Sha256: 415f85ff534fe15e1eeeb852a260180bba4ca635dc90caac38c2f32a97a6d542
Contents?: true
Size: 1.26 KB
Versions: 7
Compression:
Stored size: 1.26 KB
Contents
require 'facets/functor'
require 'facets/enumerable/recursively'
class Array
# Apply a method to array, and recursively apply that method
# to each sub-array or +types+.
#
# arr = ["a", ["b", "c"]]
# arr.recursively.map{ |v| v.to_sym }
# #=> [:a, [:b, :c]]
#
# By default the sub-types are passed thru uneffected. Passing a block
# to #recursively changes this.
#
# arr = ["a", ["b", "c"]]
# arr.recursively{ |a| a.reverse }.map{ |v| v.to_sym }
# #=> [:a, [:c, :b]]
#
# TODO: Return Enumerator if no +yld+ block is given ?
def recursively(*types, &block)
Recursor.new(self, *types, &block)
end
## TODO: When no longer needing to support 1.8.6 we could get rid of
## the Recursor class and use:
##
## def recursively(*types, &block)
## types = types.empty? ? [self.class] : types
## Functor.new do |op, &yld|
## rec = block || lambda{ |a| a }
## yld = yld || lambda{ |v| v } # ? to_enum
## __send__(op) do |v|
## case v
## when String # b/c of 1.8
## yld.call(v)
## when *types
## res = v.recursively(*types, &block).__send__(op,&yld)
## rec.call(res)
## else
## yld.call(v)
## end
## end
## end
## end
end
Version data entries
7 entries across 6 versions & 1 rubygems