isOutputFile(File) -- whether a file is open for output

Synopsis

• Function: isOutputFile

• Usage:

  isOutputFile f

• Inputs:
  • f
• Outputs:
  • a Boolean value, whether f is an open output file

Description

i1 : f = "test-file" << "hi there"

o1 = test-file

o1 : File

i2 : isOutputFile f

o2 = true

i3 : close f

o3 = test-file

o3 : File

i4 : isOutputFile f

o4 = false

i5 : get "test-file"

o5 = hi there

i6 : removeFile "test-file"

See also

• openOut -- open an output file
• openInOut -- open an input output file
• close -- close a file
• get -- get the contents of a file
• removeFile -- remove a file