apl - The UCSF APL interpreter
The UCSF APL interpreter contains all the APL 360 operators
plus execute (epsilon), scan, and relational character
operators. The maximum workspace size is about 50,000
Function definition is not what you would expect. Functions
are created and modified with the system editor. Type `)EDIT
fname' or `)EX fname' to creat or modify a function. Type
`)READ fname' if it exists and doesn't need editing.
The following I-beams are recognized by APL:
2iF Create F for writing.
1i0, 2i0, 3i0 Close the named channel.
Only one read channel and one write channel may be open
simultaneously. When a file is open for reading, references
to the quad or quote-quad variable are actually references
to the named file. When open for writing, assignments to the
quad variable are written to the file.
10iC Send command C to the shell.
The command will be executed as if it were typed at a UNIX
terminal. This is equivalent to the `!' feature of the edi-
Monadic I-beam functions are: 20 for the time of day, 21 to
return CPU time used, 22 to return WS free in bytes, 24 to
return the starting time, 25 to return the date, 28 to re-
turn the starting date, 29 to read the index origin, 30 to
read the terminal width, 31 to read the printing precision
(or `digits'), and 32 to run the shell.
No trace function or state indicator.
No `)WSID' command. The existing system commands take only
A `)WRITE fname' command is needed to get at functions which
exist only in workspaces.
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