Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/string_tools/core_ext/string.rb

Constant Summary collapse

ANSI_CLEAR =

Embed in a String to clear all previous ANSI sequences.

"\e[0m"
ANSI_BOLD = 
"\e[1m"
ANSI_UNDERLINE = 
"\e[4m"
BLACK =

Colors

"\e[30m"
RED = 
"\e[31m"
GREEN = 
"\e[32m"
YELLOW = 
"\e[33m"
BLUE = 
"\e[34m"
MAGENTA = 
"\e[35m"
CYAN = 
"\e[36m"
WHITE = 
"\e[37m"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.natcmp(str1, str2) ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 44

def self.natcmp(str1, str2)
  str1, str2 = str1.dup, str2.dup
  compare_expression = /^(\D*)((?:\d+(?:\.\d+)?)*)(.*)$/

  # Remove all whitespace
  str1.gsub!(/\s*/, '')
  str2.gsub!(/\s*/, '')

  while (str1.length > 0) or (str2.length > 0)
    # Extract non-digits, digits and rest of string
    str1 =~ compare_expression
    chars1, num1, str1 = $1.dup, $2.dup, $3.dup

    str2 =~ compare_expression
    chars2, num2, str2 = $1.dup, $2.dup, $3.dup

    # Compare the non-digits
    case (chars1 <=> chars2)
    when 0 # Non-digits are the same, compare the digits...
      # If either number begins with a zero, then compare alphabetically,
      # otherwise compare numerically
      if !(num1[0] == 48 && num1[1] != 46) and !(num2[0] == 48 && num2[1] != 46)
        num1, num2 = num1.to_f, num2.to_f
      end

      case (num1 <=> num2)
      when -1 then return -1
      when 1 then return 1
      end
    when -1 then return -1
    when 1 then return 1
    end # case

  end # while

  # Strings are naturally equal
  0
end

Instance Method Details

#bold ⇒ Object

Synopsys

Make text bolder (for ASCII terminals)



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# File 'lib/string_tools/core_ext/string.rb', line 136

def bold
  surround_with_ansi(ANSI_BOLD)
end

#colorize(color, bold_or_options = nil) ⇒ Object

Synopsys

Colorize string (for terminals)
Does not work with sprintf yet

Usage

"ln -s".colorize(:red)

Args

+color+ - symbol, one of the following (black, white, red, green, yellow, blue, magenta, cyan)
+bold_or_options+ - True/False or Hash



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# File 'lib/string_tools/core_ext/string.rb', line 113

def colorize(color, bold_or_options = nil)
  is_bold      = bold_or_options.is_a?(TrueClass)
  is_underline = false

  if bold_or_options.is_a?(Hash)
    is_bold    ||= bold_or_options[:bold]
    is_underline = bold_or_options[:underline]
  end

  raise ArgumentError('Color must be a symbol') unless color.is_a?(Symbol)
  color_const = color.to_s.upcase.to_sym

  raise ArgumentError('Unknown color') unless self.class.const_defined?(color_const)
  ascii_color = self.class.const_get(color_const)

  s = surround_with_ansi(ascii_color)
  s = s.bold      if is_bold
  s = s.underline if is_underline
  s
end

#detect_encoding ⇒ Object

shorthand



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# File 'lib/string_tools/core_ext/string.rb', line 159

def detect_encoding
  e = ::CharDet.detect(self)["encoding"]
  e = 'windows-1251' if StringTools.cp1251_compatible_encodings.include?(e)
  e
end

#mb_downcase ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 197

def mb_downcase
  # https://github.com/rails/rails/commit/393e19e508a08ede0f5037bccb984e3eb252d579
  if ActiveSupport::VERSION::STRING >= '4.0.0' && ActiveSupport::VERSION::STRING <= '4.2.0'
    ActiveSupport::Multibyte::Unicode.send(:database).codepoints
  end

  mb_chars.downcase.to_s
end

#naturalized ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 40

def naturalized
  scan(/[^\d\.]+|[\d\.]+/).map{|f| f.match(/^\d+(\.\d+)?$/) ? f.to_f : f }
end

#remove_colors ⇒ Object

Synopsys

remove colors from colorized string



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# File 'lib/string_tools/core_ext/string.rb', line 148

def remove_colors
  gsub(/\e\[\d+m/, '')
end

#strip_tags ⇒ Object

возвращает строку из которой удалены HTML-теги символы <>&“ остаются без изменения



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# File 'lib/string_tools/core_ext/string.rb', line 21

def strip_tags
  ActionController::Base.helpers.strip_tags(self).to_str.gsub(/<!--/, '<--')
end

#to_b ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 32

def to_b
  ActiveRecord::ConnectionAdapters::Column.value_to_boolean(self) || false
end

#to_cp1251 ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 187

def to_cp1251
  encode 'cp1251', :undef => :replace, :invalid => :replace
rescue
  ''
end

#to_cp1251! ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 193

def to_cp1251!
  self.replace(self.to_cp1251)
end

#to_f_with_strip_comma ⇒ Object

‘11,3’.to_f

> 11.3



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# File 'lib/string_tools/core_ext/string.rb', line 27

def to_f_with_strip_comma
  self.gsub(/,/,'.').to_f_without_strip_comma
end

#to_punycode ⇒ Object

Выполняет преобразование строки в punycode.



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# File 'lib/string_tools/core_ext/string.rb', line 84

def to_punycode
  Addressable::URI.parse(self).normalize.to_s
end

#to_script_safe_json ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 36

def to_script_safe_json
  self.to_json.gsub('</script>', '</" + "script>" + "')
end

#to_utf8 ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 169

def to_utf8
  # и так utf
  return self if is_utf8?

  enc = detect_encoding

  # если utf или английские буквы, то тоже ок
  return self if ['utf-8', 'ascii'].include?(enc)

  # если неизвестная каша, то возвращаем пустую строку
  return '' if enc.nil?

  # иначе пытаемся перекодировать
  encode 'utf-8', enc, :undef => :replace, :invalid => :replace
rescue
  ''
end

#to_utf8! ⇒ Object 



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# File 'lib/string_tools/core_ext/string.rb', line 165

def to_utf8!
  self.replace(self.to_utf8)
end

#underline ⇒ Object

Synopsys

Make text underlined (for ASCII terminals)



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# File 'lib/string_tools/core_ext/string.rb', line 142

def underline
  surround_with_ansi(ANSI_UNDERLINE)
end