I need to format an integer representation of bytes into something friendly, and I'm hoping that there's a utility function in Ruby or in Rails that will do that formatting for me (to perpetuate my laziness, of course.)
I'm looking for something that would look like:
format_bytes(1024) -> "1 KB"
format_bytes(1048576) -> "1 MB"
Looks like there's some stuff in ActiveSupport to do it the other way around, but I haven't found a way to do it in this direction.
If there isn't one that exists, does anyone have a particularly elegant solution?
Number to human size is what you're looking for.
require 'action_view'
include ActionView::Helpers::NumberHelper
number_to_human_size(123) # => 123 Bytes
number_to_human_size(1234) # => 1.2 KB
number_to_human_size(12345) # => 12.1 KB
number_to_human_size(1234567) # => 1.2 MB
number_to_human_size(1234567890) # => 1.1 GB
number_to_human_size(1234567890123) # => 1.1 TB
number_to_human_size(1234567, :precision => 2) # => 1.18 MB
number_to_human_size(483989, :precision => 0) # => 473 KB
number_to_human_size(1234567, :precision => 2, :separator => ',') # => 1,18 MB