Class: String

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
opal/opal/corelib/string.rb,
opal/opal/corelib/encoding.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Comparable

#<, #<=, #>, #>=, #between?, normalize

Class Method Details

.new(str = '') ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 12

def self.new(str = '')
  `new String(str)`
end

.try_convert(what) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 6

def self.try_convert(what)
  what.to_str
rescue
  nil
end

Instance Method Details

#%(data) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 16

def %(data)
  if Array === data
    format(self, *data)
  else
    format(self, data)
  end
end

#*(count) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 24

def *(count)
  %x{
    if (count < 1) {
      return '';
    }

    var result  = '',
        pattern = self;

    while (count > 0) {
      if (count & 1) {
        result += pattern;
      }

      count >>= 1;
      pattern += pattern;
    }

    return result;
  }
end

#+(other) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 46

def +(other)
  other = Opal.coerce_to other, String, :to_str

  `self + #{other.to_s}`
end

#<=>(other) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 52

def <=>(other)
  if other.respond_to? :to_str
    other = other.to_str.to_s

    `self > other ? 1 : (self < other ? -1 : 0)`
  else
    %x{
      var cmp = #{other <=> self};

      if (cmp === nil) {
        return nil;
      }
      else {
        return cmp > 0 ? -1 : (cmp < 0 ? 1 : 0);
      }
    }
  end
end

#==(other) ⇒ Object Also known as: ===, eql? 



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# File 'opal/opal/corelib/string.rb', line 71

def ==(other)
  `!!(other._isString && self.valueOf() === other.valueOf())`
end

#=~(other) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 77

def =~(other)
  %x{
    if (other._isString) {
      #{raise TypeError, 'type mismatch: String given'};
    }

    return #{other =~ self};
  }
end

#[](index, length = undefined) ⇒ Object Also known as: slice 



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# File 'opal/opal/corelib/string.rb', line 87

def [](index, length = undefined)
  %x{
    var size = self.length;

    if (index._isRange) {
      var exclude = index.exclude,
          length  = index.end,
          index   = index.begin;

      if (index < 0) {
        index += size;
      }

      if (length < 0) {
        length += size;
      }

      if (!exclude) {
        length += 1;
      }

      if (index > size) {
        return nil;
      }

      length = length - index;

      if (length < 0) {
        length = 0;
      }

      return self.substr(index, length);
    }

    if (index < 0) {
      index += self.length;
    }

    if (length == null) {
      if (index >= self.length || index < 0) {
        return nil;
      }

      return self.substr(index, 1);
    }

    if (index > self.length || index < 0) {
      return nil;
    }

    return self.substr(index, length);
  }
end

#bytes ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 128

def bytes
  each_byte.to_a
end

#bytesize ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 132

def bytesize
  @encoding.bytesize(self)
end

#capitalize ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 141

def capitalize
  `self.charAt(0).toUpperCase() + self.substr(1).toLowerCase()`
end

#casecmp(other) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 145

def casecmp(other)
  other = Opal.coerce_to(other, String, :to_str).to_s

  `self.toLowerCase()` <=> `other.toLowerCase()`
end

#center(width, padstr = ' ') ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 151

def center(width, padstr = ' ')
  width  = Opal.coerce_to(width, Integer, :to_int)
  padstr = Opal.coerce_to(padstr, String, :to_str).to_s

  if padstr.empty?
    raise ArgumentError, 'zero width padding'
  end

  return self if `width <= self.length`

  %x{
    var ljustified = #{ljust ((width + @length) / 2).ceil, padstr},
        rjustified = #{rjust ((width + @length) / 2).floor, padstr};

    return rjustified + ljustified.slice(self.length);
  }
end

#chars ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 169

def chars
  each_char.to_a
end

#chomp(separator = $/) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 173

def chomp(separator = $/)
  return self if `separator === nil || self.length === 0`

  separator = Opal.coerce_to!(separator, String, :to_str).to_s

  %x{
    if (separator === "\\n") {
      return self.replace(/\\r?\\n?$/, '');
    }
    else if (separator === "") {
      return self.replace(/(\\r?\\n)+$/, '');
    }
    else if (self.length > separator.length) {
      var tail = self.substr(-1 * separator.length);

      if (tail === separator) {
        return self.substr(0, self.length - separator.length);
      }
    }
  }

  self
end

#chop ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 197

def chop
  %x{
    var length = self.length;

    if (length <= 1) {
      return "";
    }

    if (self.charAt(length - 1) === "\\n" && self.charAt(length - 2) === "\\r") {
      return self.substr(0, length - 2);
    }
    else {
      return self.substr(0, length - 1);
    }
  }
end

