Sha256: 041ab5618f363a277f64fedeb06ead93700771fab7491ce8c96a6600e9050801
Contents?: true
Size: 947 Bytes
Versions: 6
Compression:
Stored size: 947 Bytes
Contents
class Symbol
unless method_defined?(:to_proc) # 1.8.7+
# Turn a symbol into a proc calling the method to
# which it refers.
#
# up = :upcase.to_proc
# up.call("hello") #=> HELLO
#
# More useful is the fact that this allows <tt>&</tt>
# to be used to coerce Symbol into Proc.
#
# %w{foo bar qux}.map(&:upcase) #=> ["FOO","BAR","QUX"]
# [1, 2, 3].inject(&:+) #=> 6
#
# And other conveniences such as:
#
# %{john terry fiona}.map(&:capitalize) # -> %{John Terry Fiona}
# sum = numbers.inject(&:+)
#
# TODO: This will be deprecated as of Ruby 1.9, since it will become standard Ruby.
#
# CREDIT: Florian Gross (orignal), Nobuhiro Imai (current)
def to_proc
Proc.new{|*args| args.shift.__send__(self, *args)}
end
# OLD DEFINITION
#def to_proc
# proc { |obj, *args| obj.send(self, *args) }
#end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems