Mruby & Me - Speaker Deck

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Mruby & Me Seb Jacobs Monday, 11 February 13

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Matz’s Dream ﬂickr/moofbong Ruby for everyone, everywhere! Monday, 11 February 13

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So many rubies? JRuby, Rubinius, Topaz, ... why do we need another one? Monday, 11 February 13

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What is mruby? lightweight ISO-compliant ruby small memory footprint ruby for embedded systems Monday, 11 February 13

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mruby is the same but different • compile mruby to bytecode • modular library system • no regexps by default • no standard library • no require! Monday, 11 February 13

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Hello bytecode $ mruby -e 'puts "hello lrug";' --verbose 000 OP_LOADSELF!R1 001 OP_STRING! R2! "hello lrug" 002 OP_SEND! R1! :puts! 1 003 OP_STOP Monday, 11 February 13

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C calling Ruby #include #include int main(void) { mrb_state *mrb = mrb_open(); char code[] = "p 'hello world!'"; printf("Executing Ruby code from C!\n"); mrb_load_string(mrb, code); return 0; } https://github.com/mruby/mruby/wiki/Hello-World Monday, 11 February 13

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Use it with your favourite language! Ruby in Lua Ruby in PHP Ruby in Node.js! Monday, 11 February 13

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php-mruby $mrb = new Mruby(); $mrb->assign('$myname','sebjacobs'); $mrb->run('puts $myname'); https://github.com/chobie/php-mruby Monday, 11 February 13

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Embedded Ruby! Ruby in your fridge Ruby on your TV Ruby on Wheels! Monday, 11 February 13

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Build mobile apps with Mobiruby or Jamruby Monday, 11 February 13

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mod_mruby r = Apache::Request.new() Apache.rputs("redirecting request!") r.filename = "/var/www/html/redirect.html" Apache::return(Apache::OK) https://github.com/matsumoto-r/mod_mruby Monday, 11 February 13

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WebRuby https://qiezi.me/projects/webruby-tutorial/ Monday, 11 February 13

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MTest class Test4MTest < MTest::Unit::TestCase def test_assert_empty assert_empty([], 'array empty') end def test_assert_equal assert_equal('', nil.to_s) end def test_assert_includes assert_includes([1,2,3], 1) end def test_assert_instance_of assert_instance_of Class, Array end end MTest::Unit.new.run https://github.com/iij/mruby-mtest Monday, 11 February 13

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Get involved! Monday, 11 February 13

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Module#constants assert('Module#constants', '15.2.2.4.24') do ! module Test4constants ! ! Const4Test4constant = 24 ! end ! module Test4constants2 ! ! include Test4constants ! ! Const4Test4constant2 = 42 ! end ! Test4constants.constants == [:Const4Test4constant] ! Test4constants2.constants == [:Const4Test4constant2] end Monday, 11 February 13

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Module#constants mrb_value mrb_mod_constants(mrb_state *mrb, mrb_value mod) { ! mrb_value ary; ! ary = mrb_ary_new(mrb); ! if (obj_iv_p(mod) && mrb_obj_ptr(mod)->iv) ! { iv_foreach(mrb, mrb_obj_ptr(mod)->iv, const_i, &ary); ! } ! return ary; } Monday, 11 February 13

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The future? mruby-ruby Monday, 11 February 13

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Check out • github.com/mruby/mruby • mruby.sh • github.com/iij/mruby Monday, 11 February 13

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I’m @sebjacobs any questions? Monday, 11 February 13