Class: String (Ruby mruby)

%(args) click to toggle source

 
               # File mrbgems/mruby-sprintf/mrblib/string.rb, line 2
def %(args)
  if args.is_a? Array
    sprintf(self, *args)
  else
    sprintf(self, args)
  end
end

__sub_replace(pre, m, post) click to toggle source

private method for gsub/sub

 
               # File mrblib/string.rb, line 55
def __sub_replace(pre, m, post)
  s = ""
  i = 0
  while j = index("\\", i)
    break if j == length-1
    t = case self[j+1]
        when "\\"
          "\\"
        when "`"
          pre
        when "&", "0"
          m
        when "'"
          post
        when "1", "2", "3", "4", "5", "6", "7", "8", "9"
          ""
        else
          self[j, 2]
        end
    s += self[i, j-i] + t
    i = j + 2
  end
  s + self[i, length-i]
end

casecmp(other_str) → -1, 0, +1 or nil click to toggle source

Case-insensitive version of String#<=>.

"abcdef".casecmp("abcde")     #=> 1
"aBcDeF".casecmp("abcdef")    #=> 0
"abcdef".casecmp("abcdefg")   #=> -1
"abcdef".casecmp("ABCDEF")    #=> 0

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 125
def casecmp(str)
  self.downcase <=> str.__to_str.downcase
rescue NoMethodError
  nil
end

casecmp?(other) → true, false, or nil click to toggle source

Returns true if str and other_str are equal after case folding, false if they are not equal, and nil if other_str is not a string.

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 138
def casecmp?(str)
  c = self.casecmp(str)
  return nil if c.nil?
  return c == 0
end

chars(&block) click to toggle source

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 302
def chars(&block)
  if block_given?
    self.split('').each do |i|
      block.call(i)
    end
    self
  else
    self.split('')
  end
end

clear → string click to toggle source

Makes string empty.

a = "abcde"
a.clear    #=> ""

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 12
def clear
  self.replace("")
end

codepoints(&block) click to toggle source

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 326
def codepoints(&block)
  len = self.size

  if block_given?
    self.split('').each do|x|
      block.call(x.ord)
    end
    self
  else
    self.split('').map{|x| x.ord}
  end
end

Also aliased as: each_codepoint

each_byte(&block) click to toggle source

Call the given block for each byte of self.

 
               # File mrblib/string.rb, line 194
def each_byte(&block)
  return to_enum(:each_byte, &block) unless block
  bytes = self.bytes
  pos = 0
  while pos < bytes.size
    block.call(bytes[pos])
    pos += 1
  end
  self
end

each_char(&block) click to toggle source

Call the given block for each character of self.

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 316
def each_char(&block)
  return to_enum :each_char unless block
  pos = 0
  while pos < self.size
    block.call(self[pos])
    pos += 1
  end
  self
end

each_codepoint(&block) click to toggle source

Alias for: codepoints

each_line(separator = "\n", &block) click to toggle source

Calls the given block for each line and pass the respective line.

ISO 15.2.10.5.15

 
               # File mrblib/string.rb, line 14
def each_line(separator = "\n", &block)
  return to_enum(:each_line, separator) unless block

  if separator.nil?
    block.call(self)
    return self
  end
  raise TypeError unless separator.is_a?(String)

  paragraph_mode = false
  if separator.empty?
    paragraph_mode = true
    separator = "\n\n"
  end
  start = 0
  string = dup
  self_len = length
  sep_len = separator.length
  should_yield_subclass_instances = self.class != String

  while (pointer = string.index(separator, start))
    pointer += sep_len
    pointer += 1 while paragraph_mode && string[pointer] == "\n"
    if should_yield_subclass_instances
      block.call(self.class.new(string[start, pointer - start]))
    else
      block.call(string[start, pointer - start])
    end
    start = pointer
  end
  return self if start == self_len

  if should_yield_subclass_instances
    block.call(self.class.new(string[start, self_len - start]))
  else
    block.call(string[start, self_len - start])
  end
  self
end

ext(newext='') click to toggle source

 
               # File minirake, line 15
def ext(newext='')
  return self.dup if ['.', '..'].include? self
  if newext != ''
    newext = (newext =~ /^\./) ? newext : ("." + newext)
  end
  self.chomp(File.extname(self)) << newext
end

gsub(*args, &block) click to toggle source

Replace all matches of pattern with replacement. Call block (if given) for each match and replace pattern with the value of the block. Return the final value.

