By saving up output, it makes fewer expensive system calls. Perl normally buffers output so it doesn't make a system call for every bit of output. You might like to read Mark Jason Dominus's "Suffering From Buffering" at. # How do I flush/unbuffer an output filehandle? Why must I do this? This section deals with I/O and the "f" issues: filehandles, flushing, formats, and footers. Why do I get weird spaces when I print an array of lines?.How do I select a random line from a file?.Why does Perl let me delete read-only files? Why does -i clobber protected files? Isn't this a bug in Perl?.Why doesn't glob("*.*") get all the files?.Why can't I use "C:\temp\foo" in DOS paths? Why doesn't `C:\temp\foo.exe` work?.How do I close a file descriptor by number?.
#PERL FILE TIME STAMP UPDATE#
How do I randomly update a binary file?.All I want to do is append a small amount of text to the end of a file.I just want to increment the number in the file. Why can't I just open(FH, ">file.lock")?.How can I open a file named with a leading ">" or trailing blanks?.Why do I sometimes get an "Argument list too long" when I use ?.How come when I open a file read-write it wipes it out?.How can I translate tildes (~) in a filename?.How can I output my numbers with commas added?.How can I set up a footer format to be used with write()?.How can I open a filehandle to a string?.How can I make a filehandle local to a subroutine? How do I pass filehandles between subroutines? How do I make an array of filehandles?.How can I manipulate fixed-record-length files?.How can I use Perl's -i option from within a program?.How do I delete the last N lines from a file?.How do I count the number of lines in a file?.How do I change, delete, or insert a line in a file, or append to the beginning of a file?.How do I flush/unbuffer an output filehandle? Why must I do this?.
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