In C or C++, it’s can be a pain to get thousands separators in printf. In ruby, it can be trivial, as long as you use the right libraries. If you have
ActiveSupport installed (which I believe comes with Rails), you’re all set. Note that you don’t have to be using Rails; this will work in a plain ruby script.
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number_with_delimiter is great, and
number_to_human is a nice bonus.
For the record, software versions and the install command:
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