Sha256: 7eacdad10eb4844ce3de78c3e3ad9c81af99551c6ce236cd78167350ecc67647
Contents?: true
Size: 834 Bytes
Versions: 7
Compression:
Stored size: 834 Bytes
Contents
class Symbol
# 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)
# CREDIT Nobuhiro Imai (current)
def to_proc
Proc.new{|*args| args.shift.__send__(self, *args)}
end
#def to_proc
# proc { |obj, *args| obj.send(self, *args) }
#end
end
Version data entries
7 entries across 7 versions & 1 rubygems