Let me ask gemini

Wow, it deconstructed it beautifully

A Concrete Example Imagine you pass this array to the function: ['alert', 'Hello World'] Here is the step-by-step execution:

  Initialization: The accumulator a starts as self (the window object).
  Iteration 1 (b = "alert"):
  I("alert") returns string "alert".
  It tries a["alert"] (which is window["alert"]).
  This finds the alert function.

  New Accumulator a: The alert function.
  Iteration 2 (b = "Hello World"):
  I("Hello World") returns string "Hello World".
  It tries a["Hello World"]. The alert function does not have a property named "Hello World", so this is undefined.
  The || operator moves to the right side: a(b).
  It executes alert("Hello World").
  Result: A browser popup appears.