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[DOC] Tweaks for Hash.new

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BurdetteLamar 2025-01-23 08:56:15 -06:00 committed by Peter Zhu
parent f6e259da87
commit 22e5d83cd1
Notes: git 2025-01-24 15:44:41 +00:00 
Merged: https://github.com/ruby/ruby/pull/12620
1 changed files with 7 additions and 3 deletions
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10
hash.rb
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@ -4,8 +4,10 @@ class Hash
# Hash.new(capacity: 0) {|self, key| ... } -> new_hash
#
# Returns a new empty \Hash object.
#
# Initializes the values of Hash#default and Hash#default_proc,
# which determine the value to be returned by method Hash#[] when the entry does not exist.
# which determine the behavior when a given key is not found;
# see {Key Not Found?}[rdoc-ref:Hash@Key+Not+Found-3F].
#
# By default, a hash has +nil+ values for both +default+ and +default_proc+:
#
@ -13,19 +15,21 @@ class Hash
# h.default # => nil
# h.default_proc # => nil
#
# If the +default_value+ argument is provided, it sets the +default+ value for the hash:
# With argument +default_value+ given, sets the +default+ value for the hash:
#
# h = Hash.new(false) # => {}
# h.default # => false
# h.default_proc # => nil
#
# If a block is given, it sets the +default_proc+ value:
# With a block given, sets the +default_proc+ value:
#
# h = Hash.new {|hash, key| "Hash #{hash}: Default value for #{key}" }
# h.default # => nil
# h.default_proc # => #<Proc:0x00000289b6fa7048 (irb):185>
# h[:nosuch] # => "Hash {}: Default value for nosuch"
#
# Raises ArgumentError if both +default_value+ and a block are given.
#
# If optional keyword argument +capacity+ is given with a positive integer value +n+,
# initializes the hash with enough capacity to accommodate +n+ entries without resizing.
#