Lua file write append

The following example of the file version of the same implicit file descriptors example is shown below. Read-only mode and is the default mode where an existing file is opened.

An example to use the seek method is shown below. These functions are quite similar to implicit file descriptors. This file is open in update mode and it is automatically removed when the program ends.

The offset is measured from the beginning of the file if the first argument is "set"; from the current position in the file if it's "cur"; or from the end of the file if it's "end".

When called with a file descriptor, it simply sets that file descriptor as the default input file. When using implicit file descriptors, all operations are supplied by table io. The second style uses explicit file descriptors.