Class: Hash

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
opal/opal/corelib/hash.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Enumerable

#all?, #any?, #chunk, #collect, #collect_concat, #count, #cycle, #detect, #drop, #drop_while, #each_cons, #each_entry, #each_slice, #each_with_index, #each_with_object, #entries, #find_all, #find_index, #first, #grep, #group_by, #inject, #lazy, #max, #max_by, #min, #min_by, #minmax, #minmax_by, #none?, #one?, #partition, #reverse_each, #slice_before, #sort, #sort_by, #take, #take_while, #zip

Constructor Details

#initialize(defaults = undefined, &block) ⇒ Hash

Returns a new instance of Hash



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# File 'opal/opal/corelib/hash.rb', line 72

def initialize(defaults = undefined, &block)
  %x{
    self.none = (defaults === undefined ? nil : defaults);
    self.proc = block;
  }
  self
end

Class Method Details

.[](*argv) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 9

def self.[](*argv)
  %x{
    var hash, i, argc = argv.length;

    if (argc === 1) {
      hash = #{Opal.coerce_to?(argv[0], Hash, :to_hash)};
      if (hash !== nil) {
        return #{allocate.merge!(`hash`)};
      }

      argv = #{Opal.coerce_to?(argv[0], Array, :to_ary)};
      if (argv === nil) {
        #{raise ArgumentError, 'odd number of arguments for Hash'}
      }

      argc = argv.length;
      hash = #{allocate};

      for (i = 0; i < argc; i++) {
        if (!argv[i].$$is_array) continue;
        switch(argv[i].length) {
        case 1:
          hash.$store(argv[i][0], nil);
          break;
        case 2:
          hash.$store(argv[i][0], argv[i][1]);
          break;
        default:
          #{raise ArgumentError, "invalid number of elements (#{`argv[i].length`} for 1..2)"}
        }
      }

      return hash;
    }

    if (argc % 2 !== 0) {
      #{raise ArgumentError, 'odd number of arguments for Hash'}
    }

    hash = #{allocate};

    for (i = 0; i < argc; i += 2) {
      hash.$store(argv[i], argv[i + 1]);
    }

    return hash;
  }
end

.allocate ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 58

def self.allocate
  %x{
    var hash = new self.$$alloc;

    hash.map  = {};
    hash.smap = {};
    hash.keys = [];
    hash.none = nil;
    hash.proc = nil;

    return hash;
  }
end

Instance Method Details

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



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# File 'opal/opal/corelib/hash.rb', line 80

def ==(other)
  %x{
    if (self === other) {
      return true;
    }

    if (!other.keys || !other.smap || !other.map) {
      return false;
    }

    if (self.keys.length !== other.keys.length) {
      return false;
    }

    var _map  = self.map,
        smap  = self.smap,
        _map2 = other.map,
        smap2 = other.smap,
        map, map2, key, khash, value, value2;

    for (var i = 0, length = self.keys.length; i < length; i++) {
      key = self.keys[i];

      if (key.$$is_string) {
        khash = key;
        map   = smap;
        map2  = smap2;
      } else {
        khash = key.$hash();
        map   = _map;
        map2  = _map2;
      }

      value  = map[khash];
      if (value === undefined) console.log('==', key, self);
      value2 = map2[khash];

      if (value2 === undefined || #{not(`value` == `value2`)}) {
        return false;
      }
    }

    return true;
  }
end

#[](key) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 126

def [](key)
  %x{
    var map, khash;

    if (key.$$is_string) {
      map = self.smap;
      khash = key;
    } else {
      map = self.map;
      khash = key.$hash();
    }

    if (map === undefined) { console.log(self, '[] --> key:', key, khash, map) }


    if (Opal.hasOwnProperty.call(map, khash)) {
      return map[khash];
    }

    var proc = #@proc;