#chr ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 214

def chr
  `self.charAt(0)`
end

#clone ⇒ Object Also known as: dup 



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# File 'opal/opal/corelib/string.rb', line 218

def clone
  `self.slice()`
end

#count(str) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 222

def count(str)
  `(self.length - self.replace(new RegExp(str, 'g'), '').length) / str.length`
end

#downcase ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 228

def downcase
  `self.toLowerCase()`
end

#each_byte(&block) ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 136

def each_byte(&block)
  return enum_for :each_byte unless block_given?

  @encoding.each_byte(self, &block)

  self
end

#each_char(&block) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 232

def each_char(&block)
  return enum_for :each_char unless block_given?

  %x{
    for (var i = 0, length = self.length; i < length; i++) {
      #{yield `self.charAt(i)`};
    }
  }

  self
end

#each_line(separator = $/) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 244

def each_line(separator = $/)
  return split(separator) unless block_given?

  %x{
    var chomped  = #{chomp},
        trailing = self.length != chomped.length,
        splitted = chomped.split(separator);

    for (var i = 0, length = splitted.length; i < length; i++) {
      if (i < length - 1 || trailing) {
        #{yield `splitted[i] + separator`};
      }
      else {
        #{yield `splitted[i]`};
      }
    }
  }

  self
end

#empty? ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/string.rb', line 265

def empty?
  `self.length === 0`
end

#encoding ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 144

def encoding
  @encoding
end

#end_with?(*suffixes) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/string.rb', line 269

def end_with?(*suffixes)
  %x{
    for (var i = 0, length = suffixes.length; i < length; i++) {
      var suffix = #{Opal.coerce_to `suffixes[i]`, String, :to_str};

      if (self.length >= suffix.length && self.substr(0 - suffix.length) === suffix) {
        return true;
      }
    }
  }

  false
end

#force_encoding(encoding) ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 148

def force_encoding(encoding)
  encoding = Encoding.find(encoding)

  return self if encoding == @encoding

  %x{
    var result = new native_string(self);
    result.encoding = encoding;

    return result;
  }
end

#freeze ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 1035

def freeze
  self
end

#frozen? ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/string.rb', line 1039

def frozen?
  true
end

#getbyte(idx) ⇒ Object 



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# File 'opal/opal/corelib/encoding.rb', line 161

def getbyte(idx)
  @encoding.getbyte(self, idx)
end

#gsub(pattern, replace = undefined, &block) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 286

def gsub(pattern, replace = undefined, &block)
  if String === pattern || pattern.respond_to?(:to_str)
    pattern = /#{Regexp.escape(pattern.to_str)}/
  end

  unless Regexp === pattern
    raise TypeError, "wrong argument type #{pattern.class} (expected Regexp)"
  end

  %x{
    var pattern = pattern.toString(),
        options = pattern.substr(pattern.lastIndexOf('/') + 1) + 'g',
        regexp  = pattern.substr(1, pattern.lastIndexOf('/') - 1);

    #{self}.$sub._p = block;
    return #{self}.$sub(new RegExp(regexp, options), replace);
  }
end

#hash ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 305

def hash
  `#{self}.toString()`
end

#hex ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 309

def hex
  to_i 16
end

#include?(other) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/string.rb', line 313

def include?(other)
  %x{
    if (other._isString) {
      return self.indexOf(other) !== -1;
    }
  }

  unless other.respond_to? :to_str
    raise TypeError, "no implicit conversion of #{other.class.name} into String"
  end

  `self.indexOf(#{other.to_str}) !== -1`
end

#index(what, offset = nil) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 327

def index(what, offset = nil)
  if String === what
    what = what.to_s
  elsif what.respond_to? :to_str
    what = what.to_str.to_s
  elsif not Regexp === what
    raise TypeError, "type mismatch: #{what.class} given"
  end

  result = -1

  if offset
    offset = Opal.coerce_to offset, Integer, :to_int

    %x{
      var size = self.length;

      if (offset < 0) {
        offset = offset + size;
      }

      if (offset > size) {
        return nil;
      }
    }

    if Regexp === what
      result = (what =~ `self.substr(offset)`) || -1
    else
      result = `self.substr(offset).indexOf(what)`
    end

