similar to: Determine image width of png, gif or jpg?

Hi friends in PHP there is a direct function GetImageSize(), with it I can easily determine the dimentions of an image file. How can I do in RoR. Please help me out Thanks in advance -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060505/13ba1640/attachment.html

I''m trying to figure out how to determine the width and height of images that are uploaded through my app. Either from the posted data or the file I save to disk. I''ve been searching around for info but no luck; I''m completely at a loss. Any suggestions or pointers would be great. Project background: The site is an artists portfolio site. The images are thumbnails

Hello Rubyists, I need to generate barcodes (in UPC and codabar symbologies) and would like to know if anyone has done this with Ruby. From what I can tell, it would be possible to use the gnu-barcode [1] or barcodewriter [2] to generate a PostScript, then through RMagick (via GhostScript) take the file and create a GIF/JPG. These will really only be used for web display (to be printed

Dear mailing list members, Sorry for the repeated posting, but I have to add two more things. 1) I changed the .Rdata into .rdata in the subject to avoid misunderstanding of readers. 2) To save data in csv file; > write.csv(WV6_Data_R, "input/ch2/WV6_Data_R_v_2016_01_01.csv") Best regards, Yohei Tanaka ===========the following is the copy of my last message=========== A member

Hello. I''ve been trying this out for the past two days and I can''t seem to get it. I''m going to have a page where you can upload x amount of images at once. Lets say 10 images need to be uploaded, all with a caption. I''d like to have a browse button to choose the file, then the caption. Now, if I put 10 of them in one form, fill them all out and submit, I get

Dear mailing list members, A member found a problem of lines of codes in my last e-mail. I submit the correction to this mailing list as follows. In the final part of my last e-mail message, a csv file is created. But, I cannot open this file, so please ignore the following part. -------------------------------------------------------------------------------------------------- If you want to

Hi, all. I searched a lot at mailing list, installed EBImage and gtk packages, but I couldn't make this simple work: How to add a image file (jpg or bmp ou gif) to an existing plot window (not plot over the image), like the code below (pseudo function add.image): plot(1:10,1:10,main="test") image = read.X("myimage.jpg") add.image(image, x.left=2, y.bottom=4,

Hi, I'm re-posting this; the first post was filtered because I wasn't a member of the mailing list... I have a small diff for Vorbis which replaces some loops with memcpy. This allows us to take advantage of memcpy's optimisations when copying the floating point data. Does this look OK? - Michael Index: smallft.c ===================================================================

Hi to all I found an formular of an ** ***p-Value Calculator for the Chi-Square test* *http://www.danielsoper.com/statcalc/calc11.aspx* *with the formula* *http://www.danielsoper.com/statkb/topic11.aspx* *what's the gamma function of this formula in r?* *df=5* *ch2=25.50878* *the following code does not give the result <0.001 for the values above * *p=

Dear mailing list members, Thank you for all members who gave me advice. This question is solved. I tried to create an object using the load function by analogy based on the read.csv function like this; > d <- load("~/docdis/input/ch2/WV6_Data_R_v_2016_01_01.rdata") but, load function cannot be used in this way. Correct ways are; >

Dear R users, do you know an easy way (other than star plot) of making several points laying one over another visible? Is it any simple way of increasing such "multipoint" symbols - or shifting their positions randomly to make several points in one place visible? Cheers, sz. -- Szymon Drobniak || Population Ecology Group *Institute of Environmental Sciences, Jagiellonian University

Hi! Uhm are attributes just something like additional members of a class, other than those that come from the names of columns in the table? I''ve got images table, which has ''name'' column. I''ve added support for creating thumbnails out of uploaded pictures and i''d like to have an easy way of accessing them in my views. How to do it? I.e. my image

Hi all It like my visitors to be able to upload a zip file (or any other possible compressed file archive) to my server. After upload, my web app should extract the content to the server and delete the zip file. Is this possible somehow? I''m very thankful for help. Have a nice weekend, Joshua -- Posted via http://www.ruby-forum.com/.

Does anyone have a good working e-mail validator? or even some regexp to make the validates_format_of work right... that would be awesome. Also, maybe an online tutorial for regexp. i''ve always been afraid of it but i think it''s time to face the fears. thanks! -- Posted via http://www.ruby-forum.com/.

Hi all I have a Model like this: class Member < ActiveRecord::Base attr_accessible :username, :email, :first_name, :last_name end I have created a scaffold using script/generate scaffold member members Using the URL localhost:3000/members/edit/1 I can edit all attributes, including created_at, lock_version etc.! But it should only show the attributes I listed in attr_accessible! What

https://bugs.freedesktop.org/show_bug.cgi?id=111642 Bug ID: 111642 Summary: NV43 GeForce 6600 Nouveau is not stable on legacy hardware Product: xorg Version: unspecified Hardware: Other OS: All Status: NEW Severity: not set Priority: not set Component: Driver/nouveau

Hi! What is the easiest way to restrict access to some part of the page? In php i just put .htaccess and .htpasswd files in /admin folder and it worked. Now i''ve got one admin folder for controllers, one for views, public folder and i''m not really sure if it''s still possible. So what is the easiest way? I don''t have any user logging features on my site,

Hi all n = Nokogiri::HTML("<h1>H1</h1>") n.to_s # => <!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">\n<html><body><h1>H1</h1></body></html> Is there a method that only outputs the stuff I''ve read, and not the whole valid XHTML stuff?

Dear R-users, I have created a bunch of R scripts that automatically create multiple plots, all saved in a pdf device. I initially chose pdf output in order to easily access to multiple plots in a single file. Now, I am trying to play with different devices, like png or eps and I realize that the settings I used to have nice plots in a pdf device are giving awful outputs with the other

Hi! Previously i had ruby 1.8.2 (One-Click Ruby Installer) installed, but the rdoc and plugindoc didn''t work, so i decided to install ruby 1.8.4. I had uninstalled ruby 1.8.2 (uninstaller deleted the whole ruby folder with radrails and everything, just great) and installed One-Click Ruby Installer 1.8.4-16 preview3. Then installed rails, rmagick, radrails, created docs for trunk