Class: String

Inherits:
Object show all
Defined in:
lib/ruby/blank.rb,
lib/ruby/string.rb

Instance Method Summary collapse

Instance Method Details

#blank? ⇒ Boolean

A string is blank if it’s empty or contains whitespaces only:

"".blank?                 # => true
"   ".blank?              # => true
" something here ".blank? # => false

Returns:

  • (Boolean) 


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# File 'lib/ruby/blank.rb', line 118

def blank?
  self !~ /\S/
end

#camelize ⇒ Object 



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# File 'lib/ruby/string.rb', line 11

def camelize
  self.gsub(/\/(.?)/) { "::" + $1.upcase }.
  gsub(/(^|_|-)(.)/) { $2.upcase }
end

#ensure_ends_with(fragment) ⇒ Object 



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# File 'lib/ruby/string.rb', line 16

def ensure_ends_with(fragment)
  end_with?(fragment) ? self.dup : self + fragment
end

#ensure_starts_with(fragment) ⇒ Object 



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# File 'lib/ruby/string.rb', line 20

def ensure_starts_with(fragment)
  start_with?(fragment) ? self.dup : fragment + self
end

#margin ⇒ String

Remove whitespace margin.

Returns:

  • (String) —

    receiver with whitespace margin removed



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# File 'lib/ruby/string.rb', line 30

def margin
  lines = self.dup.split($/)

  min_margin = 0
  lines.each do |line|
    if line =~ /^(\s+)/ && (min_margin == 0 || $1.size < min_margin)
      min_margin = $1.size
    end
  end
  lines.map { |line| line.sub(/^\s{#{min_margin}}/, '') }.join($/)
end

#underscore ⇒ Object 



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# File 'lib/ruby/string.rb', line 3

def underscore
  self.gsub(/::/, '/').
  gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
  gsub(/([a-z\d])([A-Z])/,'\1_\2').
  tr("-", "_").
  downcase
end