    %x{
      if (result !== -1) {
        result += offset;
      }
    }
  else
    if Regexp === what
      result = (what =~ self) || -1
    else
      result = `self.indexOf(what)`
    end
  end

  unless `result === -1`
    result
  end
end

#inspect ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 377

def inspect
  %x{
    var escapable = /[\\\\\\"\\x00-\\x1f\\x7f-\\x9f\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g,
        meta      = {
          '\\b': '\\\\b',
          '\\t': '\\\\t',
          '\\n': '\\\\n',
          '\\f': '\\\\f',
          '\\r': '\\\\r',
          '"' : '\\\\"',
          '\\\\': '\\\\\\\\'
        };

    escapable.lastIndex = 0;

    return escapable.test(self) ? '"' + self.replace(escapable, function(a) {
      var c = meta[a];

      return typeof c === 'string' ? c :
        '\\\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
    }) + '"' : '"' + self + '"';
  }
end

#intern ⇒ Object Also known as: to_sym 



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# File 'opal/opal/corelib/string.rb', line 401

def intern
  self
end

#length ⇒ Object Also known as: size 



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# File 'opal/opal/corelib/string.rb', line 409

def length
  `self.length`
end

#lines(separator = $/) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 405

def lines(separator = $/)
  each_line(separator).to_a
end

#ljust(width, padstr = ' ') ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 413

def ljust(width, padstr = ' ')
  width  = Opal.coerce_to(width, Integer, :to_int)
  padstr = Opal.coerce_to(padstr, String, :to_str).to_s

  if padstr.empty?
    raise ArgumentError, 'zero width padding'
  end

  return self if `width <= self.length`

  %x{
    var index  = -1,
        result = "";

    width -= self.length;

    while (++index < width) {
      result += padstr;
    }

    return self + result.slice(0, width);
  }
end

#lstrip ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 437

def lstrip
  `self.replace(/^\\s*/, '')`
end

#match(pattern, pos = undefined, &block) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 441

def match(pattern, pos = undefined, &block)
  if String === pattern || pattern.respond_to?(:to_str)
    pattern = /#{Regexp.escape(pattern.to_str)}/
  end

  unless Regexp === pattern
    raise TypeError, "wrong argument type #{pattern.class} (expected Regexp)"
  end

  pattern.match(self, pos, &block)
end

#next ⇒ Object Also known as: succ 



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# File 'opal/opal/corelib/string.rb', line 453

def next
  %x{
    if (#{self}.length === 0) {
      return "";
    }

    var initial = #{self}.substr(0, #{self}.length - 1);
    var last    = String.fromCharCode(#{self}.charCodeAt(#{self}.length - 1) + 1);

    return initial + last;
  }
end

#ord ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 466

def ord
  `#{self}.charCodeAt(0)`
end

#partition(str) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 470

def partition(str)
  %x{
    var result = #{self}.split(str);
    var splitter = (result[0].length === #{self}.length ? "" : str);

    return [result[0], splitter, result.slice(1).join(str.toString())];
  }
end

#reverse ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 479

def reverse
  `#{self}.split('').reverse().join('')`
end

#rindex(search, offset = undefined) ⇒ Object

TODO handle case where search is regexp



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# File 'opal/opal/corelib/string.rb', line 484

def rindex(search, offset = undefined)
  %x{
    var search_type = (search == null ? Opal.NilClass : search.constructor);
    if (search_type != String && search_type != RegExp) {
      var msg = "type mismatch: " + search_type + " given";
      #{raise TypeError.new(`msg`)};
    }

    if (#{self}.length == 0) {
      return search.length == 0 ? 0 : nil;
    }

    var result = -1;
    if (offset != null) {
      if (offset < 0) {
        offset = #{self}.length + offset;
      }

      if (search_type == String) {
        result = #{self}.lastIndexOf(search, offset);
      }
      else {
        result = #{self}.substr(0, offset + 1).$reverse().search(search);
        if (result !== -1) {
          result = offset - result;
        }
      }
    }
    else {
      if (search_type == String) {
        result = #{self}.lastIndexOf(search);
      }
      else {
        result = #{self}.$reverse().search(search);
        if (result !== -1) {
          result = #{self}.length - 1 - result;
        }
      }
    }

