How Ruby is beating Python in the battle for the Soul of System Administration

Re:How Ruby is beating Python in the battle for the Soul of ... by nabb on Monday October 03, 2011 @08:16AM (#3065979)

tail can be done in ruby can be quite succinctly with the $< (ARGF) variable:

  ruby -e'$><<$<.map.last(10)'

For the rest of the ruby one-liners in the page the author references, most can be done more easily with standard command line tools (although most people aren't well-versed in sed, so 'ruby -pe puts' might be better than 'sed G').

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Re:How Ruby is beating Python in the battle for the Soul of ... by viraptor on Monday October 03, 2011 @09:23AM (#3066154)

There's one big problem with code like that. If you're doing devops-y stuff, then you really, really don't want to debug something like that when your pager goes off at 3am. The cleaner the solution the better, because after you wake up `$><<$<` is just a blurred thing with no meaning...

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Re:How Ruby is beating Python in the battle for the Soul of ... by davnola on Monday October 03, 2011 @09:35AM (#3066196)

Cool. That hurts my eyes.

    ruby -e "print ARGF.readlines.last(10)"

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Re:How Ruby is beating Python in the battle for the Soul of ... by rytis on Monday October 03, 2011 @10:21AM (#3066355)

on, say, a 5GB log file?..

If I read this correctly (http://www.ruby-doc.org/core/classes/IO.html#M000914) it'll read the whole file into an array, then spit out last 10 entries?

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Re:How Ruby is beating Python in the battle for the Soul of ... by davnola on Monday October 03, 2011 @12:09PM (#3066809)

Yes it does - good point, but the sigil-tastic snippet in the parent reads the whole file into an array, too - it's just harder to tell.

Plus the parent snippet is not Ruby 1.9 compatible.

Anyways, my version was just to illustrate that sysadmin scripting in Ruby does not have illegible.

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