File and IO Operations

Parameters

|Flag | 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. Suppresses EOL <-> CRLF conversion on Windows. And sets external encoding to ASCII-8BIT unless explicitly specified. (This flag may only appear in conjunction with the above flags. For example, File.new("test.txt", "rb") would open test.txt in read-only mode as a binary file.) |“t” | Text file mode. (This flag may only appear in conjunction with the above flags. For example, File.new("test.txt", "wt") would open test.txt in write-only mode as a text file.)