Class: Array

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# File 'opal/opal/corelib/array.rb', line 77
def initialize(size = nil, obj = nil, &block)
 %x{
 if (obj !== nil && block !== nil) {
 #{warn('warning: block supersedes default value argument')}
 }
 if (size > #{Integer ::MAX }) {
 #{raise ArgumentError , 'array size too big'}
 }
 if (arguments.length > 2) {
 #{raise ArgumentError , "wrong number of arguments (#{`arguments.length`} for 0..2)"}
 }
 if (arguments.length === 0) {
 self.splice(0, self.length);
 return self;
 }
 if (arguments.length === 1) {
 if (size.$$is_array) {
 #{replace(size.to_a)}
 return self;
 } else if (#{size.respond_to? :to_ary}) {
 #{replace(size.to_ary)}
 return self;
 }
 }
 size = $coerce_to(size, #{Integer }, 'to_int');
 if (size < 0) {
 #{raise ArgumentError , 'negative array size'}
 }
 self.splice(0, self.length);
 var i, value;
 if (block === nil) {
 for (i = 0; i < size; i++) {
 self.push(obj);
 }
 }
 else {
 for (i = 0, value; i < size; i++) {
 value = block(i);
 self[i] = value;
 }
 }
 return self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 73
def self.[](*objects)
 `toArraySubclass(objects, self)`
end

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# File 'opal/opal/corelib/array.rb', line 2399
def self.inherited(klass)
 %x{
 klass.$$prototype.$to_a = function() {
 return this.slice(0, this.length);
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 131
def self.try_convert(obj)
 Opal .coerce_to?  obj, Array , :to_ary
end

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# File 'opal/opal/corelib/array.rb', line 135
def &(other)
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 %x{
 var result = [], hash = #{{}}, i, length, item;
 for (i = 0, length = other.length; i < length; i++) {
 $hash_put(hash, other[i], true);
 }
 for (i = 0, length = self.length; i < length; i++) {
 item = self[i];
 if ($hash_delete(hash, item) !== undefined) {
 result.push(item);
 }
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 182
def *(other)
 return join(other.to_str) if other.respond_to? :to_str
 other = `$coerce_to(other, #{Integer }, 'to_int')`
 if `other < 0`
 raise ArgumentError , 'negative argument'
 end
 %x{
 var result = [],
 converted = #{to_a};
 for (var i = 0; i < other; i++) {
 result = result.concat(converted);
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 203
def +(other)
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 `self.concat(other)`
end

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# File 'opal/opal/corelib/array.rb', line 213
def -(other)
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 return [] if `self.length === 0`
 return `self.slice()` if `other.length === 0`
 %x{
 var result = [], hash = #{{}}, i, length, item;
 for (i = 0, length = other.length; i < length; i++) {
 $hash_put(hash, other[i], true);
 }
 for (i = 0, length = self.length; i < length; i++) {
 item = self[i];
 if ($hash_get(hash, item) === undefined) {
 result.push(item);
 }
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 241
def <<(object)
 `self.push(object)`
 self
end

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# File 'opal/opal/corelib/array.rb', line 247
def <=>(other)
 if Array  === other
 other = other.to_a
 elsif other.respond_to? :to_ary
 other = other.to_ary.to_a
 else
 return
 end
 %x{
 if (#{hash} === #{other.hash}) {
 return 0;
 }
 var count = Math.min(self.length, other.length);
 for (var i = 0; i < count; i++) {
 var tmp = #{`self[i]` <=> `other[i]`};
 if (tmp !== 0) {
 return tmp;
 }
 }
 return #{`self.length` <=> `other.length`};
 }
end

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# File 'opal/opal/corelib/array.rb', line 275
def ==(other)
 %x{
 var recursed = {};
 function _eqeq(array, other) {
 var i, length, a, b;
 if (array === other)
 return true;
 if (!other.$$is_array) {
 if ($respond_to(other, '$to_ary')) {
 return #{`other` == `array`};
 } else {
 return false;
 }
 }
 if (array.$$constructor !== Array)
 array = #{`array`.to_a};
 if (other.$$constructor !== Array)
 other = #{`other`.to_a};
 if (array.length !== other.length) {
 return false;
 }
 recursed[#{`array`.object_id}] = true;
 for (i = 0, length = array.length; i < length; i++) {
 a = array[i];
 b = other[i];
 if (a.$$is_array) {
 if (b.$$is_array && b.length !== a.length) {
 return false;
 }
 if (!recursed.hasOwnProperty(#{`a`.object_id})) {
 if (!_eqeq(a, b)) {
 return false;
 }
 }
 } else {
 if (!#{`a` == `b`}) {
 return false;
 }
 }
 }
 return true;
 }
 return _eqeq(self, other);
 }
end

