This article describes the continued operation of the common definition of Node-RED in an array of elements, split, merge and display.
a
In a way to start the container Node-RED service startup command as follows:
Start command: docker run -it -p 1880: 1880 -v $ PWD / data: / data -e TZ = Asia / Shanghai --name nodered -d nodered / nodered: 1.0.4
Definition array
Inject use node, wherein providing an array of JSON format defined manner, as shown
Node-RED also provides a simple JSON editor, can enter directly
select the format JSON format can
be selected visual editor the way
The results show an array
Debug a connection types of nodes, after deployment, manually click the trigger Inject node, you can direct the array results show
Split Array
Create a default node for splitting the split arrays
is connected, after the deployment of the results of the following
Digital operation: rounding
For an array of spin-off operation that generates a digital rounding dropping the fractional processing node can use round
connector, deployment, then the results shown below, can be seen in FIG have been rounded up
Array merge
After the individual elements are recombined process, you can use the join node, default settings here to be
connected to the deployment, then the results shown below, can be seen in FIG array has a combined output
JSON format flow
[{"id":"bff77d9a.20b6c","type":"inject","z":"73554227.4474dc","name":"数字数组输入","topic":"","payload":"[1,2.2,3.345,4.456,5.567]","payloadType":"json","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":150,"y":120,"wires":[["1e13c184.78c3be"]]},{"id":"b4c533a9.3a2e3","type":"debug","z":"73554227.4474dc","name":"数组结果显示","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":540,"y":220,"wires":[]},{"id":"1e13c184.78c3be","type":"split","z":"73554227.4474dc","name":"拆分数组","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":340,"y":120,"wires":[["8054bdc5.ae709"]]},{"id":"8054bdc5.ae709","type":"range","z":"73554227.4474dc","minin":"0","maxin":"100","minout":"0","maxout":"100","action":"scale","round":true,"property":"payload","name":"数字舍五入","x":530,"y":120,"wires":[["71a9d002.49773"]]},{"id":"71a9d002.49773","type":"join","z":"73554227.4474dc","name":"合并数组","mode":"auto","build":"string","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":false,"timeout":"","count":"","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":340,"y":220,"wires":[["b4c533a9.3a2e3"]]}]
