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6 points by eds 6109 days ago | link | parent

y!x is short for (y 'x), and y.x is short for (y x)

It should also be noted that a.b and a!b only works when a and b are symbols or integers. You can't for example

  car!(1 2 3)
To do this correctly you first have to store the list in a variable

  (= l '(1 2 3))
  car.l
http://arclanguage.org/item?id=2166