1 3 2 isArray.length = 1 3 false 4 true 5 join.length = 1 6 javascript<->is<->great 7 every.length = 1 8 4,56,5 every even? = false 9 4,56,688 every even? = true 10 some.length = 1 11 4,56,5 some even? = true 12 3,5,17 some even? = false 13 forEach.length = 1 14 java,javascript,jython,jruby[0] is java 15 java,javascript,jython,jruby[1] is javascript 16 java,javascript,jython,jruby[2] is jython 17 java,javascript,jython,jruby[3] is jruby 18 JAVA,JAVASCRIPT,JYTHON,JRUBY 19 shifted is java, remaining is javascript,jython,jruby, length is 3 20 java,javascript 21 115 22 120 23 c++ java javascript objective c 24 hello world from javascript 25 indexOf.length = 1 26 indexOf('java') = 0 27 indexOf('javascript') = 1 28 indexOf('javascript', 3) = -1 29 indexOf('c++') = -1 30 [].indexOf('any') = -1 31 lastIndexOf.length = 1 32 lastIndexOf('java') = 4 33 lastIndexOf('jython') = 5 34 lastIndexOf('c') = 6 35 lastIndexOf('c++') = -1 36 [].lastIndexOf('any') = -1 37 concat.length = 1 38 foo,bar,x,y,34,sss,3,4,2 39 Array.length = 1 40 NaN,NaN,NaN 41 3 42 1 43 number 44 1 45 46 hello,world 47 ,,,, 48 undefined 49 [object java.lang.Object] 50 51 33