Class: String

Inherits:
Object show all
Defined in:
lib/libis/tools/extend/string.rb

Overview

Extension class

Instance Method Summary collapse

Instance Method Details

#align_left ⇒ Object

Align a multi-line string to the left by removing as much spaces from the left as possible.



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# File 'lib/libis/tools/extend/string.rb', line 73

def align_left
  string = dup
  relevant_lines = string.split(/\r\n|\r|\n/).select { |line| line.size > 0 }
  indentation_levels = relevant_lines.map do |line|
    match = line.match(/^( +)[^ ]+/)
    match ? match[1].size : 0
  end
  indentation_level = indentation_levels.min
  string.gsub! /^#{' ' * indentation_level}/, '' if indentation_level > 0
  string
end

#blank? ⇒ Boolean

Check if string is empty

Returns:

  • (Boolean) 


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# File 'lib/libis/tools/extend/string.rb', line 7

def blank?
  self == ''
end

#decode_visual ⇒ Object

Convert all not-printable characters encoded in hex format back to original



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# File 'lib/libis/tools/extend/string.rb', line 68

def decode_visual
  self.gsub(/_x([0-9a-f]{4})_/i) { [$1.to_i(16)].pack('U') }
end

#dot_net_clean ⇒ Object 



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# File 'lib/libis/tools/extend/string.rb', line 52

def dot_net_clean
  self.gsub /^(\d+|error|float|string);\\?#/, ''
end

#encode_visual(regex = nil) ⇒ Object

Escape all not-printabe characters in hex format



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# File 'lib/libis/tools/extend/string.rb', line 62

def encode_visual(regex = nil)
  regex ||= /\W/
  self.gsub(regex) { |c| '_x' + '%04x' % c.unpack('U')[0] + '_'}
end

#escape_for_cmd ⇒ Object

Escape double quotes for usage in passing through scripts



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# File 'lib/libis/tools/extend/string.rb', line 43

def escape_for_cmd
  self.gsub(/"/) { |s| '\\\\\\' + s[0].to_s }
end

#escape_for_regexp ⇒ Object

Escape string for use in Regular Expressions



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# File 'lib/libis/tools/extend/string.rb', line 33

def escape_for_regexp
  self.gsub(/[\.\+\*\(\)\{\}\|\/\\\^\$"']/) { |s| '\\' + s[0].to_s }
end

#escape_for_sql ⇒ Object

Escape single quotes for usage in SQL statements



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# File 'lib/libis/tools/extend/string.rb', line 48

def escape_for_sql
  self.gsub(/'/) { |s| ($` == '' || $' == '' ? '' : '\'') + s[0].to_s }
end

#escape_for_string ⇒ Object

Escape double quotes for usage in code strings.



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# File 'lib/libis/tools/extend/string.rb', line 38

def escape_for_string
  self.gsub(/"/) { |s| '\\' + s[0].to_s }
end

#quote ⇒ Object

Quote string for command-line use.



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# File 'lib/libis/tools/extend/string.rb', line 28

def quote
  '\"' + self.gsub(/"/) { |s| '\\' + s[0] } + '\"'
end

#remove_whitespace ⇒ Object

Convert whitespace into underscores



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# File 'lib/libis/tools/extend/string.rb', line 57

def remove_whitespace
  self.gsub(/\s/, '_')
end

#sort_form ⇒ Object

Create sortable object from string. Supports better natural sorting.



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# File 'lib/libis/tools/extend/string.rb', line 12

def sort_form
  result = []
  matcher = /^(\D*)(\d*)(.*)$/
  self.split('.').each { |s|
    while !s.empty? and (x = matcher.match s)
      a = x[1].to_s.strip
      b = a.gsub(/[ _]/, '')
      result << [b.downcase, b, a]
      result << x[2].to_i
      s = x[3]
    end
  }
  result
end