generating HTML tables

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September 19th, 2002, 12:43 AM

binaryencode

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Location: Weaverville, NC

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generating HTML tables

I am writing a Ruby script that outputs a table of pictures in its current directory. So far it goes like this:

Code:

#!/usr/bin/env ruby -w

html_file = File.open "pictures.html", "w"
html_file.puts(
  "<html>",
  "<head><title>The Cross Family Cross-Country Trip</title></head>",
  "<!--",
  "**************************************",
  "This file was generated by pictures.rb",
  "**************************************",
  "-->",
  "<body>",
  "<div align=center>",
   "<h2>.: Pictures :.</h2>",
  "<table border=0>",
  "<tr>"
)

# Sort pictures by modified date
pictures = Dir["*.{jpg,jpeg}"].sort do |a,b|
    File.mtime(a) <=> File.mtime(b)
end

for picture in pictures
    html_file.puts(
      "<td height=110 width=150>",
      "<a href=\"#{picture}\">",
      "<img height=100 length=140 src=\"#{picture}\" border=0></a>",
      "</td>"
    )
end
 
html_file.puts(
  "</table>",
  "</div><div align=right>",
  "This page was generated by a <a href=\"http://ruby-lang.org\">",
  "Ruby</a> script available <a href=\"pictures.rb\">here</a>.",
  "</div>",
  "</body>",
  "</html>"
)

My problem is that I need it to make a new row every 4 pictures or so, for it to fit in the browser. HOW?!

This has been giving me some trouble for the past couple of hours.

Thanks in Advance

September 19th, 2002, 01:55 AM

Scorpions4ever

Banned ;)

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Location: Glendale, Los Angeles County, California, USA

Posts: 7,507

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This is an algorithm forum more than a ruby forum, so I guess I'll try to explain an algorithm for how to do this first. How about using a variable (say count) to keep track of the number of files output so far. When the value is a multiple of 4, then print <tr> and </tr> at the beginning and end of the loop. Something like this, I guess (since I really can't program in ruby):

Code:

#!/usr/bin/env ruby -w

html_file = File.open "pictures.html", "w"
html_file.puts(
  "<html>",
  "<head><title>The Cross Family Cross-Country Trip</title></head>",
  "<!--",
  "**************************************",
  "This file was generated by pictures.rb",
  "**************************************",
  "-->",
  "<body>",
  "<div align=center>",
   "<h2>.: Pictures :.</h2>",
  "<table border=0>",
  "<tr>"
)

# Sort pictures by modified date
pictures = Dir["*.{jpg,jpeg}"].sort do |a,b|
    File.mtime(a) <=> File.mtime(b)
end

count = 1

for picture in pictures
    if (count % 4 == 0)
        html_file.puts(
            "<tr>"
        )
    html_file.puts(
      "<td height=110 width=150>",
      "<a href=\"#{picture}\">",
      "<img height=100 length=140 src=\"#{picture}\" border=0></a>",
      "</td>"
    )
    if (count % 4 == 0)
        html_file.puts(
            "</tr>"
        )
    count += 1
end
html_file.puts(
    "</tr>"
)
 
html_file.puts(
  "</table>",
  "</div><div align=right>",
  "This page was generated by a <a href=\"http://ruby-lang.org\">",
  "Ruby</a> script available <a href=\"pictures.rb\">here</a>.",
  "</div>",
  "</body>",
  "</html>"
)

September 19th, 2002, 02:54 AM

binaryencode

Junior Member

Join Date: Jun 2002

Location: Weaverville, NC

Posts: 2

Time spent in forums: < 1 sec
Reputation Power: 0

Thanks

Thanks, I ended up using that same consept in a hackish way of counting by the array index:

Code:

for picture in pictures
  html_file.puts(
    "<td height=110 width=150>",
    "<a href=\"#{picture}\">",
    "<img height=100 length=140 src=\"#{picture}\"   border=0></a>",
    "</td>"
   )

  # Create new row every four pictures
  while (pictures.index(picture)+1).divmod(4).last == 0
    html_file.puts "</tr>"
    html_file.puts "<tr>" until picture = pictures.last
  end
end

That is a lot uglier than most Ruby has to be, but a least my mind can rest now.

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