    if (proc !== nil) {
      return #{ `proc`.call self, key };
    }

    return #@none;
  }
end

#[]=(key, value) ⇒ Object Also known as: store 



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# File 'opal/opal/corelib/hash.rb', line 155

def []=(key, value)
  %x{
    var map, khash, value;

    if (key.$$is_string) {
      map = self.smap;
      khash = key;
    } else {
      map = self.map;
      khash = key.$hash();
    }

    if (!Opal.hasOwnProperty.call(map, khash)) {
      self.keys.push(key);
    }

    map[khash] = value;

    return value;
  }
end

#assoc(object) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 177

def assoc(object)
  %x{
    var keys = self.keys,
        map, key, khash;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (#{`key` == object}) {
        if (key.$$is_string) {
          map = self.smap;
          khash = key;
        } else {
          map = self.map;
          khash = key.$hash();
        }

        return [key, map[khash]];
      }
    }

    return nil;
  }
end

#clear ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 202

def clear
  %x{
    self.map = {};
    self.smap = {};
    self.keys = [];
    return self;
  }
end

#clone ⇒ Object Also known as: dup 



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# File 'opal/opal/corelib/hash.rb', line 211

def clone
  %x{
    var _map  = {},
        smap  = {},
        _map2 = self.map,
        smap2 = self.smap,
        keys  = [],
        map, map2, key, khash, value;

    for (var i = 0, length = self.keys.length; i < length; i++) {
      key   = self.keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
        map2 = smap2;
      } else {
        khash = key.$hash();
        map = _map;
        map2 = _map2;
      }

      value = map2[khash];

      keys.push(key);
      map[khash] = value;
    }

    var clone = new self.$$class.$$alloc();

    clone.map  = _map;
    clone.smap = smap;
    clone.keys = keys;
    clone.none = self.none;
    clone.proc = self.proc;

    return clone;
  }
end

#default(val = undefined) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 251

def default(val = undefined)
  %x{
    if (val !== undefined && self.proc !== nil) {
      return #{@proc.call(self, val)};
    }
    return self.none;
  }
end

#default=(object) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 260

def default=(object)
  %x{
    self.proc = nil;
    return (self.none = object);
  }
end

#default_proc ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 267

def default_proc
  @proc
end

#default_proc=(proc) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 271

def default_proc=(proc)
  %x{
    if (proc !== nil) {
      proc = #{Opal.coerce_to!(proc, Proc, :to_proc)};

      if (#{proc.lambda?} && #{proc.arity.abs} != 2) {
        #{raise TypeError, "default_proc takes two arguments"};
      }
    }
    self.none = nil;
    return (self.proc = proc);
  }
end

#delete(key, &block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 285

def delete(key, &block)
  %x{
    var result, map, khash;

    if (key.$$is_string) {
      map = self.smap;
      khash = key;
    } else {
      map = self.map;
      khash = key.$hash();
    }

    result = map[khash];

    if (result != null) {
      delete map[khash];
      self.keys.$delete(key);

      return result;
    }

    if (block !== nil) {
      return #{block.call(key)};
    }
    return nil;
  }
end

#delete_if(&block) ⇒ Object 



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

def delete_if(&block)
  return enum_for :delete_if unless block

  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        map, key, value, obj, khash;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }
      obj = map[khash];
      value = block(key, obj);

      if (value === $breaker) {
        return $breaker.$v;
      }

      if (value !== false && value !== nil) {
        keys.splice(i, 1);
        delete map[khash];

        length--;
        i--;
      }
    }

    return self;
  }
end

#each(&block) ⇒ Object Also known as: each_pair 



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# File 'opal/opal/corelib/hash.rb', line 354

def each(&block)
  return enum_for :each unless block

  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        map, key, khash, value;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }

      value = Opal.yield1(block, [key, map[khash]]);

      if (value === $breaker) {
        return $breaker.$v;
      }
    }

    return self;
  }
end

#each_key(&block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 385

def each_key(&block)
  return enum_for :each_key unless block
  # @keys.each(&block)
  %x{
    var keys = self.keys, key;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (block(key) === $breaker) {
        return $breaker.$v;
      }
    }

