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Implement Array#fetch_values

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[Feature #20702]

Works the same way than `Hash#fetch_values` for for array.
This commit is contained in:
Jean Boussier 2024-09-05 20:00:32 +02:00
parent 214668fccb
commit bc85c8d852
Notes: git 2024-09-06 10:40:50 +00:00
2 changed files with 70 additions and 0 deletions
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22
array.rb
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@ -210,4 +210,26 @@ class Array
end
end
end
# call-seq:
# array.fetch_values(*indexes) -> new_array
# array.fetch_values(*indexes) {|key| ... } -> new_array
#
# Returns a new Array containing the values associated with the given indexes *indexes:
# a = [:foo, :bar, :baz]
# a.fetch_values(3, 1) # => [:baz, :foo]
#
# Returns a new empty Array if no arguments given.
#
# When a block is given, calls the block with each missing index,
# treating the block's return value as the value for that index:
# a = [:foo, :bar, :baz]
# values = a.fetch_values(1, 0, 42, 777) {|index| index.to_s}
# values # => [:bar, :foo, "42", "777"]
#
# When no block is given, raises an exception if any given key is not found.
def fetch_values(*indexes, &block)
indexes.map! { |i| fetch(i, &block) }
indexes
end
end