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# File 'opal/opal/corelib/array.rb', line 401
def [](index, length = undefined)
 %x{
 if (index.$$is_range) {
 return $array_slice_range(self, index);
 }
 else {
 return $array_slice_index_length(self, index, length);
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 412
def []=(index, value, extra = undefined)
 %x{
 var i, size = self.length;
 }
 if Range  === index
 data = if Array  === value
 value.to_a
 elsif value.respond_to? :to_ary
 value.to_ary.to_a
 else
 [value]
 end
 %x{
 var exclude = index.excl,
 from = $coerce_to(index.begin, #{Integer }, 'to_int'),
 to = $coerce_to(index.end, #{Integer }, 'to_int');
 if (from < 0) {
 from += size;
 if (from < 0) {
 #{raise RangeError , "#{index.inspect} out of range"};
 }
 }
 if (to < 0) {
 to += size;
 }
 if (!exclude) {
 to += 1;
 }
 if (from > size) {
 for (i = size; i < from; i++) {
 self[i] = nil;
 }
 }
 if (to < 0) {
 self.splice.apply(self, [from, 0].concat(data));
 }
 else {
 self.splice.apply(self, [from, to - from].concat(data));
 }
 return value;
 }
 else
 if `extra === undefined`
 length = 1
 else
 length = value
 value = extra
 data = if Array  === value
 value.to_a
 elsif value.respond_to? :to_ary
 value.to_ary.to_a
 else
 [value]
 end
 end
 %x{
 var old;
 index = $coerce_to(index, #{Integer }, 'to_int');
 length = $coerce_to(length, #{Integer }, 'to_int');
 if (index < 0) {
 old = index;
 index += size;
 if (index < 0) {
 #{raise IndexError , "index #{`old`} too small for array; minimum #{`-self.length`}"};
 }
 }
 if (length < 0) {
 #{raise IndexError , "negative length (#{length})"}
 }
 if (index > size) {
 for (i = size; i < index; i++) {
 self[i] = nil;
 }
 }
 if (extra === undefined) {
 self[index] = value;
 }
 else {
 self.splice.apply(self, [index, length].concat(data));
 }
 return value;
 }
 end
end

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# File 'opal/opal/corelib/marshal/write_buffer.rb', line 49
def __marshal__(buffer)
 buffer.save_link(self)
 buffer.write_ivars_prefix(self)
 buffer.write_extends(self)
 buffer.write_user_class(Array , self)
 buffer.append('[')
 buffer.write_array(self)
 buffer.write_ivars_suffix(self)
end

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# File 'opal/opal/corelib/array.rb', line 515
def any?(pattern = undefined, &block)
 `if (self.length === 0) return false`
 super
end

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# File 'opal/opal/corelib/array.rb', line 520
def assoc(object)
 %x{
 for (var i = 0, length = self.length, item; i < length; i++) {
 if (item = self[i], item.length && #{`item[0]` == object}) {
 return item;
 }
 }
 return nil;
 }
end

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# File 'opal/opal/corelib/array.rb', line 532
def at(index)
 %x{
 index = $coerce_to(index, #{Integer }, 'to_int')
 if (index < 0) {
 index += self.length;
 }
 if (index < 0 || index >= self.length) {
 return nil;
 }
 return self[index];
 }
end

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# File 'opal/opal/corelib/array.rb', line 587
def bsearch(&block)
 return enum_for :bsearch unless block_given?
 index = bsearch_index(&block)
 %x{
 if (index != null && index.$$is_number) {
 return self[index];
 } else {
 return index;
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 548
def bsearch_index(&block)
 return enum_for :bsearch_index unless block_given?
 %x{
 var min = 0,
 max = self.length,
 mid,
 val,
 ret,
 smaller = false,
 satisfied = nil;
 while (min < max) {
 mid = min + Math.floor((max - min) / 2);
 val = self[mid];
 ret = $yield1(block, val);
 if (ret === true) {
 satisfied = mid;
 smaller = true;
 }
 else if (ret === false || ret === nil) {
 smaller = false;
 }
 else if (ret.$$is_number) {
 if (ret === 0) { return mid; }
 smaller = (ret < 0);
 }
 else {
 #{raise TypeError , "wrong argument type #{`ret`.class} (must be numeric, true, false or nil)"}
 }
 if (smaller) { max = mid; } else { min = mid + 1; }
 }
 return satisfied;
 }
end

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# File 'opal/opal/corelib/array.rb', line 644
def clear
 `self.splice(0, self.length)`
 self
end

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# File 'opal/opal/corelib/array.rb', line 662
def collect(&block)
 return enum_for(:collect) { size } unless block_given?
 %x{
 var result = [];
 for (var i = 0, length = self.length; i < length; i++) {
 var value = $yield1(block, self[i]);
 result.push(value);
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 677
def collect!(&block)
 return enum_for(:collect!) { size } unless block_given?
 %x{
 for (var i = 0, length = self.length; i < length; i++) {
 var value = $yield1(block, self[i]);
 self[i] = value;
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 704
def combination(n)
 num = Opal .coerce_to!  n, Integer , :to_int
 return enum_for(:combination, num) { `binomial_coefficient(#{self}.length, num)` } unless block_given?
 %x{
 var i, length, stack, chosen, lev, done, next;
 if (num === 0) {
 #{yield []}
 } else if (num === 1) {
 for (i = 0, length = self.length; i < length; i++) {
 #{yield `[self[i]]`}
 }
 }
 else if (num === self.length) {
 #{yield `self.slice()`}
 }
 else if (num >= 0 && num < self.length) {
 stack = [];
 for (i = 0; i <= num + 1; i++) {
 stack.push(0);
 }
 chosen = [];
 lev = 0;
 done = false;
 stack[0] = -1;
 while (!done) {
 chosen[lev] = self[stack[lev+1]];
 while (lev < num - 1) {
 lev++;
 next = stack[lev+1] = stack[lev] + 1;
 chosen[lev] = self[next];
 }
 #{ yield `chosen.slice()` }
 lev++;
 do {
 done = (lev === 0);
 stack[lev]++;
 lev--;
 } while ( stack[lev+1] + num === self.length + lev + 1 );
 }
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 780
def compact
 %x{
 var result = [];
 for (var i = 0, length = self.length, item; i < length; i++) {
 if ((item = self[i]) !== nil) {
 result.push(item);
 }
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 794
def compact!
 %x{
 var original = self.length;
 for (var i = 0, length = self.length; i < length; i++) {
 if (self[i] === nil) {
 self.splice(i, 1);
 length--;
 i--;
 }
 }
 return self.length === original ? nil : self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 811
def concat(*others)
 others = others.map do |other|
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 if other.equal?(self)
 other = other.dup
 end
 other
 end
 others.each do |other|
 %x{
 for (var i = 0, length = other.length; i < length; i++) {
 self.push(other[i]);
 }
 }
 end
 self
end

