¿Cuáles son los modos y opciones de Ruby File.open?

ruby raise

Question

File.open de Ruby toma modos y opciones como argumentos. ¿Dónde puedo encontrar una lista completa de modos y opciones?

Answer 1

En la documentación del módulo Ruby IO , supongo.

Mode | Meaning
-----+--------------------------------------------------------
"r" | Read-only, starts at beginning of file (default mode).
-----+--------------------------------------------------------
"r+" | Read-write, starts at beginning of file.
-----+--------------------------------------------------------
"w" | Write-only, truncates existing file
| to zero length or creates a new file for writing.
-----+--------------------------------------------------------
"w+" | Read-write, truncates existing file to zero length
| or creates a new file for reading and writing.
-----+--------------------------------------------------------
"a" | Write-only, starts at end of file if file exists,
| otherwise creates a new file for writing.
-----+--------------------------------------------------------
"a+" | Read-write, starts at end of file if file exists,
| otherwise creates a new file for reading and
| writing.
-----+--------------------------------------------------------
"b" | Binary file mode (may appear with
| any of the key letters listed above).
| Suppresses EOL <-> CRLF conversion on Windows. And
| sets external encoding to ASCII-8BIT unless explicitly
| specified.
-----+--------------------------------------------------------
"t" | Text file mode (may appear with
| any of the key letters listed above except "b").

Answer 2

opt es nuevo para ruby ​​1.9. Las diversas opciones están documentadas en IO.new : www.ruby-doc.org/core/IO.html