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Comment by moonboots | Hacker News Reader

I still prefer a simple shell script for these use cases. Here's a snippet for the translated file size calculation:

  translated_files=$(grep "todavida no ha sido traducida" *)
  total_size=$(du --summarize . | cut -f 1)
  translated_file_size=$(du --summarize --total $(echo translated_files) | tail -n 1 | cut -f 1)
  echo "translated size: ${translated_file_size}KB/${total_size}KB $(($translated_file_size/$total_size))%"

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Two nitpicks: grep by default returns lines that match, not files, you need the '-l' option; and you're passing the string "translated_files" to du instead of the actual files, you need just $translated_files instead of the echo.

And that breaks with files with spaces on them, which is a bane of shell scripts.

By the way, in Python:

    import os
    total_size = sum([os.path.getsize(filename) for filename in os.listdir('.')])
    matches = [match for match in os.listdir('.') if "todavida no ha sido traducida" in open(match).read()]
    translated_file_size = sum([os.path.getsize(filename) for filename in matches])
    print "translated size: %dKB/%dKB %d" % (translated_file_size, total_size, translated_file_size / total_size)

Good catches

The spaces in filenames can be handled by having grep and du communicate with null delimited strings instead of newline delimited, e.g.

  grep --files-with-matches --null "todavida..." *
  du --summarize --total --files-from=<($(echo $translated_file_size))

I find that much more elegant; four lines of bash script which would run on nearly any Unix-like system, versus 49 (or a bit less if you drop the whitespace) of Scala, which won't. Even the shebang is three lines instead of one!

I guess this example is nice as an introduction to Scala, but it doesn't seem like Scala is a particularly appropriate replacement for any of the things one would normally use a shell script for.

> which would run on nearly any Unix-like system

Did you mean on nearly any Unix-like system which has the output of du in the same format as the one on your machine? I don't believe those can be treated as standard if you want any kind of portability.

Okay, I'm not an expert on variations between different Unices, that may well be the case. The point I was trying to make was more that it would run without having to install a great wodge of Java/Scala dependencies which aren't on most systems by default.

Why wouldn't it run on any unix, linux, or windows, or wherever a JVM can run? you should run it with "scala status.scala"

apart from that, I came to a similar conclusion: http://playlatam.wordpress.com/2012/01/13/first-steps-with-s...

thanks for the tip, here's my bash version http://playlatam.wordpress.com/2012/01/13/first-steps-with-s...

yeap, python is pretty cool, see http://playlatam.wordpress.com/2012/01/13/first-steps-with-s...

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