The split function will
break up a string according to a separator
and return the separated parts. The format is:
split( /separator/, $string );
For example,
$line = "Aki,1,1,0";
@line_items = split( /,/, $line ); # gives ("Aki", "1", "1", "0")
$line = "Ben,0,,0";
@line_items = split( /,/, $line ); # gives ("Ben", "0", "", "0")