count_code_lines.sh

#!/bin/sh

find project/ -name '*.cs' -or -name '*.js' | \
  awk '{ \
    cmd = "wc -l "$0; \
    cmd | getline res; \
    split(res, n, " "); \
    print n[1]; \
    close(cmd) \
  }' | paste -s -d'+' - | bc