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# File 'opal/opal/corelib/array.rb', line 650
def count(object = nil, &block)
 if object || block
 super
 else
 size
 end
end

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# File 'opal/opal/corelib/array.rb', line 601
def cycle(n = nil, &block)
 unless block_given?
 return enum_for(:cycle, n) do
 if n.nil?
 Float ::INFINITY 
 else
 n = Opal .coerce_to! (n, Integer , :to_int)
 n > 0 ? enumerator_size * n : 0
 end
 end
 end
 return if empty? || n == 0
 %x{
 var i, length, value;
 if (n === nil) {
 while (true) {
 for (i = 0, length = self.length; i < length; i++) {
 value = $yield1(block, self[i]);
 }
 }
 }
 else {
 n = #{Opal .coerce_to! (n, Integer , :to_int)};
 if (n <= 0) {
 return self;
 }
 while (n > 0) {
 for (i = 0, length = self.length; i < length; i++) {
 value = $yield1(block, self[i]);
 }
 n--;
 }
 }
 }
 self
end

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# File 'opal/opal/corelib/pattern_matching.rb', line 126
def deconstruct
 self
end

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# File 'opal/opal/corelib/array.rb', line 837
def delete(object)
 %x{
 var original = self.length;
 for (var i = 0, length = original; i < length; i++) {
 if (#{`self[i]` == object}) {
 self.splice(i, 1);
 length--;
 i--;
 }
 }
 if (self.length === original) {
 if (#{block_given?}) {
 return #{yield};
 }
 return nil;
 }
 return object;
 }
end

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# File 'opal/opal/corelib/array.rb', line 860
def delete_at(index)
 %x{
 index = $coerce_to(index, #{Integer }, 'to_int');
 if (index < 0) {
 index += self.length;
 }
 if (index < 0 || index >= self.length) {
 return nil;
 }
 var result = self[index];
 self.splice(index, 1);
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 880
def delete_if(&block)
 return enum_for(:delete_if) { size } unless block_given?
 %x{filterIf(self, $falsy, block)}
 self
end

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# File 'opal/opal/corelib/array.rb', line 886
def difference(*arrays)
 arrays.reduce(to_a.dup) { |a, b| a - b }
end

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# File 'opal/opal/corelib/array.rb', line 890
def dig(idx, *idxs)
 item = self[idx]
 %x{
 if (item === nil || idxs.length === 0) {
 return item;
 }
 }
 unless item.respond_to?(:dig)
 raise TypeError , "#{item.class} does not have #dig method"
 end
 item.dig(*idxs)
end

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# File 'opal/opal/corelib/array.rb', line 906
def drop(number)
 %x{
 if (number < 0) {
 #{raise ArgumentError }
 }
 return self.slice(number);
 }
end

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# File 'opal/opal/corelib/array.rb', line 916
def dup
 %x{
 if (self.$$class === Opal.Array &&
 self.$$class.$allocate.$$pristine &&
 self.$copy_instance_variables.$$pristine &&
 self.$initialize_dup.$$pristine) {
 return self.slice(0);
 }
 }
 super
end

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# File 'opal/opal/corelib/array.rb', line 929
def each(&block)
 return enum_for(:each) { size } unless block_given?
 %x{
 for (var i = 0, length = self.length; i < length; i++) {
 var value = $yield1(block, self[i]);
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 941
def each_index(&block)
 return enum_for(:each_index) { size } unless block_given?
 %x{
 for (var i = 0, length = self.length; i < length; i++) {
 var value = $yield1(block, i);
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 953
def empty?
 `self.length === 0`
end

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# File 'opal/opal/corelib/array.rb', line 957
def eql?(other)
 %x{
 var recursed = {};
 function _eql(array, other) {
 var i, length, a, b;
 if (!other.$$is_array) {
 return false;
 }
 other = #{other.to_a};
 if (array.length !== other.length) {
 return false;
 }
 recursed[#{`array`.object_id}] = true;
 for (i = 0, length = array.length; i < length; i++) {
 a = array[i];
 b = other[i];
 if (a.$$is_array) {
 if (b.$$is_array && b.length !== a.length) {
 return false;
 }
 if (!recursed.hasOwnProperty(#{`a`.object_id})) {
 if (!_eql(a, b)) {
 return false;
 }
 }
 } else {
 if (!#{`a`.eql?(`b`)}) {
 return false;
 }
 }
 }
 return true;
 }
 return _eql(self, other);
 }
end

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# File 'opal/opal/corelib/array.rb', line 1002
def fetch(index, defaults = undefined, &block)
 %x{
 var original = index;
 index = $coerce_to(index, #{Integer }, 'to_int');
 if (index < 0) {
 index += self.length;
 }
 if (index >= 0 && index < self.length) {
 return self[index];
 }
 if (block !== nil && defaults != null) {
 #{warn('warning: block supersedes default value argument')}
 }
 if (block !== nil) {
 return block(original);
 }
 if (defaults != null) {
 return defaults;
 }
 if (self.length === 0) {
 #{raise IndexError , "index #{`original`} outside of array bounds: 0...0"}
 }
 else {
 #{raise IndexError , "index #{`original`} outside of array bounds: -#{`self.length`}...#{`self.length`}"};
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 1037
def fill(*args, &block)
 %x{
 var i, length, value;
 }
 if block
 if `args.length > 2`
 raise ArgumentError , "wrong number of arguments (#{args.length} for 0..2)"
 end
 one, two = args
 else
 if `args.length == 0`
 raise ArgumentError , 'wrong number of arguments (0 for 1..3)'
 elsif `args.length > 3`
 raise ArgumentError , "wrong number of arguments (#{args.length} for 1..3)"
 end
 obj, one, two = args
 end
 if Range  === one
 raise TypeError , 'length invalid with range' if two
 left = `$coerce_to(one.begin, #{Integer }, 'to_int')`
 `left += this.length` if `left < 0`
 raise RangeError , "#{one.inspect} out of range" if `left < 0`
 right = `$coerce_to(one.end, #{Integer }, 'to_int')`
 `right += this.length` if `right < 0`
 `right += 1` unless one.exclude_end?
 return self if `right <= left`
 elsif one
 left = `$coerce_to(one, #{Integer }, 'to_int')`
 `left += this.length` if `left < 0`
 left = 0 if `left < 0`
 if two
 right = `$coerce_to(two, #{Integer }, 'to_int')`
 return self if `right == 0`
 `right += left`
 else
 right = `this.length`
 end
 else
 left = 0
 right = `this.length`
 end
 if `left > this.length`
 %x{
 for (i = this.length; i < right; i++) {
 self[i] = nil;
 }
 }
 end
 if `right > this.length`
 `this.length = right`
 end
 if block
 %x{
 for (length = this.length; left < right; left++) {
 value = block(left);
 self[left] = value;
 }
 }
 else
 %x{
 for (length = this.length; left < right; left++) {
 self[left] = #{obj};
 }
 }
 end
 self
end

