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I remember when I saw the access operator "->" for the firsr time written as just a single connected right pointing arrow on a whiteboard as part of my first intro to programming class and being so confused about what button I was missing on my keyboard!

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IBM used to have a specific keyboard for APL programmers :-) Go big or go home.

The key (vulgo button) is not missing, merely the legend (vulgo labelling). In X, you can either press AltGr + i or Compose, -, >.

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