SameShirtEveryDay.com

Converts a string to a URL style permalink.

class String
  def to_permalink
    s = self
    s = Iconv.iconv('ascii//ignore//translit', 'utf-8', s).to_s
    s.gsub!(/^\W+|\W+$/, '')
    s.gsub!(/\W+/, '-')
    s.strip!
    s.downcase!
    s.squeeze!(' ')
    s.gsub(/\ +/, '-')
  end
end

Unindenting a block of text involves finding a common minimum indent in every line and removing it. Here’s how I have done it. As with any text processing, the larger the text is, the slower it is.

def unindent_text(src)
  indents = []

  src.each_line do |line|
    indents < < $1.length if not line =~ /^\s*$/ and line =~ /^(\s+)/
  end

  indent = indents.min
  return src if indent == 0

  lines = []

  src.each_line do |line|
    lines << line.gsub(/^\s{#{indent}}/, '').gsub(/(\r\n|\n|\r)$/, '')
  end

  lines.join("\n")
end

If you are suddenly getting in `latest_partials': undefined method `[]' for nil:NilClass error when calling some gem methods like Gem.latest_load_paths or Gem.path, check your gems folder (on a PC it’s /Ruby/lib/ruby/gems/1.8/gems). Make sure there are no foreign folders or files in there. Rubygems expects all folders to be in <name>-<version> format.

Maybe it’s just me and I don’t know where to look, but this isn’t something I’m interested in spending 30 minutes looking for.

module Math
  def self.max(a, b)
    a > b ? a : b
  end

  def self.min(a, b)
    a < b ? a : b
  end
end