    return result === -1 ? nil : result;
  }
end

#rjust(width, padstr = ' ') ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 528

def rjust(width, padstr = ' ')
  width  = Opal.coerce_to(width, Integer, :to_int)
  padstr = Opal.coerce_to(padstr, String, :to_str).to_s

  if padstr.empty?
    raise ArgumentError, 'zero width padding'
  end

  return self if `width <= self.length`

  %x{
    var chars     = Math.floor(width - self.length),
        patterns  = Math.floor(chars / padstr.length),
        result    = Array(patterns + 1).join(padstr),
        remaining = chars - result.length;

    return result + padstr.slice(0, remaining) + self;
  }
end

#rstrip ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 548

def rstrip
  `self.replace(/\\s*$/, '')`
end

#scan(pattern, &block) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 552

def scan(pattern, &block)
  %x{
    if (pattern.global) {
      // should we clear it afterwards too?
      pattern.lastIndex = 0;
    }
    else {
      // rewrite regular expression to add the global flag to capture pre/post match
      pattern = new RegExp(pattern.source, 'g' + (pattern.multiline ? 'm' : '') + (pattern.ignoreCase ? 'i' : ''));
    }

    var result = [];
    var match;

    while ((match = pattern.exec(#{self})) != null) {
      var match_data = #{MatchData.new `pattern`, `match`};
      if (block === nil) {
        match.length == 1 ? result.push(match[0]) : result.push(match.slice(1));
      }
      else {
        match.length == 1 ? block(match[0]) : block.apply(#{self}, match.slice(1));
      }
    }

    return (block !== nil ? #{self} : result);
  }
end

#split(pattern = $; || ' ', limit = undefined) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 584

def split(pattern = $; || ' ', limit = undefined)
  `#{self}.split(pattern, limit)`
end

#start_with?(*prefixes) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/string.rb', line 588

def start_with?(*prefixes)
  %x{
    for (var i = 0, length = prefixes.length; i < length; i++) {
      var prefix = #{Opal.coerce_to `prefixes[i]`, String, :to_str};

      if (self.indexOf(prefix) === 0) {
        return true;
      }
    }

    return false;
  }
end

#strip ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 602

def strip
  `#{self}.replace(/^\\s*/, '').replace(/\\s*$/, '')`
end

#sub(pattern, replace = undefined, &block) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 606

def sub(pattern, replace = undefined, &block)
  %x{
    if (typeof(replace) === 'string') {
      // convert Ruby back reference to JavaScript back reference
      replace = replace.replace(/\\\\([1-9])/g, '$$$1')
      return #{self}.replace(pattern, replace);
    }
    if (block !== nil) {
      return #{self}.replace(pattern, function() {
        // FIXME: this should be a formal MatchData object with all the goodies
        var match_data = []
        for (var i = 0, len = arguments.length; i < len; i++) {
          var arg = arguments[i];
          if (arg == undefined) {
            match_data.push(nil);
          }
          else {
            match_data.push(arg);
          }
        }

        var str = match_data.pop();
        var offset = match_data.pop();
        var match_len = match_data.length;

        // $1, $2, $3 not being parsed correctly in Ruby code
        //for (var i = 1; i < match_len; i++) {
        //  __gvars[String(i)] = match_data[i];
        //}
        #{$& = `match_data[0]`};
        #{$~ = `match_data`};
        return block(match_data[0]);
      });
    }
    else if (replace !== undefined) {
      if (#{replace.is_a?(Hash)}) {
        return #{self}.replace(pattern, function(str) {
          var value = #{replace[str]};

          return (value == null) ? nil : #{value.to_s};
        });
      }
      else {
        replace = #{String.try_convert(replace)};

        if (replace == null) {
          #{raise TypeError, "can't convert #{replace.class} into String"};
        }

        return #{self}.replace(pattern, replace);
      }
    }
    else {
      // convert Ruby back reference to JavaScript back reference
      replace = replace.toString().replace(/\\\\([1-9])/g, '$$$1')
      return #{self}.replace(pattern, replace);
    }
  }
end

