Class: String

Inherits:
Object show all
Defined in:
lib/doh/core/string.rb

Instance Method Summary collapse

Instance Method Details

#after(substr) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 6

def after(substr)
  loc = index(substr)
  return nil if loc.nil?
  mid(loc + substr.size)
end

#before(substr) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 18

def before(substr)
  loc = index(substr)
  return nil if loc.nil?
  firstn(loc)
end

#equals_ignore_whitespace(str2) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 66

def equals_ignore_whitespace(str2)
  self.normalize_all_whitespace == str2.normalize_all_whitespace
end

#firstn(limit) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 30

def firstn(limit)
  return nil if limit < 0
  return '' if limit == 0
  slice(Range.new(0, limit -1))
end

#gsub_between(beginstr, endstr, replace_str = nil) ⇒ Object

replaces with replace_str, or yields (and replaces with the returned value) the values found between each occurance of beginstr and endstr within the string an assumption is made that the string data between ‘beginstr’ and ‘endstr’ will not have either delimiter within it if it does, the result is undefined right now



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# File 'lib/doh/core/string.rb', line 46

def gsub_between(beginstr, endstr, replace_str = nil)
  curpos = 0
  result = self.dup
  while true
    begpos = result.index(beginstr, curpos)
    endpos = result.index(endstr, begpos + beginstr.length) if begpos
    if begpos && endpos
      use_str = replace_str
      if !replace_str
        use_str = yield(result[(begpos+beginstr.length)..(endpos-1)])
      end
      result[(begpos+beginstr.length)..(endpos-1)] = use_str
      curpos = begpos + beginstr.length + endstr.length + use_str.length
    else
      break
    end
  end
  result
end

#hex_decode ⇒ Object 



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# File 'lib/doh/core/string.rb', line 85

def hex_decode
  raise 'invalid hex string length' if (self.length % 2) != 0
  byte_array = []
  upcase.chars.each_slice(2) do |slice|
    byte_array.push(hex_to_int(slice[0].getbyte(0))*16 + hex_to_int(slice[1].getbyte(0)))
  end
  byte_array.pack('c*')
end

#hex_encode ⇒ Object 



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# File 'lib/doh/core/string.rb', line 79

def hex_encode
  bytes.to_a.collect do |byte|
    "%02x" % byte
  end.join
end

#lastn(limit) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 36

def lastn(limit)
  return nil if limit < 0
  return '' if limit == 0
  slice(Range.new(-limit, -1)) || self
end

#mid(first, count = nil) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 2

def mid(first, count = nil)
  slice(first, count || (size - first))
end

#normalize_all_whitespace ⇒ Object

this method strips the string, then combines all whitespace > 1 character into a single space



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# File 'lib/doh/core/string.rb', line 71

def normalize_all_whitespace
  result = self.strip.gsub("\n", ' ').gsub("\t", ' ')
  while match = result.match(/\s\s/)
    result = match.pre_match + ' ' + match.post_match
  end
  result
end

#rafter(substr) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 12

def rafter(substr)
  loc = rindex(substr)
  return nil if loc.nil?
  mid(loc + substr.size)
end

#rbefore(substr) ⇒ Object 



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# File 'lib/doh/core/string.rb', line 24

def rbefore(substr)
  loc = rindex(substr)
  return nil if loc.nil?
  firstn(loc)
end