ISO 15.2.10.5.18

 
               # File mrblib/string.rb, line 87
def gsub(*args, &block)
  return to_enum(:gsub, *args) if args.length == 1 && !block
  raise ArgumentError, "wrong number of arguments" unless (1..2).include?(args.length)

  pattern, replace = *args
  plen = pattern.length
  if args.length == 2 && block
    block = nil
  end
  if !replace.nil? || !block
    replace.__to_str
  end
  offset = 0
  result = []
  while found = index(pattern, offset)
    result << self[offset, found - offset]
    offset = found + plen
    result << if block
      block.call(pattern).to_s
    else
      replace.__sub_replace(self[0, found], pattern, self[offset..-1] || "")
    end
    if plen == 0
      result << self[offset, 1]
      offset += 1
    end
  end
  result << self[offset..-1] if offset < length
  result.join
end

gsub!(*args, &block) click to toggle source

Replace all matches of pattern with replacement. Call block (if given) for each match and replace pattern with the value of the block. Modify self with the final value.

ISO 15.2.10.5.19

 
               # File mrblib/string.rb, line 125
def gsub!(*args, &block)
  raise FrozenError, "can't modify frozen String" if frozen?
  return to_enum(:gsub!, *args) if args.length == 1 && !block
  str = self.gsub(*args, &block)
  return nil unless self.index(args[0])
  self.replace(str)
end

insert(index, other_str) → str click to toggle source

Inserts other_str before the character at the given index, modifying str. Negative indices count from the end of the string, and insert after the given character. The intent is insert aString so that it starts at the given index.

"abcd".insert(0, 'X')    #=> "Xabcd"
"abcd".insert(3, 'X')    #=> "abcXd"
"abcd".insert(4, 'X')    #=> "abcdX"
"abcd".insert(-3, 'X')   #=> "abXcd"
"abcd".insert(-1, 'X')   #=> "abcdX"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 254
def insert(idx, str)
  if idx == -1
    return self << str
  elsif idx < 0
    idx += 1
  end
  self[idx, 0] = str
  self
end

lines → array of string click to toggle source

lines {|s| block} → array of string

Returns strings per line;

a = "abc\ndef"
a.lines    #=> ["abc\n", "def"]

If a block is given, it works the same as each_line.

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 365
def lines(&blk)
  lines = self.__lines
  if blk
    lines.each do |line|
      blk.call(line)
    end
  end
  lines
end

ljust(integer, padstr=' ') → new_str click to toggle source

If integer is greater than the length of str, returns a new String of length integer with str left justified and padded with padstr; otherwise, returns str.

"hello".ljust(4)            #=> "hello"
"hello".ljust(20)           #=> "hello               "
"hello".ljust(20, '1234')   #=> "hello123412341234123"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 275
def ljust(idx, padstr = ' ')
  raise ArgumentError, 'zero width padding' if padstr == ''
  return self if idx <= self.size
  pad_repetitions = (idx / padstr.length).ceil
  padding = (padstr * pad_repetitions)[0...(idx - self.length)]
  self + padding
end

lstrip → new_str click to toggle source

Returns a copy of str with leading whitespace removed. See also String#rstrip and String#strip.

"  hello  ".lstrip   #=> "hello  "
"hello".lstrip       #=> "hello"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 26
def lstrip
  a = 0
  z = self.size - 1
  a += 1 while a <= z and " \f\n\r\t\v".include?(self[a])
  (z >= 0) ? self[a..z] : ""
end

lstrip! → self or nil click to toggle source

Removes leading whitespace from str, returning nil if no change was made. See also String#rstrip! and String#strip!.

"  hello  ".lstrip   #=> "hello  "
"hello".lstrip!      #=> nil

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 78
def lstrip!
  raise FrozenError, "can't modify frozen String" if frozen?
  s = self.lstrip
  (s == self) ? nil : self.replace(s)
end

partition(sep) click to toggle source

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 144
def partition(sep)
  raise TypeError, "type mismatch: #{sep.class} given" unless sep.is_a? String
  n = index(sep)
  unless n.nil?
    m = n + sep.size
    [ slice(0, n), sep, slice(m, size - m) ]
  else
    [ self, "", "" ]
  end
end