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# File 'opal/opal/corelib/array.rb', line 1119
def first(count = undefined)
 %x{
 if (count == null) {
 return self.length === 0 ? nil : self[0];
 }
 count = $coerce_to(count, #{Integer }, 'to_int');
 if (count < 0) {
 #{raise ArgumentError , 'negative array size'};
 }
 return self.slice(0, count);
 }
end

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# File 'opal/opal/corelib/array.rb', line 1135
def flatten(level = undefined)
 %x{
 function _flatten(array, level) {
 var result = [],
 i, length,
 item, ary;
 array = #{`array`.to_a};
 for (i = 0, length = array.length; i < length; i++) {
 item = array[i];
 if (!$respond_to(item, '$to_ary', true)) {
 result.push(item);
 continue;
 }
 ary = #{`item`.to_ary};
 if (ary === nil) {
 result.push(item);
 continue;
 }
 if (!ary.$$is_array) {
 #{raise TypeError };
 }
 if (ary === self) {
 #{raise ArgumentError };
 }
 switch (level) {
 case undefined:
 result = result.concat(_flatten(ary));
 break;
 case 0:
 result.push(ary);
 break;
 default:
 result.push.apply(result, _flatten(ary, level - 1));
 }
 }
 return result;
 }
 if (level !== undefined) {
 level = $coerce_to(level, #{Integer }, 'to_int');
 }
 return _flatten(self, level);
 }
end

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# File 'opal/opal/corelib/array.rb', line 1189
def flatten!(level = undefined)
 %x{
 var flattened = #{flatten level};
 if (self.length == flattened.length) {
 for (var i = 0, length = self.length; i < length; i++) {
 if (self[i] !== flattened[i]) {
 break;
 }
 }
 if (i == length) {
 return nil;
 }
 }
 #{replace `flattened`};
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1211
def hash
 %x{
 var top = ($hash_ids === undefined),
 result = ['A'],
 hash_id = self.$object_id(),
 item, i, key;
 try {
 if (top) {
 $hash_ids = Object.create(null);
 }
 // return early for recursive structures
 if ($hash_ids[hash_id]) {
 return 'self';
 }
 for (key in $hash_ids) {
 item = $hash_ids[key];
 if (#{eql?(`item`)}) {
 return 'self';
 }
 }
 $hash_ids[hash_id] = self;
 for (i = 0; i < self.length; i++) {
 item = self[i];
 result.push(item.$hash());
 }
 return result.join(',');
 } finally {
 if (top) {
 $hash_ids = undefined;
 }
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 1251
def include?(member)
 %x{
 for (var i = 0, length = self.length; i < length; i++) {
 if (#{`self[i]` == member}) {
 return true;
 }
 }
 return false;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1263
def index(object = undefined, &block)
 %x{
 var i, length, value;
 if (object != null && block !== nil) {
 #{warn('warning: given block not used')}
 }
 if (object != null) {
 for (i = 0, length = self.length; i < length; i++) {
 if (#{`self[i]` == object}) {
 return i;
 }
 }
 }
 else if (block !== nil) {
 for (i = 0, length = self.length; i < length; i++) {
 value = block(self[i]);
 if (value !== false && value !== nil) {
 return i;
 }
 }
 }
 else {
 return #{enum_for :index};
 }
 return nil;
 }
end

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# File 'opal/opal/corelib/array.rb', line 658
def initialize_copy(other)
 replace other
end

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# File 'opal/opal/corelib/array.rb', line 1295
def insert(index, *objects)
 %x{
 index = $coerce_to(index, #{Integer }, 'to_int');
 if (objects.length > 0) {
 if (index < 0) {
 index += self.length + 1;
 if (index < 0) {
 #{ raise IndexError , "#{index} is out of bounds" };
 }
 }
 if (index > self.length) {
 for (var i = self.length; i < index; i++) {
 self.push(nil);
 }
 }
 self.splice.apply(self, [index, 0].concat(objects));
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1320
def inspect
 %x{
 var result = [],
 id = #{__id__};
 for (var i = 0, length = self.length; i < length; i++) {
 var item = #{self[`i`]};
 if (#{`item`.__id__} === id) {
 result.push('[...]');
 }
 else {
 result.push(#{`item`.inspect});
 }
 }
 return '[' + result.join(', ') + ']';
 }
end

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# File 'opal/opal/corelib/array.rb', line 2407
def instance_variables
 super.reject { |ivar| `/^@\d+$/.test(#{ivar})` || ivar == '@length' }
end

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# File 'opal/opal/corelib/array.rb', line 1340
def intersection(*arrays)
 arrays.reduce(to_a.dup) { |a, b| a & b }
end

