flush
flush — flushes any pending output on a file or string.
Arguments
- file
- A file pointer to a previously opened
file. This may be either a file in the file system,
or a string opened for read and
write.
Description
This function flushes any pending output on the file or
string. This has the effect of printing output on the
screen or updating a file on disk in the case of a file.
flush has no effect on strings.
flush is called automatically by
close.
Example
Gamma> fp=open("myflushfile.dat","w",nil);
#<File:"myflushfile.dat">
Gamma> write(fp, "I am written.");
t
Gamma> fp=open("myflushfile.dat","r",nil);
#<File:"myflushfile.dat">
Gamma> read_line(fp);
"Unexpected end of file"
Gamma> fp=open("myflushfile.dat","w",nil);
#<File:"myflushfile.dat">
Gamma> write(fp, "I am written.");
t
Gamma> flush(fp);
t
Gamma> fp=open("myflushfile.dat","r",nil);
#<File:"myflushfile.dat">
Gamma> read_line(fp);
"\"I am written.\""
Gamma>
