I have several messages of type {msg: Object object value1: "v1" value2: "v2" value3: "v3" value4: "v4" _msgid: "xxxx"} and I would like to combine them into one array msg [0]: value1: " v1 "value2:" v2 "value3:" v3 "value4:" v4 "_msgid:" xxxx "
msg [1]: value1: "v1a" value2: "v2a" value3: "v3a" value4: "v4a" _msgid: "xxxxa"
....
msg [n]: value1: "v1n" value2: "v2n" value3: "v3n" value4: "v4n" _msgid: "xxxxn".
Unfortunately, I can't get it through the node "Join". Please give me a hint how I can do it
Well neither of the examples you give are valid json so it's going to be hard to guess exactly what you mean....
Flow
[{"id":"5d1aab30.471e04","type":"debug","z":"d0071538.bb23f8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":590,"y":3580,"wires":[]},{"id":"dc7a513f.41bf3","type":"join","z":"d0071538.bb23f8","name":"","mode":"custom","build":"merged","property":"","propertyType":"full","key":"topic","joiner":"\\n","joinerType":"str","accumulate":false,"timeout":"","count":"","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"num","reduceFixup":"","x":470,"y":3720,"wires":[["5d1aab30.471e04","2fed6b5d.7e8984"]]},{"id":"78eee376.7b1bac","type":"debug","z":"d0071538.bb23f8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":810,"y":3720,"wires":[]},{"id":"2fed6b5d.7e8984","type":"ui_template","z":"d0071538.bb23f8","group":"5e69aaae.44d674","name":"Data-table","order":1,"width":13,"height":6,"format":"<style>\n th {\n text-decoration: underline;\n }\n .numeric {\n text-align: right;\n padding-right: 15px;\n }\n</style>\n\n\n<table cellpadding=\"1\" border=\"1\" id=\"table1\" class=\"table-hover\" style=\"width: 100%;\">\n <thead>\n <tr>\n <th>No</th> \n <th>Header1</th> \n <th>Header2</th>\n <th>Header3</th>\n <th>header4</th>\n </tr>\n </thead>\n <tbody>\n <tr ng-repeat=\"row in msg.payload\">\n <td style=\"width: 3%\" class=\"numeric\" >{{row.value1}}</td>\n <td>{{row.value2}}</td>\n <td style=\"width: 10%\">{{row.value3}}</td>\n <td style=\"width: 10%\">{{row.value4}}</td>\n <td style=\"width: 10%\">{{row.value5}}\n </tr>\n </tbody>\n</table>\n\n<script>\n(function($scope) {\n var array = [];\nvar table = document.querySelector(\"table tbody\");\nvar rows = table.children;\nfor (var i = 0; i < rows.length; i++) {\n\tvar fields = rows[i].children;\n var rowArray = [];\n for (var j = 0; j < fields.length; j++){\n rowArray.push(fields[j].innerHTML);\n }\n array.push(rowArray);\n} \n $scope.sendRow = function(obj) {\n$scope.send({ \"payload\": array });\n }; \n})(scope);\n</script>\n\n<!--script>\n(function($scope) {\n $scope.sendRow = function(obj) {\n $scope.send({ \"payload\": obj });\n $scope.send({ \"payload\": (document.getElementById(\"table1\").rows[1].innerHTML) });\n };\n})(scope);\n</script-->","storeOutMessages":false,"fwdInMessages":false,"templateScope":"local","x":650,"y":3720,"wires":[["78eee376.7b1bac"]]},{"id":"28b78355.776b4c","type":"inject","z":"d0071538.bb23f8","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":140,"y":3700,"wires":[["6e3a2df0.68b844"]]},{"id":"b23e0b63.005068","type":"inject","z":"d0071538.bb23f8","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":140,"y":3760,"wires":[["b6d4913d.26c54"]]},{"id":"a19df461.82a7e8","type":"function","z":"d0071538.bb23f8","name":"dummyarray expected","func":"var myArray =[\n{ \"value1\": \"v1a\", \"value2\": \"v2a\", \"value3\": \"v3a\", \"value4\": \"v4a\", \"value5\": \"v5a\"},\n{ \"value1\": \"v1b\", \"value2\": \"v2b\", \"value3\": \"v3b\", \"value4\": \"v4b\", \"value5\": \"v5b\"},\n];\nmsg.payload = myArray;\nreturn msg;","outputs":1,"noerr":0,"x":740,"y":3880,"wires":[["2fed6b5d.7e8984"]]},{"id":"6e3a2df0.68b844","type":"function","z":"d0071538.bb23f8","name":"dummyarray 1","func":"msg={\nvalue1: \"v1a\",\nvalue2: \"v2a\",\nvalue3: \"v3a\",\nvalue4: \"v4a\",\n};\nreturn msg;","outputs":1,"noerr":0,"x":320,"y":3700,"wires":[["dc7a513f.41bf3","cca46d0b.6b672"]]},{"id":"b6d4913d.26c54","type":"function","z":"d0071538.bb23f8","name":"dummyarray 2","func":"msg={\nvalue1: \"v1b\",\nvalue2: \"v2b\",\nvalue3: \"v3b\",\nvalue4: \"v4b\",\n};\nreturn msg;","outputs":1,"noerr":0,"x":320,"y":3760,"wires":[["dc7a513f.41bf3","b44d7d3.85c908"]]},{"id":"cca46d0b.6b672","type":"debug","z":"d0071538.bb23f8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":330,"y":3640,"wires":[]},{"id":"b44d7d3.85c908","type":"debug","z":"d0071538.bb23f8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":330,"y":3840,"wires":[]},{"id":"276a9a5e.584586","type":"comment","z":"d0071538.bb23f8","name":"expected outcome ","info":"","x":590,"y":3820,"wires":[]},{"id":"553a3f8a.57dc3","type":"inject","z":"d0071538.bb23f8","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":560,"y":3880,"wires":[["a19df461.82a7e8"]]},{"id":"5e69aaae.44d674","type":"ui_group","z":"","name":"Torrrenty na RPi","tab":"d285a0a4.78899","disp":true,"width":"13","collapse":false},{"id":"d285a0a4.78899","type":"ui_tab","z":"","name":"Home","icon":"home","order":1}]
Try it like this:
[{"id":"ed8c1e32.c79e28","type":"debug","z":"402f1c98.9dab44","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":746,"y":216,"wires":[]},{"id":"b67fdfde.581e3","type":"join","z":"402f1c98.9dab44","name":"","mode":"custom","build":"array","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":false,"timeout":"","count":"","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"num","reduceFixup":"","x":602,"y":216,"wires":[["ed8c1e32.c79e28"]]},{"id":"1d26a4f2.ef830b","type":"inject","z":"402f1c98.9dab44","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":132,"y":192,"wires":[["7114cd0e.b5e264"]]},{"id":"a6ccc9d1.76d2e","type":"inject","z":"402f1c98.9dab44","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":132,"y":252,"wires":[["e7e55a26.963b8"]]},{"id":"7114cd0e.b5e264","type":"function","z":"402f1c98.9dab44","name":"dummyarray 1","func":"msg.payload={\nvalue1: \"v1a\",\nvalue2: \"v2a\",\nvalue3: \"v3a\",\nvalue4: \"v4a\",\n};\nreturn msg;","outputs":1,"noerr":0,"x":312,"y":192,"wires":[["479fdca0.35c75c"]]},{"id":"e7e55a26.963b8","type":"function","z":"402f1c98.9dab44","name":"dummyarray 2","func":"msg.payload={\nvalue1: \"v1b\",\nvalue2: \"v2b\",\nvalue3: \"v3b\",\nvalue4: \"v4b\",\n};\nreturn msg;","outputs":1,"noerr":0,"x":312,"y":252,"wires":[["479fdca0.35c75c"]]},{"id":"479fdca0.35c75c","type":"batch","z":"402f1c98.9dab44","name":"","mode":"count","count":"2","overlap":0,"interval":10,"allowEmptySequence":false,"topics":[],"x":482,"y":216,"wires":[["b67fdfde.581e3"]]}]
Note that I have changed both objects to msg.payload (instead of msg), then use the batch node to combine them and the join node to merge them into an array of objects.
Thank you for the hint :). After minor changes I adapted to my needs 
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