Skipping Lines When Reading Files In Ruby
Posted by Weston Ganger
I needed to read a ruby file but I wanted to skip the first and last lines in it.
Here are a few different methods.
# BEST METHOD, using a range, skips first and last line File.readlines(myfile.rb)[1..-2].each do |line| puts line end # using drop, skips first line File.readlines(myfile.rb).drop(1).each do |line| puts line end # using enumerator, skips first line File.readlines(myfile.rb).each do |file, w| lines = file.lines # an enumerator lines.next #skips first line lines.each do |line| puts line end end
I was using it for the prawn gem, because I had .pdf.prawn files that I was rendering from controller actions that required the first and last line, but I was also concatenating pdf’s in a different method that had to have the first and last lines in the method not the file.
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