зеркало из https://github.com/github/ruby.git
41 строка
1.6 KiB
Ruby
41 строка
1.6 KiB
Ruby
class Hash
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# call-seq:
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# Hash.new(default_value = nil) -> new_hash
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# Hash.new(default_value = nil, capacity: size) -> new_hash
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# Hash.new {|hash, key| ... } -> new_hash
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# Hash.new(capacity: size) {|hash, key| ... } -> new_hash
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#
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# Returns a new empty +Hash+ object.
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#
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# The initial default value and initial default proc for the new hash
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# depend on which form above was used. See {Default Values}[rdoc-ref:Hash@Default+Values].
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#
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# If neither an argument nor a block is given,
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# initializes both the default value and the default proc to <tt>nil</tt>:
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# h = Hash.new
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# h.default # => nil
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# h.default_proc # => nil
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#
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# If argument <tt>default_value</tt> is given but no block is given,
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# initializes the default value to the given <tt>default_value</tt>
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# and the default proc to <tt>nil</tt>:
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# h = Hash.new(false)
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# h.default # => false
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# h.default_proc # => nil
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#
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# If a block is given but no <tt>default_value</tt>, stores the block as the default proc
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# and sets the default value to <tt>nil</tt>:
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# h = Hash.new {|hash, key| "Default value for #{key}" }
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# h.default # => nil
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# h.default_proc.class # => Proc
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# h[:nosuch] # => "Default value for nosuch"
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#
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# If both a block and a <tt>default_value</tt> are given, raises an +ArgumentError+
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#
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# If the optional keyword argument +capacity+ is given, the hash will be allocated
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# with enough capacity to accomodate this many keys without having to be resized.
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def initialize(ifnone = (ifnone_unset = true), capacity: 0, &block)
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Primitive.rb_hash_init(capacity, ifnone_unset, ifnone, block)
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end
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end
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