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# File 'opal/opal/corelib/array.rb', line 1344
def join(sep = nil)
 return '' if `self.length === 0`
 if `sep === nil`
 sep = ,ドル
 end
 %x{
 var result = [];
 var i, length, item, tmp;
 for (i = 0, length = self.length; i < length; i++) {
 item = self[i];
 if ($respond_to(item, '$to_str')) {
 tmp = #{`item`.to_str};
 if (tmp !== nil) {
 result.push(#{`tmp`.to_s });
 continue;
 }
 }
 if ($respond_to(item, '$to_ary')) {
 tmp = #{`item`.to_ary};
 if (tmp === self) {
 #{raise ArgumentError };
 }
 if (tmp !== nil) {
 result.push(#{`tmp`.join(sep)});
 continue;
 }
 }
 if ($respond_to(item, '$to_s')) {
 tmp = #{`item`.to_s };
 if (tmp !== nil) {
 result.push(tmp);
 continue;
 }
 }
 #{raise NoMethodError .new ("#{`Opal.inspect(item)`} doesn't respond to #to_str, #to_ary or #to_s", 'to_str')};
 }
 if (sep === nil) {
 return result.join('');
 }
 else {
 return result.join(#{Opal .coerce_to! (sep, String , :to_str).to_s});
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 1404
def keep_if(&block)
 return enum_for(:keep_if) { size } unless block_given?
 %x{filterIf(self, $truthy, block)}
 self
end

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# File 'opal/opal/corelib/array.rb', line 1410
def last(count = undefined)
 %x{
 if (count == null) {
 return self.length === 0 ? nil : self[self.length - 1];
 }
 count = $coerce_to(count, #{Integer }, 'to_int');
 if (count < 0) {
 #{raise ArgumentError , 'negative array size'};
 }
 if (count > self.length) {
 count = self.length;
 }
 return self.slice(self.length - count, self.length);
 }
end

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# File 'opal/opal/corelib/array.rb', line 1430
def length
 `self.length`
end

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# File 'opal/opal/corelib/array.rb', line 1438
def max(n = undefined, &block)
 each.max(n, &block)
end

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# File 'opal/opal/corelib/array.rb', line 1442
def min(&block)
 each.min(&block)
end

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# File 'opal/opal/corelib/array.rb', line 2414
def pack(*args)
 raise "To use Array#pack, you must first require 'corelib/array/pack'."
end

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# File 'opal/opal/corelib/array.rb', line 1459
def permutation(num = undefined, &block)
 unless block_given?
 return enum_for(:permutation, num) do
 `descending_factorial(self.length, num === undefined ? self.length : num)`
 end
 end
 %x{
 var permute, offensive, output;
 if (num === undefined) {
 num = self.length;
 }
 else {
 num = $coerce_to(num, #{Integer }, 'to_int');
 }
 if (num < 0 || self.length < num) {
 // no permutations, yield nothing
 }
 else if (num === 0) {
 // exactly one permutation: the zero-length array
 #{ yield [] }
 }
 else if (num === 1) {
 // this is a special, easy case
 for (var i = 0; i < self.length; i++) {
 #{ yield `[self[i]]` }
 }
 }
 else {
 // this is the general case
 #{ perm = Array .new (num) };
 #{ used = Array .new (`self.length`, false) };
 permute = function(num, perm, index, used, blk) {
 self = this;
 for(var i = 0; i < self.length; i++){
 if(#{ !used[`i`] }) {
 perm[index] = i;
 if(index < num - 1) {
 used[i] = true;
 permute.call(self, num, perm, index + 1, used, blk);
 used[i] = false;
 }
 else {
 output = [];
 for (var j = 0; j < perm.length; j++) {
 output.push(self[perm[j]]);
 }
 $yield1(blk, output);
 }
 }
 }
 }
 if (#{block_given?}) {
 // offensive (both definitions) copy.
 offensive = self.slice();
 permute.call(offensive, num, perm, 0, used, block);
 }
 else {
 permute.call(self, num, perm, 0, used, block);
 }
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1553
def pop(count = undefined)
 if `count === undefined`
 return if `self.length === 0`
 return `self.pop()`
 end
 count = `$coerce_to(count, #{Integer }, 'to_int')`
 if `count < 0`
 raise ArgumentError , 'negative array size'
 end
 return [] if `self.length === 0`
 if `count === 1`
 `[self.pop()]`
 elsif `count > self.length`
 `self.splice(0, self.length)`
 else
 `self.splice(self.length - count, self.length)`
 end
end

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# File 'opal/opal/corelib/array.rb', line 1576
def product(*args, &block)
 %x{
 var result = #{block_given?} ? null : [],
 n = args.length + 1,
 counters = new Array(n),
 lengths = new Array(n),
 arrays = new Array(n),
 i, m, subarray, len, resultlen = 1;
 arrays[0] = self;
 for (i = 1; i < n; i++) {
 arrays[i] = $coerce_to(args[i - 1], #{Array }, 'to_ary');
 }
 for (i = 0; i < n; i++) {
 len = arrays[i].length;
 if (len === 0) {
 return result || self;
 }
 resultlen *= len;
 if (resultlen > 2147483647) {
 #{raise RangeError , 'too big to product'}
 }
 lengths[i] = len;
 counters[i] = 0;
 }
 outer_loop: for (;;) {
 subarray = [];
 for (i = 0; i < n; i++) {
 subarray.push(arrays[i][counters[i]]);
 }
 if (result) {
 result.push(subarray);
 } else {
 #{yield `subarray`}
 }
 m = n - 1;
 counters[m]++;
 while (counters[m] === lengths[m]) {
 counters[m] = 0;
 if (--m < 0) break outer_loop;
 counters[m]++;
 }
 }
 return result || self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1626
def push(*objects)
 %x{
 for (var i = 0, length = objects.length; i < length; i++) {
 self.push(objects[i]);
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1638
def rassoc(object)
 %x{
 for (var i = 0, length = self.length, item; i < length; i++) {
 item = self[i];
 if (item.length && item[1] !== undefined) {
 if (#{`item[1]` == object}) {
 return item;
 }
 }
 }
 return nil;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1654
def reject(&block)
 return enum_for(:reject) { size } unless block_given?
 %x{
 var result = [];
 for (var i = 0, length = self.length, value; i < length; i++) {
 value = block(self[i]);
 if (value === false || value === nil) {
 result.push(self[i]);
 }
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1671
def reject!(&block)
 return enum_for(:reject!) { size } unless block_given?
 original = length
 delete_if(&block)
 unless length == original
 self
 end
end

