1/0 // Infinity
  6.  
  7. 0[0] // undefined (any digit works)

This is from user Isiah Meadows on the codegolf stackexchange…

snippet.zone ~ 2021-22 /// {s/z}