Macaulay2 » Documentation
Packages » Macaulay2Doc » The Macaulay2 language » system facilities » communicating with programs » Program << Thing

next | previous | forward | backward | up | index | toc

Program << Thing -- run program with input redirection

Operator: <<
Usage:

prog << x
Inputs:
- prog, an instance of the type Program,
- x, a thing,
Outputs:
- an instance of the type ProgramRun,

Description

Write x to a temporary file and run prog with this file as input using input redirection (the < operator in a POSIX shell).

i1 : M2 = findProgram "M2"

o1 = M2

o1 : Program

i2 : M2 << "2 + 2"

o2 = 0

o2 : ProgramRun

i3 : toString oo

o3 = Type "help" to see useful commands

     i1 : 2 + 2
          
     o1 = 4

See also

findProgram -- load external program
runProgram -- run an external program
get -- get the contents of a file

Ways to use this method:

Program << Thing -- run program with input redirection

The source of this document is in Macaulay2Doc/functions/runProgram-doc.m2:157:0.