pathmap(spec=nil, &block) click to toggle source

 
               # File minirake, line 23
def pathmap(spec=nil, &block)
  return self if spec.nil?
  result = ''
  spec.scan(/%\{[^}]*\}-?\d*[sdpfnxX%]|%-?\d+d|%.|[^%]+/) do |frag|
    case frag
    when '%f'
      result << File.basename(self)
    when '%n'
      result << File.basename(self).ext
    when '%d'
      result << File.dirname(self)
    when '%x'
      result << File.extname(self)
    when '%X'
      result << self.ext
    when '%p'
      result << self
    when '%s'
      result << (File::ALT_SEPARATOR || File::SEPARATOR)
    when '%-'
      # do nothing
    when '%%'
      result << "%"
    when /%(-?\d+)d/
      result << pathmap_partial($1.to_i)
    when /^%\{([^}]*)\}(\d*[dpfnxX])/
      patterns, operator = $1, $2
      result << pathmap('%' + operator).pathmap_replace(patterns, &block)
    when /^%/
      fail ArgumentError, "Unknown pathmap specifier #{frag} in '#{spec}'"
    else
      result << frag
    end
  end
  result
end

prepend(other_str) → str click to toggle source

Prepend—Prepend the given string to str.

a = "world"
a.prepend("hello ") #=> "hello world"
a                   #=> "hello world"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 349
def prepend(arg)
  self[0, 0] = arg
  self
end

rjust(integer, padstr=' ') → new_str click to toggle source

If integer is greater than the length of str, returns a new String of length integer with str right justified and padded with padstr; otherwise, returns str.

"hello".rjust(4)            #=> "hello"
"hello".rjust(20)           #=> "               hello"
"hello".rjust(20, '1234')   #=> "123412341234123hello"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 294
def rjust(idx, padstr = ' ')
  raise ArgumentError, 'zero width padding' if padstr == ''
  return self if idx <= self.size
  pad_repetitions = (idx / padstr.length).ceil
  padding = (padstr * pad_repetitions)[0...(idx - self.length)]
  padding + self
end

rpartition(sep) click to toggle source

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 155
def rpartition(sep)
  raise TypeError, "type mismatch: #{sep.class} given" unless sep.is_a? String
  n = rindex(sep)
  unless n.nil?
    m = n + sep.size
    [ slice(0, n), sep, slice(m, size - m) ]
  else
    [ "", "", self ]
  end
end

rstrip → new_str click to toggle source

Returns a copy of str with trailing whitespace removed. See also String#lstrip and String#strip.

"  hello  ".rstrip   #=> "  hello"
"hello".rstrip       #=> "hello"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 43
def rstrip
  a = 0
  z = self.size - 1
  z -= 1 while a <= z and " \f\n\r\t\v\0".include?(self[z])
  (z >= 0) ? self[a..z] : ""
end

rstrip! → self or nil click to toggle source

Removes trailing whitespace from str, returning nil if no change was made. See also String#lstrip! and String#strip!.

"  hello  ".rstrip   #=> "  hello"
"hello".rstrip!      #=> nil

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 95
def rstrip!
  raise FrozenError, "can't modify frozen String" if frozen?
  s = self.rstrip
  (s == self) ? nil : self.replace(s)
end

slice!(fixnum) → new_str or nil click to toggle source

slice!(fixnum, fixnum) → new_str or nil

slice!(range) → new_str or nil

slice!(other_str) → new_str or nil

Deletes the specified portion from str, and returns the portion deleted.

string = "this is a string"
string.slice!(2)        #=> "i"
string.slice!(3..6)     #=> " is "
string.slice!("r")      #=> "r"
string                  #=> "thsa sting"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 182
def slice!(arg1, arg2=nil)
  raise FrozenError, "can't modify frozen String" if frozen?
  raise "wrong number of arguments (for 1..2)" if arg1.nil? && arg2.nil?

  if !arg1.nil? && !arg2.nil?
    idx = arg1
    idx += self.size if arg1 < 0
    if idx >= 0 && idx <= self.size && arg2 > 0
      str = self[idx, arg2]
    else
      return nil
    end
  else
    validated = false
    if arg1.kind_of?(Range)
      beg = arg1.begin
      ed = arg1.end
      beg += self.size if beg < 0
      ed += self.size if ed < 0
      ed -= 1 if arg1.exclude_end?
      validated = true
    elsif arg1.kind_of?(String)
      validated = true
    else
      idx = arg1
      idx += self.size if arg1 < 0
      validated = true if idx >=0 && arg1 < self.size
    end
    if validated
      str = self[arg1]
    else
      return nil
    end
  end
  unless str.nil? || str == ""
    if !arg1.nil? && !arg2.nil?
      idx = arg1 >= 0 ? arg1 : self.size+arg1
      str2 = self[0...idx] + self[idx+arg2..-1].to_s
    else
      if arg1.kind_of?(Range)
        idx = beg >= 0 ? beg : self.size+beg
        idx2 = ed>= 0 ? ed : self.size+ed
        str2 = self[0...idx] + self[idx2+1..-1].to_s
      elsif arg1.kind_of?(String)
        idx = self.index(arg1)
        str2 = self[0...idx] + self[idx+arg1.size..-1] unless idx.nil?
      else
        idx = arg1 >= 0 ? arg1 : self.size+arg1
        str2 = self[0...idx] + self[idx+1..-1].to_s
      end
    end
    self.replace(str2) unless str2.nil?
  end
  str
end

strip → new_str click to toggle source

Returns a copy of str with leading and trailing whitespace removed.

