>> Append File

Writes stdin to disk - appending contents if file already exists

Description

This is used to redirect the stdout of a command and append it to a file. If that file does not exist, then the file is created.

This behaves similarly to the Bash (et al) token except it doesn't support adding alternative file descriptor numbers. Instead you will need to use named pipes to achieve the same effect in Murex.

Examples

» out "Hello" >> example.txt
» out "World!" >> example.txt
» open example.txt
Hello
World!

Detail

Syntactic Sugar

This is just syntactic sugar for -> >>. Thus when the parser reads code like the following:

out "foobar" >> example.txt

it will compile an abstract syntax tree which would reflect the following code instead:

out "foobar" | >> example.txt

Truncating A File

To truncate a file (ie overwrite its contents) use |> instead.

Synonyms

• >>
• fappend

See Also

• Create Named Pipe (pipe): Manage Murex named pipes
• Output String (out): Print a string to the stdout with a trailing new line character
• Pipeline: Overview of what a "pipeline" is
• Read / Write To A Named Pipe (<pipe>): Reads from a Murex named pipe
• Truncate File (>): Writes stdin to disk - overwriting contents if file already exists
• -> Arrow Pipe: Pipes stdout from the left hand command to stdin of the right hand command
• | POSIX Pipe: Pipes stdout from the left hand command to stdin of the right hand command

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This document was generated from builtins/core/io/write_doc.yaml.