Why can't I do a "to_i?"

ruby-talk
1

Hello,
I keep getting an "undefined method `to_f'" for this simple script. Can
someone help me? I'm interrogating jpeg graphics files and I need to log
their widths and depths, in picas.
Thanks a lot,
Peter

Dir.chdir("T:/ioma/temp")
Dir.glob("*.jpg").each do |file|
fileinfo = `alchemy #{file} -x`
filewidth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[1]/)
filedepth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[2]/)
fileres = fileinfo.match(/Dots per inch: [0-9]{1,5}/)

newfilewidth = (filewidth.to_f / 200) * 6
newfiledepth = (filedepth.to_f / 200) * 6

File.open("t:/ioma/iomafiles.log", "a") { |f| f.print "#{file} width:
#{newfilewidth.to_f.round} depth: #{newfiledepth.to_f.round}\n" }
end

···

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2

Sorry. I meant a "to_f" there in the subject line, although it happens
with to_i, too.

Peter Bailey wrote:

···

Hello,
I keep getting an "undefined method `to_f'" for this simple script. Can
someone help me? I'm interrogating jpeg graphics files and I need to log
their widths and depths, in picas.
Thanks a lot,
Peter

Dir.chdir("T:/ioma/temp")
Dir.glob("*.jpg").each do |file|
fileinfo = `alchemy #{file} -x`
filewidth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[1]/)
filedepth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[2]/)
fileres = fileinfo.match(/Dots per inch: [0-9]{1,5}/)

newfilewidth = (filewidth.to_f / 200) * 6
newfiledepth = (filedepth.to_f / 200) * 6

File.open("t:/ioma/iomafiles.log", "a") { |f| f.print "#{file} width:
#{newfilewidth.to_f.round} depth: #{newfiledepth.to_f.round}\n" }
end

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3

Maybe move [1] and [2] outside the regexps?

Peter

···

On Wed, May 5, 2010 at 2:45 PM, Peter Bailey <pbailey@bna.com> wrote:

Hello,
I keep getting an "undefined method `to_f'" for this simple script. Can
someone help me? I'm interrogating jpeg graphics files and I need to log
their widths and depths, in picas.
Thanks a lot,
Peter

Dir.chdir("T:/ioma/temp")
Dir.glob("*.jpg").each do |file|
fileinfo = `alchemy #{file} -x`
filewidth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[1]/)
filedepth = fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[2]/)
fileres = fileinfo.match(/Dots per inch: [0-9]{1,5}/)

4

to_f occurs on three lines in the code you show us. How about a clue as to
which line the error belongs to?

5

Calamitas wrote:

···

On Wed, May 5, 2010 at 2:45 PM, Peter Bailey <pbailey@bna.com> wrote:

�filewidth � � � �= fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[1]/)
�filedepth � � � �= fileinfo.match(/Width x Height: ([0-9]{1,5}) x
([0-9]{1,5})[2]/)
�fileres � � � �= fileinfo.match(/Dots per inch: [0-9]{1,5}/)

Maybe move [1] and [2] outside the regexps?

Peter

Yes, thanks. I found the problem. It's the placement of my [1] and [2]
there at the end of the lines.

Thanks for your responses.
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