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# File 'opal/opal/corelib/array.rb', line 752
def repeated_combination(n)
 num = Opal .coerce_to!  n, Integer , :to_int
 unless block_given?
 return enum_for(:repeated_combination, num) { `binomial_coefficient(self.length + num - 1, num)` }
 end
 %x{
 function iterate(max, from, buffer, self) {
 if (buffer.length == max) {
 var copy = buffer.slice();
 #{yield `copy`}
 return;
 }
 for (var i = from; i < self.length; i++) {
 buffer.push(self[i]);
 iterate(max, i, buffer, self);
 buffer.pop();
 }
 }
 if (num >= 0) {
 iterate(num, 0, [], self);
 }
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1529
def repeated_permutation(n)
 num = Opal .coerce_to!  n, Integer , :to_int
 return enum_for(:repeated_permutation, num) { num >= 0 ? size**num : 0 } unless block_given?
 %x{
 function iterate(max, buffer, self) {
 if (buffer.length == max) {
 var copy = buffer.slice();
 #{yield `copy`}
 return;
 }
 for (var i = 0; i < self.length; i++) {
 buffer.push(self[i]);
 iterate(max, buffer, self);
 buffer.pop();
 }
 }
 iterate(num, [], self.slice());
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1682
def replace(other)
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 %x{
 self.splice(0, self.length);
 self.push.apply(self, other);
 }
 self
end

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# File 'opal/opal/corelib/array.rb', line 1697
def reverse
 `self.slice(0).reverse()`
end

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# File 'opal/opal/corelib/array.rb', line 1701
def reverse!
 `self.reverse()`
end

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# File 'opal/opal/corelib/array.rb', line 1705
def reverse_each(&block)
 return enum_for(:reverse_each) { size } unless block_given?
 reverse.each(&block)
 self
end

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# File 'opal/opal/corelib/array.rb', line 1712
def rindex(object = undefined, &block)
 %x{
 var i, value;
 if (object != null && block !== nil) {
 #{warn('warning: given block not used')}
 }
 if (object != null) {
 for (i = self.length - 1; i >= 0; i--) {
 if (i >= self.length) {
 break;
 }
 if (#{`self[i]` == `object`}) {
 return i;
 }
 }
 }
 else if (block !== nil) {
 for (i = self.length - 1; i >= 0; i--) {
 if (i >= self.length) {
 break;
 }
 value = block(self[i]);
 if (value !== false && value !== nil) {
 return i;
 }
 }
 }
 else if (object == null) {
 return #{enum_for :rindex};
 }
 return nil;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1751
def rotate(n = 1)
 %x{
 var ary, idx, firstPart, lastPart;
 n = $coerce_to(n, #{Integer }, 'to_int')
 if (self.length === 1) {
 return self.slice();
 }
 if (self.length === 0) {
 return [];
 }
 ary = self.slice();
 idx = n % ary.length;
 firstPart = ary.slice(idx);
 lastPart = ary.slice(0, idx);
 return firstPart.concat(lastPart);
 }
end

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# File 'opal/opal/corelib/array.rb', line 1773
def rotate!(cnt = 1)
 %x{
 if (self.length === 0 || self.length === 1) {
 return self;
 }
 cnt = $coerce_to(cnt, #{Integer }, 'to_int');
 }
 ary = rotate(cnt)
 replace ary
end

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# File 'opal/opal/corelib/array.rb', line 1798
def sample(count = undefined, options = undefined)
 return at Kernel .rand (`self.length`) if `count === undefined`
 if `options === undefined`
 if (o = Opal .coerce_to?  count, Hash , :to_hash)
 options = o
 count = nil
 else
 options = nil
 count = `$coerce_to(count, #{Integer }, 'to_int')`
 end
 else
 count = `$coerce_to(count, #{Integer }, 'to_int')`
 options = `$coerce_to(options, #{Hash }, 'to_hash')`
 end
 if count && `count < 0`
 raise ArgumentError , 'count must be greater than 0'
 end
 rng = options[:random] if options
 rng = if rng && rng.respond_to?(:rand)
 SampleRandom .new  rng
 else
 Kernel 
 end
 return `self[#{rng.rand(`self.length`)}]` unless count
 %x{
 var abandon, spin, result, i, j, k, targetIndex, oldValue;
 if (count > self.length) {
 count = self.length;
 }
 switch (count) {
 case 0:
 return [];
 break;
 case 1:
 return [self[#{rng.rand(`self.length`)}]];
 break;
 case 2:
 i = #{rng.rand(`self.length`)};
 j = #{rng.rand(`self.length`)};
 if (i === j) {
 j = i === 0 ? i + 1 : i - 1;
 }
 return [self[i], self[j]];
 break;
 default:
 if (self.length / count > 3) {
 abandon = false;
 spin = 0;
 result = #{ Array .new (count) };
 i = 1;
 result[0] = #{rng.rand(`self.length`)};
 while (i < count) {
 k = #{rng.rand(`self.length`)};
 j = 0;
 while (j < i) {
 while (k === result[j]) {
 spin++;
 if (spin > 100) {
 abandon = true;
 break;
 }
 k = #{rng.rand(`self.length`)};
 }
 if (abandon) { break; }
 j++;
 }
 if (abandon) { break; }
 result[i] = k;
 i++;
 }
 if (!abandon) {
 i = 0;
 while (i < count) {
 result[i] = self[result[i]];
 i++;
 }
 return result;
 }
 }
 result = self.slice();
 for (var c = 0; c < count; c++) {
 targetIndex = #{rng.rand(`self.length`)};
 oldValue = result[c];
 result[c] = result[targetIndex];
 result[targetIndex] = oldValue;
 }
 return count === self.length ? result : #{`result`[0, count]};
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 1909
def select(&block)
 return enum_for(:select) { size } unless block_given?
 %x{
 var result = [];
 for (var i = 0, length = self.length, item, value; i < length; i++) {
 item = self[i];
 value = $yield1(block, item);
 if ($truthy(value)) {
 result.push(item);
 }
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1929
def select!(&block)
 return enum_for(:select!) { size } unless block_given?
 %x{
 var original = self.length;
 #{ keep_if(&block) };
 return self.length === original ? nil : self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 1942
def shift(count = undefined)
 if `count === undefined`
 return if `self.length === 0`
 return `shiftNoArg(self)`
 end
 count = `$coerce_to(count, #{Integer }, 'to_int')`
 if `count < 0`
 raise ArgumentError , 'negative array size'
 end
 return [] if `self.length === 0`
 `self.splice(0, count)`
end