    return self;
  }
end

#each_value(&block) ⇒ Object 



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

def each_value(&block)
  return enum_for :each_value unless block

  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys, key, map, khash;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }

      if (block(map[khash]) === $breaker) {
        return $breaker.$v;
      }
    }

    return self;
  }
end

#empty? ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/hash.rb', line 433

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

#fetch(key, defaults = undefined, &block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 439

def fetch(key, defaults = undefined, &block)
  %x{
    var map, khash, value;

    if (key.$$is_string) {
      khash = key;
      map = self.smap;
    } else {
      khash = key.$hash();
      map = self.map;
    }

    value = map[khash];

    if (value != null) {
      return value;
    }

    if (block !== nil) {
      var value;

      if ((value = block(key)) === $breaker) {
        return $breaker.$v;
      }

      return value;
    }

    if (defaults != null) {
      return defaults;
    }

    #{ raise KeyError, "key not found: #{key.inspect}" };
  }
end

#flatten(level = undefined) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 475

def flatten(level=undefined)
  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        result = [],
        map, key, khash, value;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      value = map[khash];

      result.push(key);

      if (value.$$is_array) {
        if (level == null || level === 1) {
          result.push(value);
        }
        else {
          result = result.concat(#{`value`.flatten(`level - 1`)});
        }
      }
      else {
        result.push(value);
      }
    }

    return result;
  }
end

#has_key?(key) ⇒ Boolean Also known as: include?, key?, member?

Returns:



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# File 'opal/opal/corelib/hash.rb', line 515

def has_key?(key)
  %x{
    var keys = self.keys,
        map, khash;

    if (key.$$is_string) {
      khash = key;
      map = self.smap;
    } else {
      khash = key.$hash();
      map = self.map;
    }

    if (Opal.hasOwnProperty.call(map, khash)) {
      for (var i = 0, length = keys.length; i < length; i++) {
        if (!#{not(key.eql?(`keys[i]`))}) {
          return true;
        }
      }
    }

    return false;
  }
end

#has_value?(value) ⇒ Boolean Also known as: value?

Returns:



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# File 'opal/opal/corelib/hash.rb', line 540

def has_value?(value)
  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys, key, map, khash;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }

      if (#{`map[khash]` == value}) {
        return true;
      }
    }

    return false;
  }
end

#hash ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 567

def hash
  %x{
    var top = (hash_ids === null);
    try {
      var key, value,
          hash = ['Hash'],
          keys = self.keys,
          id = self.$object_id(),
          counter = 0;

      if (top) {
        hash_ids = {}
      }

      if (hash_ids.hasOwnProperty(id)) {
        return 'self';
      }

      hash_ids[id] = true;

      for (var i = 0, length = keys.length; i < length; i++) {
        key   = keys[i];
        value = key.$$is_string ? self.smap[key] : self.map[key.$hash()];
        key   = key.$hash();
        value = (typeof(value) === 'undefined') ? '' : value.$hash();
        hash.push([key,value]);
      }

      return hash.sort().join();
    } finally {
      if (top) {
        hash_ids = null;
      }
    }
  }
end

#index(object) ⇒ Object Also known as: key 



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

def index(object)
  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        map, khash, key;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }

      if (#{`map[khash]` == object}) {
        return key;
      }
    }

    return nil;
  }
end

#indexes(*keys) ⇒ Object Also known as: indices, values_at 



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# File 'opal/opal/corelib/hash.rb', line 633

def indexes(*keys)
  %x{
    var result = [],
        _map = self.map,
        smap = self.smap,
        map, key, khash, value;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      value = map[khash];

      if (value != null) {
        result.push(value);
      }
      else {
        result.push(self.none);
      }
    }

