count (non-blank) lines-of-code in bash

cat foo.c | sed '/^s*$/d' | wc -l

cat foo.pl | sed '/^s*#/d;/^s*$/d' | wc -l

#!/bin/bash
find . -path './pma' -prune -o -path './blog' -prune -o -path './punbb' -prune -o -path './js/3rdparty' -prune -o -print | egrep '.php|.as|.sql|.css|.js' | grep -v '.svn' | xargs cat | sed '/^s*$/d' | wc -l

grep -cve '^s*$' <file>

$ grep -cve '^s*$' *.hh

config.hh:36
exceptions.hh:48
layer.hh:52
main.hh:39

cat 'filename' | grep '[^ ]' | wc -l

wc *.py

grep -v '^W*$' *.py | wc

awk '/^[[:space:]]*$/ {++x} END {print x}' "$testfile"

grep -c '.' <list of files>

grep -c '.' `find -type f`

grep -v '^W*$' `find -type f` | grep -c '.' > /path/to/lineCountFile.txt

#!/usr/bin/env bash
(
echo 0;
for ext in "$@"; do
    for i in $(find . -name "*$ext"); do
        sed '/^s*$/d' $i | wc -l ## skip blank lines
        #cat $i | wc -l; ## count all lines
        echo +;
    done
done
echo p q;
) | dc;

./countlines.sh .py .java .html