Class: Enumerator
Direct Known Subclasses
Lazy
Defined Under Namespace
Classes: Generator, Lazy, Yielder
Class Method Summary
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Instance Method Summary
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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, #enumerator_size, #find_all, #find_index, #first, #grep, #group_by, #include?, #inject, #lazy, #max, #max_by, #min, #min_by, #minmax, #minmax_by, #none?, #one?, #partition, #reject, #reverse_each, #slice_before, #sort, #sort_by, #take, #take_while, #zip
Constructor Details
#initialize(&block) ⇒ Enumerator
Returns a new instance of Enumerator
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# File 'opal/opal/corelib/enumerator.rb', line 22
def initialize(*, &block)
if block
@object = Generator.new(&block)
@method = :each
@args = []
@size = `arguments[0] || nil`
if @size
@size = Opal.coerce_to @size, Integer, :to_int
end
else
@object = `arguments[0]`
@method = `arguments[1] || "each"`
@args = `$slice.call(arguments, 2)`
@size = nil
end
end
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Class Method Details
.for(object, method = :each, *args, &block) ⇒ Object
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# File 'opal/opal/corelib/enumerator.rb', line 8
def self.for(object, method = :each, *args, &block)
%x{
var obj = #{allocate};
obj.object = object;
obj.size = block;
obj.method = method;
obj.args = args;
return obj;
}
end
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Instance Method Details
#each(*args, &block) ⇒ Object
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# File 'opal/opal/corelib/enumerator.rb', line 40
def each(*args, &block)
return self if block.nil? && args.empty?
args = @args + args
return self.class.new(@object, @method, *args) if block.nil?
@object.__send__(@method, *args, &block)
end
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# File 'opal/opal/corelib/enumerator.rb', line 92
def inspect
result = "#<#{self.class}: #{@object.inspect}:#{@method}"
unless @args.empty?
result += "(#{@args.inspect[Range.new(1, -2)]})"
end
result + ">"
end
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# File 'opal/opal/corelib/enumerator.rb', line 50
def size
Proc === @size ? @size.call(*@args) : @size
end
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#with_index(offset = 0, &block) ⇒ Object
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# File 'opal/opal/corelib/enumerator.rb', line 54
def with_index(offset = 0, &block)
if offset
offset = Opal.coerce_to offset, Integer, :to_int
else
offset = 0
end
return enum_for(:with_index, offset){self.size} unless block
%x{
var result, index = offset;
self.$each.$$p = function() {
var param = #{Opal.destructure(`arguments`)},
value = block(param, index);
if (value === $breaker) {
result = $breaker.$v;
return $breaker;
}
index++;
return value;
}
self.$each();
if (result !== undefined) {
return result;
}
return self.object;
}
end
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