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Oct 16th, 2018
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  1. > var foo = function() { return foo; }
  2. undefined
  3.  
  4. > foo
  5. function () { return foo; }
  6.  
  7. > foo()
  8. function () { return foo; }
  9.  
  10. > foo()() === foo()()()()()()()()
  11. true
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