"    hello    ".strip   #=> "hello"
"\tgoodbye\r\n".strip   #=> "goodbye"

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 59
def strip
  a = 0
  z = self.size - 1
  a += 1 while a <= z and " \f\n\r\t\v".include?(self[a])
  z -= 1 while a <= z and " \f\n\r\t\v\0".include?(self[z])
  (z >= 0) ? self[a..z] : ""
end

strip! → str or nil click to toggle source

Removes leading and trailing whitespace from str. Returns nil if str was not altered.

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 108
def strip!
  raise FrozenError, "can't modify frozen String" if frozen?
  s = self.strip
  (s == self) ? nil : self.replace(s)
end

sub(*args, &block) click to toggle source

Replace only the first match of pattern with replacement. Call block (if given) for each match and replace pattern with the value of the block. Return the final value.

ISO 15.2.10.5.36

 
               # File mrblib/string.rb, line 150
def sub(*args, &block)
  unless (1..2).include?(args.length)
    raise ArgumentError, "wrong number of arguments (given #{args.length}, expected 2)"
  end

  pattern, replace = *args
  pattern.__to_str
  if args.length == 2 && block
    block = nil
  end
  unless block
    replace.__to_str
  end
  result = []
  this = dup
  found = index(pattern)
  return this unless found
  result << this[0, found]
  offset = found + pattern.length
  result << if block
    block.call(pattern).to_s
  else
    replace.__sub_replace(this[0, found], pattern, this[offset..-1] || "")
  end
  result << this[offset..-1] if offset < length
  result.join
end

sub!(*args, &block) click to toggle source

Replace only the first match of pattern with replacement. Call block (if given) for each match and replace pattern with the value of the block. Modify self with the final value.

ISO 15.2.10.5.37

 
               # File mrblib/string.rb, line 185
def sub!(*args, &block)
  raise FrozenError, "can't modify frozen String" if frozen?
  str = self.sub(*args, &block)
  return nil unless self.index(args[0])
  self.replace(str)
end

upto(other_str, exclusive=false) {|s| block } → str click to toggle source

upto(other_str, exclusive=false) → an_enumerator

Iterates through successive values, starting at str and ending at other_str inclusive, passing each value in turn to the block. The String#succ method is used to generate each value. If optional second argument exclusive is omitted or is false, the last value will be included; otherwise it will be excluded.

If no block is given, an enumerator is returned instead.

"a8".upto("b6") {|s| print s, ' ' }
for s in "a8".."b6"
  print s, ' '
end

produces:

a8 a9 b0 b1 b2 b3 b4 b5 b6
a8 a9 b0 b1 b2 b3 b4 b5 b6

If str and other_str contains only ascii numeric characters, both are recognized as decimal numbers. In addition, the width of string (e.g. leading zeros) is handled appropriately.

"9".upto("11").to_a   #=> ["9", "10", "11"]
"25".upto("5").to_a   #=> []
"07".upto("11").to_a  #=> ["07", "08", "09", "10", "11"]

 
               # File mrbgems/mruby-string-ext/mrblib/string.rb, line 405
def upto(max, exclusive=false, &block)
  return to_enum(:upto, max, exclusive) unless block
  raise TypeError, "no implicit conversion of #{max.class} into String" unless max.kind_of? String

  len = self.length
  maxlen = max.length
  # single character
  if len == 1 and maxlen == 1
    c = self.ord
    e = max.ord
    while c <= e
      break if exclusive and c == e
      yield c.chr(__ENCODING__)
      c += 1
    end
    return self
  end
  # both edges are all digits
  bi = self.to_i(10)
  ei = max.to_i(10)
  len = self.length
  if (bi > 0 or bi == "0"*len) and (ei > 0 or ei == "0"*maxlen)
    while bi <= ei
      break if exclusive and bi == ei
      s = bi.to_s
      s = s.rjust(len, "0") if s.length < len
      yield s
      bi += 1
    end
    return self
  end
  bs = self
  while true
    n = (bs <=> max)
    break if n > 0
    break if exclusive and n == 0
    yield bs
    break if n == 0
    bs = bs.succ
  end
  self
end

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