Io.open

Available since: Gideros 2011.6
Class: io

Description

This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message.

The mode string can be any of the following:

"r": read mode (the default);
"w": write mode;
"a": append mode;
"r+": update mode, all previous data is preserved;
"w+": update mode, all previous data is erased;
"a+": append update mode, previous data is preserved, writing is only allowed at the end of file.

The mode string can also have a 'b' at the end, which is needed in some systems to open the file in binary mode.
This string is exactly what is used in the standard C function fopen.

(file) = io.open(filename,mode)

Parameters

filename: (string) filename to open
mode: (string) mode in which to open the file optional

Return values

Returns (file) file object