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# File 'opal/opal/corelib/array.rb', line 1961
def shuffle(rng = undefined)
 dup.to_a.shuffle!(rng)
end

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# File 'opal/opal/corelib/array.rb', line 1965
def shuffle!(rng = undefined)
 %x{
 var randgen, i = self.length, j, tmp;
 if (rng !== undefined) {
 rng = #{Opal .coerce_to? (rng, Hash , :to_hash)};
 if (rng !== nil) {
 rng = #{rng[:random]};
 if (rng !== nil && #{rng.respond_to?(:rand)}) {
 randgen = rng;
 }
 }
 }
 while (i) {
 if (randgen) {
 j = randgen.$rand(i).$to_int();
 if (j < 0) {
 #{raise RangeError , "random number too small #{`j`}"}
 }
 if (j >= i) {
 #{raise RangeError , "random number too big #{`j`}"}
 }
 }
 else {
 j = #{rand(`i`)};
 }
 tmp = self[--i];
 self[i] = self[j];
 self[j] = tmp;
 }
 return self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2008
def slice!(index, length = undefined)
 result = nil
 if `length === undefined`
 if Range  === index
 range = index
 result = self[range]
 range_start = `$coerce_to(range.begin, #{Integer }, 'to_int')`
 range_end = `$coerce_to(range.end, #{Integer }, 'to_int')`
 %x{
 if (range_start < 0) {
 range_start += self.length;
 }
 if (range_end < 0) {
 range_end += self.length;
 } else if (range_end >= self.length) {
 range_end = self.length - 1;
 if (range.excl) {
 range_end += 1;
 }
 }
 var range_length = range_end - range_start;
 if (range.excl) {
 range_end -= 1;
 } else {
 range_length += 1;
 }
 if (range_start < self.length && range_start >= 0 && range_end < self.length && range_end >= 0 && range_length > 0) {
 self.splice(range_start, range_length);
 }
 }
 else
 start = `$coerce_to(index, #{Integer }, 'to_int')`
 %x{
 if (start < 0) {
 start += self.length;
 }
 if (start < 0 || start >= self.length) {
 return nil;
 }
 result = self[start];
 if (start === 0) {
 self.shift();
 } else {
 self.splice(start, 1);
 }
 }
 end
 else
 start = `$coerce_to(index, #{Integer }, 'to_int')`
 length = `$coerce_to(length, #{Integer }, 'to_int')`
 %x{
 if (length < 0) {
 return nil;
 }
 var end = start + length;
 result = #{self[start, length]};
 if (start < 0) {
 start += self.length;
 }
 if (start + length > self.length) {
 length = self.length - start;
 }
 if (start < self.length && start >= 0) {
 self.splice(start, length);
 }
 }
 end
 result
end

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# File 'opal/opal/corelib/array.rb', line 2093
def sort(&block)
 return self unless `self.length > 1`
 %x{
 if (block === nil) {
 block = function(a, b) {
 return #{`a` <=> `b`};
 };
 }
 return self.slice().sort(function(x, y) {
 var ret = block(x, y);
 if (ret === nil) {
 #{raise ArgumentError , "comparison of #{`x`.inspect} with #{`y`.inspect} failed"};
 }
 return #{`ret` > 0} ? 1 : (#{`ret` < 0} ? -1 : 0);
 });
 }
end

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# File 'opal/opal/corelib/array.rb', line 2115
def sort!(&block)
 %x{
 var result;
 if (#{block_given?}) {
 result = #{`self.slice()`.sort(&block)};
 }
 else {
 result = #{`self.slice()`.sort};
 }
 self.length = 0;
 for(var i = 0, length = result.length; i < length; i++) {
 self.push(result[i]);
 }
 return self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2135
def sort_by!(&block)
 return enum_for(:sort_by!) { size } unless block_given?
 replace sort_by(&block)
end

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# File 'opal/opal/corelib/array.rb', line 2141
def take(count)
 %x{
 if (count < 0) {
 #{raise ArgumentError };
 }
 return self.slice(0, count);
 }
end

