Count the number of lines in a text file

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[edit] Implementations

[edit] Perl


my $line_count = 0;

open my $fh, '<', $filename or die qq{Cannot open "$filename": $!};

while ( sysread $fh, my $buffer, 4096 ) {
        $line_count += ($buffer =~ tr/\n//);
}

close $fh;

Original Source: Perl documentation (perlfaq5)


[edit] PHP

Extremely simple PHP sample to count and return the number of lines in a text file. The output can be customized to suit your own requirements. 


<?php
$file = "somefile.txt";
$lines = count(file($file));
echo "There are $lines lines in $file";
?>

[edit] Python


filename = "somefile.txt"
myfile = open(filename)
lines = len(myfile.readlines())
print "There are %d lines in %s" % (lines, filename)

[edit] Ruby

filename = "somefile.txt"
count = IO.readlines(filename).size
puts "There are #{count} lines in #{filename}";

[edit] Java


import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.io.StreamTokenizer;

public class ReadFile {
        public static int countLines(final String filename) {
                StreamTokenizer st = null;
                Reader reader = null;
                try {
                        reader = new BufferedReader(new FileReader(filename));
                        st = new StreamTokenizer(reader);
                        while (st.nextToken() != StreamTokenizer.TT_EOF) {
                        }
                } catch (final IOException ioe) {
                        System.err.println("IOException occurred:");
                        ioe.printStackTrace();
                } finally {
                        try {
                                reader.close();
                        } catch (final IOException ignored) {
                                // deliberately ignored
                        }
                }
                return st.lineno();
        }

        public static void main(final String arrrggghh[]) {
                final int lines = ReadFile.countLines("/Cucu_Video_log.txt");
                System.out.println("file has " + lines + " lines in it");
        }
}

[edit] Rexx


/* Count the number of lines in a file
and store them in a stem
*/
Parse Arg File
i=1
time1=Time("E")
time1=Time("R")
Do While LINES(file)
Data.i=LINEIN(file)
i=i+1
End
time2=Time("E")
ET=Time2-Time1
Say "It took" ET "seconds to read the file."
Say "There were" i-1 "lines in" file
Exit
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