§ Things I wish I knew when I was learning APL

• Operators in APL terminology (such as ¨) are higher order functions.Thus, an operator allows one to modify known functions.
• Use ]disp and ]display to understand the structure of APL arrays.
• Set ]box on -style=max to always enable drawing arrays with ]display.This is supremely useful as a newbie to understand array structure.
• Set ]box on -trains=parens to render trains as trees. Superhelpful when attempting to grok train code.
• Set ]boxing on to enable boxing for trains, arguments, everything.