Sha256: cf2585f400e21378cd760d8b10483e0c87157fbbf01d1a5429bb1402d146df68
Contents?: true
Size: 823 Bytes
Versions: 12
Compression:
Stored size: 823 Bytes
Contents
#--
# Credit goes to Florian Gross (flgr).
#++
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
#
def to_proc
lambda { |obj, *args| obj.send(self, *args) }
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCSymbol < Test::Unit::TestCase
def test_to_proc
assert_instance_of(Proc, up = :upcase.to_proc )
assert_equal( "HELLO", up.call("hello") )
end
end
=end
Version data entries
12 entries across 12 versions & 1 rubygems