UNIX/Linux Bash Shell Scripting: How to Read a File Line by Line in a Shell Script while loop reads one line of text at a time.But the beginning of this script does a little file descriptor redirection. The first exec comm-and redirects stdin to file descriptor 3. The second exec command red-irects the $FILENAME file into stdin, which i
How do you read from stdin in Python? - Stack Overflow Building on all the anwers using sys.stdin, you can also do something like the following to read from an argument file if at least one argument exists, and fall back to stdin otherwise: import sys f = sys.stdin if len(sys.argv) > 1: f = open(sys.argv[1])
Programmatically read from STDIN or input file in Perl - Stack Overflow -1 since foreach will slurp the whole file. Better to assign to the line in a while loop. Furthermore, Perl has built-in magical behavior for bare angle brackets, so you should have said while(my $line = ). Then no redirection is necessary. – David Merten
PHP: I/O streams - Manual - PHP: Hypertext Preprocessor The following code shows how to test for input on STDIN. In this case, we were looking for CSV data, so we use fgetcsv to read STDIN, if it creates an array, we assume CVS input on STDIN, if no array was created, we assume there's no input from STDIN, and
Standard streams - Wikipedia, the free encyclopedia Users generally know these streams as mediums by which text incoming from an input device and text outgoing to display are handled. As they are used for input and output ... public static void main (String [] args) {Scanner sc = new Scanner (System. in);
Redirecting Code Blocks - The Linux Documentation Project #!/bin/bash if [ -z "$1" ] then Filename=names.data # Default, if no filename specified. else Filename=$1 fi Savefile=$Filename.new # Filename to save results in. FinalName=Jonah # Name to terminate "read" on. line_count=`wc $Filename ...
Perl while statement - Miscellaneous Information about Perl Learn through examples how to use the Perl while statement with diamond operator, last, next and redo looping controls, arrays, hashes and much more. ... This first form is the general syntax of the Perl while statement. Here LABEL is optional and if pre
PHP: fgets - Manual - PHP: Hypertext Preprocessor See Also fgetss() - Gets line from file pointer and strip HTML tags fread() - Binary-safe file read fgetc() - Gets character from file pointer stream_get_line() - Gets line from stream resource up to a given delimiter fopen() - Opens file or URL popen() -
Stupid command-line trick: Counting the number of lines in stdin - The Old New Thing - Site Home - M On unix, you can use wc -l to count the number of lines in stdin. Windows doesn't come with wc, but there's a sneaky way to count the number of lines anyway: some-command-that-generates-output | find /c /v "" It is a special quirk of the find command that
Read a file line by line - Rosetta Code 1: #!/usr/local/bin/a68g --script # 2: 3: FILE foobar; 4: INT errno = open(foobar, "Read_a_file_line_by_line.a68", stand in channel); 5: 6: STRING line; 7: FORMAT line fmt = $gl$; 8: 9: PROC mount next tape = (REF FILE file)BOOL: ( 10: print("Please mount
