Appendix:APL

This appendix contains APL (A Programming Language) symbols.

Index

• ε: monadically creates a vector of all of the elements of a structure, or dyadically tests whether an element is present in a structure
• ≡: monadically determines the nested depth of a structure, or dyadically tests two structures for identicalness
• ⌹: matrix inversion or division
• ⌽: reverse of shift a matrix structure
• ⌿: reduction
• ⍀: scanning
• ⍉: reorders a data structure
• ⍋: sorts a data structure ascendingly
• ⍎: executes code from a string
• ⍒: sorts a data structure descendingly
• ⍕: generates formatted strings
• ⍞: displays a prompt to enter text
• ⍟: computes logarithms
• ⍪: catenation
• ⍫: prevents viewing and editing a piece of code
• ⍬: represents an empty numeric vector
• ⍱: NOR
• ⍲: NAND
• ⍳: monadically generates a series of integers, or dyadically finds one set of items with another
• ⍴: monadically queries the shape of a data structure, or dyadically modifies it
• ⍷: finds instances of one item within another
• ⍺: formats numbers as strings