Gavin Sinclair gsinclair

gsinclair / gist:479572

Created July 17, 2010 15:22

Ruby 1.9.2-rc1: instance_eval can't handle a lambda (needs a proc)

	class InstanceEval
	def initialize(code)
	@code = code
	@context = Object.new
	end

	def run
	code = @code
	result = @context.instance_eval(&code)
	"* run --> #{result.inspect}"

gsinclair / triangle_test.rb

Created October 15, 2009 13:26

Demonstrates use of Object#tap in unit testing. Small gain in neatness.

	class TestTriangle < Test::Unit::TestCase

	def test_isosceles_given_base_and_height
	triangle(:ABC, :isosceles, :base => 5, :height :=> 9).tap do \|t\|
	assert_point_equal p(2.5,9), t.apex
	assert_point_equal p(0,0), @register[:A]
	assert_point_equal p(5,0), @register[:B]
	assert_point_equal p(2.5,9), @register[:C]
	assert_equal t, @register.retrieve(:triangle, :ABC)
	end