str = 'file name_Width34.56_Height45.97_.jpg'

name, width, height, ext = str.split('_')
name << ext

width = width[5..-1]
height = height[6..-1]

puts name, width, height

--output:--
file name.jpg
34.56
45.97


> so we created a photoshop script that automatically creates the small
> version jpgs and inserts the original width height data to the name of
> the file.

Whoever wrote that script should be fired.

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