Io.lines
Available since: Gideros 2011.6
Class: io
Description
Opens the given file name in read mode and returns an iterator function. Each time the iterator function is called, it returns a new line from the file.
The call io.lines() (with no file name) is equivalent to io.input():lines() that is, it iterates over the lines of the default input file. In this case it does not close the file when the loop ends. <syntaxhighlight lang="lua"> (function) = io.lines(filename) </source>
When the iterator function detects the end of file, it returns nil (to finish the loop) and automatically closes the file.
Parameters
filename: (string) filename to open optional
Return values
Returns (function) iterator function
Example
Iterates over all lines of a file <syntaxhighlight lang="lua"> for line in io.lines(filename) do -- body end </source>