#sum(n = 16) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 668

def sum(n = 16)
  %x{
    var result = 0;

    for (var i = 0, length = #{self}.length; i < length; i++) {
      result += (#{self}.charCodeAt(i) % ((1 << n) - 1));
    }

    return result;
  }
end

#swapcase ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 680

def swapcase
  %x{
    var str = #{self}.replace(/([a-z]+)|([A-Z]+)/g, function($0,$1,$2) {
      return $1 ? $0.toUpperCase() : $0.toLowerCase();
    });

    if (#{self}.constructor === String) {
      return str;
    }

    return #{self.class.new `str`};
  }
end

#to_a ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 694

def to_a
  %x{
    if (#{self}.length === 0) {
      return [];
    }

    return [#{self}];
  }
end

#to_f ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 704

def to_f
  %x{
    var result = parseFloat(#{self});

    return isNaN(result) ? 0 : result;
  }
end

#to_i(base = 10) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 712

def to_i(base = 10)
  %x{
    var result = parseInt(#{self}, base);

    if (isNaN(result)) {
      return 0;
    }

    return result;
  }
end

#to_proc ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 724

def to_proc
  %x{
    var name = '$' + #{self};

    return function(arg) {
      var meth = arg[name];
      return meth ? meth.call(arg) : arg.$method_missing(name);
    };
  }
end

#to_s ⇒ Object Also known as: to_str 



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# File 'opal/opal/corelib/string.rb', line 735

def to_s
  `#{self}.toString()`
end

#tr(from, to) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 743

def tr(from, to)
  %x{
    if (from.length == 0 || from === to) {
      return #{self};
    }

    var subs = {};
    var from_chars = from.split('');
    var from_length = from_chars.length;
    var to_chars = to.split('');
    var to_length = to_chars.length;

    var inverse = false;
    var global_sub = null;
    if (from_chars[0] === '^') {
      inverse = true;
      from_chars.shift();
      global_sub = to_chars[to_length - 1]
      from_length -= 1;
    }

    var from_chars_expanded = [];
    var last_from = null;
    var in_range = false;
    for (var i = 0; i < from_length; i++) {
      var char = from_chars[i];
      if (last_from == null) {
        last_from = char;
        from_chars_expanded.push(char);
      }
      else if (char === '-') {
        if (last_from === '-') {
          from_chars_expanded.push('-');
          from_chars_expanded.push('-');
        }
        else if (i == from_length - 1) {
          from_chars_expanded.push('-');
        }
        else {
          in_range = true;
        }
      }
      else if (in_range) {
        var start = last_from.charCodeAt(0) + 1;
        var end = char.charCodeAt(0);
        for (var c = start; c < end; c++) {
          from_chars_expanded.push(String.fromCharCode(c));
        }
        from_chars_expanded.push(char);
        in_range = null;
        last_from = null;
      }
      else {
        from_chars_expanded.push(char);
      }
    }

    from_chars = from_chars_expanded;
    from_length = from_chars.length;

    if (inverse) {
      for (var i = 0; i < from_length; i++) {
        subs[from_chars[i]] = true;
      }
    }
    else {
      if (to_length > 0) {
        var to_chars_expanded = [];
        var last_to = null;
        var in_range = false;
        for (var i = 0; i < to_length; i++) {
          var char = to_chars[i];
          if (last_from == null) {
            last_from = char;
            to_chars_expanded.push(char);
          }
          else if (char === '-') {
            if (last_to === '-') {
              to_chars_expanded.push('-');
              to_chars_expanded.push('-');
            }
            else if (i == to_length - 1) {
              to_chars_expanded.push('-');
            }
            else {
              in_range = true;
            }
          }
          else if (in_range) {
            var start = last_from.charCodeAt(0) + 1;
            var end = char.charCodeAt(0);
            for (var c = start; c < end; c++) {
              to_chars_expanded.push(String.fromCharCode(c));
            }
            to_chars_expanded.push(char);
            in_range = null;
            last_from = null;
          }
          else {
            to_chars_expanded.push(char);
          }
        }

        to_chars = to_chars_expanded;
        to_length = to_chars.length;
      }

      var length_diff = from_length - to_length;
      if (length_diff > 0) {
        var pad_char = (to_length > 0 ? to_chars[to_length - 1] : '');
        for (var i = 0; i < length_diff; i++) {
          to_chars.push(pad_char);
        }
      }

      for (var i = 0; i < from_length; i++) {
        subs[from_chars[i]] = to_chars[i];
      }
    }

    var new_str = ''
    for (var i = 0, length = #{self}.length; i < length; i++) {
      var char = #{self}.charAt(i);
      var sub = subs[char];
      if (inverse) {
        new_str += (sub == null ? global_sub : char);
      }
      else {
        new_str += (sub != null ? sub : char);
      }
    }
    return new_str;
  }
end

