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When to read the last line in a text stream?
Data read in from a text stream will necessarily compare equal to the data that were earlier written out to that stream only if: the data consist only of printing characters and the control characters horizontal tab and new-line; no new-line character is immediately preceded by space characters; and the last character is a new-line character.
When does read prompt for a continuation line?
If standard input is a terminal device and the invoking shell is interactive, read shall prompt for a continuation line when it reads an input line ending with a , unless the -r option is specified.
When does a text file end with a new line?
The C standard says that text files must end with a newline or the data after the last newline may not be read properly. A text stream is an ordered sequence of characters composed into lines, each line consisting of zero or more characters plus a terminating new-line character.
What happens if the last line of an input file ends with a backslash?
This occurs if the last line of the input file ends with a . It is for this reason that “if any” is used in “The terminating (if any) shall be removed from the input” in the description. It is not a relaxation of the requirement for standard input to be a text file.
How to read last n lines of a file in Python?
Given a text file fname, a number N, the task is to read the last N lines of the file. As we know, Python provides multiple in-built features and modules for handling files. Let’s discuss different ways to read last N lines of a file using Python.
Is it possible to read input stream with bufferedread?
It is possible to read input stream with BufferedReader and with Scanner. If you don’t have a good reason,it is better to use BufferedRead (for broad discussion BufferedReader vs Scanner see.
Why is the last line of the script never seen?
We could run the script from the command line and it would see every line in the file, including the last one, just fine. However, when run by the automated process (which runs the script that generates the DATAFILE just prior to the script in question), the last line is never seen.
How to find the last line of a file?
I need to find the line and then process it into a SQL database… I’ve been reading around and scouring the web but am battling to find the proper way to do this. I.e.: Find last line of file. Process last line of file. I hope this makes sense. There are two ways: simple and inefficient, or horrendously complicated but efficient.