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# File 'opal/opal/corelib/array.rb', line 2151
def take_while(&block)
 %x{
 var result = [];
 for (var i = 0, length = self.length, item, value; i < length; i++) {
 item = self[i];
 value = block(item);
 if (value === false || value === nil) {
 return result;
 }
 result.push(item);
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2171
def to_a
 %x{
 if (self.$$class === Opal.Array) {
 return self;
 }
 else {
 return Opal.Array.$new(self);
 }
 }
end

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# File 'opal/opal/corelib/array.rb', line 2182
def to_ary
 self
end

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# File 'opal/opal/corelib/array.rb', line 2186
def to_h(&block)
 array = self
 array = array.map(&block) if block_given?
 %x{
 var i, len = array.length, ary, key, val, hash = #{{}};
 for (i = 0; i < len; i++) {
 ary = #{Opal .coerce_to? (`array[i]`, Array , :to_ary)};
 if (!ary.$$is_array) {
 #{raise TypeError , "wrong element type #{`ary`.class} at #{`i`} (expected array)"}
 }
 if (ary.length !== 2) {
 #{raise ArgumentError , "wrong array length at #{`i`} (expected 2, was #{`ary`.length})"}
 }
 key = ary[0];
 val = ary[1];
 $hash_put(hash, key, val);
 }
 return hash;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2212
def transpose
 return [] if empty?
 result = []
 max = nil
 each do |row|
 row = if Array  === row
 row.to_a
 else
 `$coerce_to(row, #{Array }, 'to_ary')`.to_a
 end
 max ||= `row.length`
 if `row.length` != max
 raise IndexError , "element size differs (#{`row.length`} should be #{max})"
 end
 `row.length`.times do |i|
 entry = (result[i] ||= [])
 entry << row.at(i)
 end
 end
 result
end

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# File 'opal/opal/corelib/array.rb', line 2240
def union(*arrays)
 arrays.reduce(uniq) { |a, b| a | b }
end

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# File 'opal/opal/corelib/array.rb', line 2244
def uniq(&block)
 %x{
 var hash = #{{}}, i, length, item, key;
 if (block === nil) {
 for (i = 0, length = self.length; i < length; i++) {
 item = self[i];
 if ($hash_get(hash, item) === undefined) {
 $hash_put(hash, item, item);
 }
 }
 }
 else {
 for (i = 0, length = self.length; i < length; i++) {
 item = self[i];
 key = $yield1(block, item);
 if ($hash_get(hash, key) === undefined) {
 $hash_put(hash, key, item);
 }
 }
 }
 return #{`hash`.values};
 }
end

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# File 'opal/opal/corelib/array.rb', line 2270
def uniq!(&block)
 %x{
 var original_length = self.length, hash = #{{}}, i, length, item, key;
 for (i = 0, length = original_length; i < length; i++) {
 item = self[i];
 key = (block === nil ? item : $yield1(block, item));
 if ($hash_get(hash, key) === undefined) {
 $hash_put(hash, key, item);
 continue;
 }
 self.splice(i, 1);
 length--;
 i--;
 }
 return self.length === original_length ? nil : self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2292
def unshift(*objects)
 %x{
 var selfLength = self.length
 var objectsLength = objects.length
 if (objectsLength == 0) return self;
 var index = selfLength - objectsLength
 for (var i = 0; i < objectsLength; i++) {
 self.push(self[index + i])
 }
 var len = selfLength - 1
 while (len - objectsLength >= 0) {
 self[len] = self[len - objectsLength]
 len--
 }
 for (var j = 0; j < objectsLength; j++) {
 self[j] = objects[j]
 }
 return self;
 }
end

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# File 'opal/opal/corelib/array.rb', line 2315
def values_at(*args)
 out = []
 args.each do |elem|
 if elem.is_a? Range 
 finish = `$coerce_to(#{elem.last}, #{Integer }, 'to_int')`
 start = `$coerce_to(#{elem.first}, #{Integer }, 'to_int')`
 %x{
 if (start < 0) {
 start = start + self.length;
 #{next};
 }
 }
 %x{
 if (finish < 0) {
 finish = finish + self.length;
 }
 if (#{elem.exclude_end?}) {
 finish--;
 }
 if (finish < start) {
 #{next};
 }
 }
 start.upto(finish) { |i| out << at(i) }
 else
 i = `$coerce_to(elem, #{Integer }, 'to_int')`
 out << at(i)
 end
 end
 out
end

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# File 'opal/opal/corelib/array.rb', line 2352
def zip(*others, &block)
 %x{
 var result = [], size = self.length, part, o, i, j, jj;
 for (j = 0, jj = others.length; j < jj; j++) {
 o = others[j];
 if (o.$$is_array) {
 continue;
 }
 if (o.$$is_range || o.$$is_enumerator) {
 others[j] = o.$take(size);
 continue;
 }
 others[j] = #{(
 Opal .coerce_to? (`o`, Array , :to_ary) ||
 Opal .coerce_to! (`o`, Enumerator , :to_enum, :each)
 ).to_a};
 }
 for (i = 0; i < size; i++) {
 part = [self[i]];
 for (j = 0, jj = others.length; j < jj; j++) {
 o = others[j][i];
 if (o == null) {
 o = nil;
 }
 part[j + 1] = o;
 }
 result[i] = part;
 }
 if (block !== nil) {
 for (i = 0; i < size; i++) {
 block(result[i]);
 }
 return nil;
 }
 return result;
 }
end

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# File 'opal/opal/corelib/array.rb', line 160
def |(other)
 other = if Array  === other
 other.to_a
 else
 `$coerce_to(other, #{Array }, 'to_ary')`.to_a
 end
 %x{
 var hash = #{{}}, i, length, item;
 for (i = 0, length = self.length; i < length; i++) {
 $hash_put(hash, self[i], true);
 }
 for (i = 0, length = other.length; i < length; i++) {
 $hash_put(hash, other[i], true);
 }
 return hash.$keys();
 }
end