#tr_s(from, to) ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 878

def tr_s(from, to)
  %x{
    if (from.length == 0) {
      return #{self};
    }

    var subs = {};
    var from_chars = from.split('');
    var from_length = from_chars.length;
    var to_chars = to.split('');
    var to_length = to_chars.length;

    var inverse = false;
    var global_sub = null;
    if (from_chars[0] === '^') {
      inverse = true;
      from_chars.shift();
      global_sub = to_chars[to_length - 1]
      from_length -= 1;
    }

    var from_chars_expanded = [];
    var last_from = null;
    var in_range = false;
    for (var i = 0; i < from_length; i++) {
      var char = from_chars[i];
      if (last_from == null) {
        last_from = char;
        from_chars_expanded.push(char);
      }
      else if (char === '-') {
        if (last_from === '-') {
          from_chars_expanded.push('-');
          from_chars_expanded.push('-');
        }
        else if (i == from_length - 1) {
          from_chars_expanded.push('-');
        }
        else {
          in_range = true;
        }
      }
      else if (in_range) {
        var start = last_from.charCodeAt(0) + 1;
        var end = char.charCodeAt(0);
        for (var c = start; c < end; c++) {
          from_chars_expanded.push(String.fromCharCode(c));
        }
        from_chars_expanded.push(char);
        in_range = null;
        last_from = null;
      }
      else {
        from_chars_expanded.push(char);
      }
    }

    from_chars = from_chars_expanded;
    from_length = from_chars.length;

    if (inverse) {
      for (var i = 0; i < from_length; i++) {
        subs[from_chars[i]] = true;
      }
    }
    else {
      if (to_length > 0) {
        var to_chars_expanded = [];
        var last_to = null;
        var in_range = false;
        for (var i = 0; i < to_length; i++) {
          var char = to_chars[i];
          if (last_from == null) {
            last_from = char;
            to_chars_expanded.push(char);
          }
          else if (char === '-') {
            if (last_to === '-') {
              to_chars_expanded.push('-');
              to_chars_expanded.push('-');
            }
            else if (i == to_length - 1) {
              to_chars_expanded.push('-');
            }
            else {
              in_range = true;
            }
          }
          else if (in_range) {
            var start = last_from.charCodeAt(0) + 1;
            var end = char.charCodeAt(0);
            for (var c = start; c < end; c++) {
              to_chars_expanded.push(String.fromCharCode(c));
            }
            to_chars_expanded.push(char);
            in_range = null;
            last_from = null;
          }
          else {
            to_chars_expanded.push(char);
          }
        }

        to_chars = to_chars_expanded;
        to_length = to_chars.length;
      }

      var length_diff = from_length - to_length;
      if (length_diff > 0) {
        var pad_char = (to_length > 0 ? to_chars[to_length - 1] : '');
        for (var i = 0; i < length_diff; i++) {
          to_chars.push(pad_char);
        }
      }

      for (var i = 0; i < from_length; i++) {
        subs[from_chars[i]] = to_chars[i];
      }
    }
    var new_str = ''
    var last_substitute = null
    for (var i = 0, length = #{self}.length; i < length; i++) {
      var char = #{self}.charAt(i);
      var sub = subs[char]
      if (inverse) {
        if (sub == null) {
          if (last_substitute == null) {
            new_str += global_sub;
            last_substitute = true;
          }
        }
        else {
          new_str += char;
          last_substitute = null;
        }
      }
      else {
        if (sub != null) {
          if (last_substitute == null || last_substitute !== sub) {
            new_str += sub;
            last_substitute = sub;
          }
        }
        else {
          new_str += char;
          last_substitute = null;
        }
      }
    }
    return new_str;
  }
end

#upcase ⇒ Object 



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# File 'opal/opal/corelib/string.rb', line 1031

def upcase
  `self.toUpperCase()`
end