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Compression:
Stored size: 990 Bytes
Contents
module Kernel
module_function
# For debugging and showing examples. Currently this
# takes an argument of a string in a block.
#
# demo {%{ a = [1,2,3] }}
# demo {%{ a.slice(1,2) }}
# demo {%{ a.map { |x| x**3 } }}
#
# Produces:
#
# a = [1,2,3] #=> [1, 2, 3]
# a.slice(1,2) #=> [2, 3]
# a.map { |x| x**3 } #=> [1, 8, 27]
#
#--
# Is there a way to do this without the eval string in block?
# Preferably just a block and no string.
#++
def demo(out=$stdout,&block)
out << sprintf("%-25s#=> %s\n", expr = block.call, eval(expr, block.binding).inspect)
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCKernel < Test::Unit::TestCase
def test_demo
demo(i=''){%{ a = [1,2,3] }}
o = " a = [1,2,3] #=> [1, 2, 3]\n"
assert_equal( o, i )
end
end
=end
Version data entries
16 entries across 16 versions & 1 rubygems