This chapter is from the book
This chapter is from the book
This chapter is from the book
Workshop
Quiz
To open a file named data for writing, you should use which of the following:
open(FH, "data", write);
open(FH, "data"); and simply print to FH
open(FH, ">data") || die "Cannot open data: $!";
(-M $file > 1 and -s $file) is true if
$file has been modified more than one day ago and has data.
That expression cannot be true.
$file is writeable and has no data.
Answers
c. Choice a is false because this is not how open opens a file for writing; b is false because it opens the filehandle only for reading. Choice c is true because it does what is asked—and uses good form by checking for errors.
a. –M returns the number of days old a file is (>1 is more than 1 day), and –s returns true if the file has data in it.
Activities
Modify the Hangman program from Hour 4, "Stacking Building Blocks: Lists and Arrays," to take the list of possible words from a data file.