A bash/zsh function to easily extract pages from .pdf files using qpdf

pages_from_pdf.sh

# params: 
# $1 input-file path, 
# $2 page range (e.g., "1-1", "10-39", "5,9-12"), 
# $3 output-file path
# ex.: pages_from_pdf input.pdf "1,3,8-9" test.pdf
# qpdf should be installed
function pages_from_pdf() {
    qpdf $1 --pages $1 $2 -- $3    
}