Language Features

At the moment, the following sections describe only those language features that are New or Enhanced relative to the Extended APL Standard, or that deserve special comment.

• Syntax
  • Strand Assignment
  • Modify Assignment
  • Modify Strand Assignment
  • Function/Operator Assignment
  • Sink
• Primitive functions
  • Bracket Indexing
  • Index Generator
  • Index Of
  • Matrix Inverse/Divide
• Primitive operators
  • Axis (f[X], f op1[X], f op2[X]g)
  • Composition (f∘g, f∘R, L∘g)
  • Null (f⊙)
  • Rank (f⍤X)
  • Rank with Axis (f⍥[X])
• Datatypes
  • Infinity (_ and ¯_)
  • Arithmetic Progression Arrays (2 3 4⍴⍳24)
  • Unicode Characters
• System Functions
  • ⎕CR (Canonical Representation)
  • ⎕DM (Diagnostic Message)
  • ⎕DR (Data Representation)
  • ⎕ERROR (Error Signal)
  • ⎕SIZE (Object Size)
  • ⎕SYSID (System Identifier)
  • ⎕SYSVER (System Version)
  • ⎕TC and related ⎕TCxxx (Terminal Control)
  • ⎕TYPE (Prototype)
  • ⎕UCS (Universal Character Set)
• System Variables
  • ⎕FC (Format Control)
  • ⎕IC (Indeterminate Control)