    return result;
  }
end

#inspect ⇒ Object Also known as: to_s 



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

def inspect
  %x{
    var top = (inspect_ids === null);
    try {

      var key, value,
          inspect = [],
          keys = self.keys,
          id = self.$object_id(),
          counter = 0;

      if (top) {
        inspect_ids = {}
      }

      if (inspect_ids.hasOwnProperty(id)) {
        return '{...}';
      }

      inspect_ids[id] = true;

      for (var i = 0, length = keys.length; i < length; i++) {
        key   = keys[i];
        value = key.$$is_string ? self.smap[key] : self.map[key.$hash()];
        key   = key.$inspect();
        value = value.$inspect();
        inspect.push(key + '=>' + value);
      }

      return '{' + inspect.join(', ') + '}';
    } finally {

      if (top) {
        inspect_ids = null;
      }
    }
  }
end

#invert ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 707

def invert
  %x{
    var result = Opal.hash(),
        keys = self.keys,
        _map = self.map,
        smap = self.smap,
        keys2 = result.keys,
        _map2 = result.map,
        smap2 = result.smap,
        map, map2, key, khash, value;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        map = smap;
        khash = key;
      } else {
        map = _map;
        khash = key.$hash();
      }

      value = map[khash];
      keys2.push(value);

      if (value.$$is_string) {
        map2 = smap2;
        khash = value;
      } else {
        map2 = _map2;
        khash = value.$hash();
      }

      map2[khash] = key;
    }

    return result;
  }
end

#keep_if(&block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 747

def keep_if(&block)
  return enum_for :keep_if unless block

  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        map, key, khash, value, keep;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      value = map[khash];
      keep  = block(key, value);

      if (keep === $breaker) {
        return $breaker.$v;
      }

      if (keep === false || keep === nil) {
        keys.splice(i, 1);
        delete map[khash];

        length--;
        i--;
      }
    }

    return self;
  }
end

#keys ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 791

def keys
  `self.keys.slice(0)`
end

#length ⇒ Object Also known as: size 



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# File 'opal/opal/corelib/hash.rb', line 795

def length
  `self.keys.length`
end

#merge(other, &block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 801

def merge(other, &block)
  unless Hash === other
    other = Opal.coerce_to!(other, Hash, :to_hash)
  end

  cloned = clone
  cloned.merge!(other, &block)
  cloned
end

#merge!(other, &block) ⇒ Object Also known as: update 



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# File 'opal/opal/corelib/hash.rb', line 811

def merge!(other, &block)
  %x{
    if (! #{Hash === other}) {
      other = #{Opal.coerce_to!(other, Hash, :to_hash)};
    }

    var keys  = self.keys,
        _map  = self.map,
        smap  = self.smap,
        keys2 = other.keys,
        _map2 = other.map,
        smap2 = other.smap,
        map, map2, key, khash, value, value2;

    if (block === nil) {
      for (var i = 0, length = keys2.length; i < length; i++) {
        key = keys2[i];

        if (key.$$is_string) {
          khash = key;
          map = smap;
          map2 = smap2;
        } else {
          khash = key.$hash();
          map = _map;
          map2 = _map2;
        }

        if (map[khash] == null) {
          keys.push(key);
        }

        map[khash] = map2[khash];
      }
    }
    else {
      for (var i = 0, length = keys2.length; i < length; i++) {
        key    = keys2[i];

        if (key.$$is_string) {
          khash = key;
          map = smap;
          map2 = smap2;
        } else {
          khash = key.$hash();
          map = _map;
          map2 = _map2;
        }

        value  = map[khash];
        value2 = map2[khash];

        if (value == null) {
          keys.push(key);
          map[khash] = value2;
        }
        else {
          map[khash] = block(key, value, value2);
        }
      }
    }

    return self;
  }
end

#rassoc(object) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 877

def rassoc(object)
  %x{
    var keys = self.keys,
        _map = self.map,
        smap = self.smap,
        key, khash, value, map;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i]

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      value = map[khash];

      if (#{`value` == object}) {
        return [key, value];
      }
    }

    return nil;
  }
end

#reject(&block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 906

def reject(&block)
  return enum_for :reject unless block

  %x{
    var keys   = self.keys,
        _map    = self.map,
        smap    = self.smap,
        result = Opal.hash(),
        _map2   = result.map,
        smap2   = result.smap,
        keys2  = result.keys,
        map, map2, key, khash, object, value;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
        map2 = smap2;
      } else {
        khash = key.$hash();
        map = _map;
        map2 = _map2;
      }

      object = map[khash];

      if ((value = block(key, object)) === $breaker) {
        return $breaker.$v;
      }

      if (value === false || value === nil) {
        keys2.push(key);
        map2[khash] = object;
      }
    }

    return result;
  }
end

#replace(other) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 948

def replace(other)
  %x{
    var keys  = self.keys = [],
        _map  = self.map  = {},
        smap  = self.smap = {},
        _map2 = other.map,
        smap2 = other.smap,
        key, khash, map, map2;

    for (var i = 0, length = other.keys.length; i < length; i++) {
      key = other.keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
        map2 = smap2;
      } else {
        khash = key.$hash();
        map = _map;
        map2 = _map2;
      }

      keys.push(key);
      map[khash] = map2[khash];
    }

    return self;
  }
end

#select(&block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 978

def select(&block)
  return enum_for :select unless block

  %x{
    var keys   = self.keys,
        _map   = self.map,
        smap   = self.smap,
        result = Opal.hash(),
        _map2  = result.map,
        smap2  = result.smap,
        keys2  = result.keys,
        map, map2, key, khash, value, object;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
        map2 = smap2;
      } else {
        khash = key.$hash();
        map = _map;
        map2 = _map2;
      }

      value = map[khash];
      object = block(key, value);

      if (object === $breaker) {
        return $breaker.$v;
      }

      if (object !== false && object !== nil) {
        keys2.push(key);
        map2[khash] = value;
      }
    }

    return result;
  }
end

#select!(&block) ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1021

def select!(&block)
  return enum_for :select! unless block

  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        result = nil,
        key, khash, value, object, map;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      value = map[khash];
      object = block(key, value);

      if (object === $breaker) {
        return $breaker.$v;
      }

      if (object === false || object === nil) {
        keys.splice(i, 1);
        delete map[khash];

        length--;
        i--;
        result = self
      }
    }

    return result;
  }
end

#shift ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1063

def shift
  %x{
    var keys = self.keys,
        _map = self.map,
        smap = self.smap,
        map, key, khash, value;

    if (keys.length) {
      key = keys[0];
      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }
      value = map[khash];

      delete map[khash];
      keys.splice(0, 1);

      return [key, value];
    }

    return nil;
  }
end

#to_a ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1095

def to_a
  %x{
    var keys = self.keys,
        _map = self.map,
        smap = self.smap,
        result = [],
        map, key, khash;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      result.push([key, map[khash]]);
    }

    return result;
  }
end

#to_h ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1121

def to_h
  %x{
    if (self.$$class === Opal.Hash) {
      return self
    }

    var hash   = new Opal.Hash.$$alloc,
        cloned = #{clone};

    hash.map  = cloned.map;
    hash.smap = cloned.smap;
    hash.keys = cloned.keys;
    hash.none = cloned.none;
    hash.proc = cloned.proc;

    return hash;
  }
end

#to_hash ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1140

def to_hash
  self
end

#values ⇒ Object 



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# File 'opal/opal/corelib/hash.rb', line 1152

def values
  %x{
    var _map = self.map,
        smap = self.smap,
        keys = self.keys,
        result = [],
        map, khash, key;

    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];

      if (key.$$is_string) {
        khash = key;
        map = smap;
      } else {
        khash = key.$hash();
        map = _map;
      }

      result.push(map[khash]);
    }

    return result;
  }
end