https://github.com/hcl-tech-software/node-red-contrib-hcl-iterate-loop

This Node-RED node allows you to build loops, just like a for loop in any programming language do, iterating over the selected parts in the flow. Playing with the starting point, increment/decrement values and condition to be evaluated in each iteration.
https://github.com/hcl-tech-software/node-red-contrib-hcl-iterate-loop

loops model-realtime node-red node-red-contrib

Last synced: 4 months ago
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This Node-RED node allows you to build loops, just like a for loop in any programming language do, iterating over the selected parts in the flow. Playing with the starting point, increment/decrement values and condition to be evaluated in each iteration.

• Host: GitHub
• URL: https://github.com/hcl-tech-software/node-red-contrib-hcl-iterate-loop
• Owner: HCL-TECH-SOFTWARE
• License: apache-2.0
• Created: 2020-10-26T08:42:48.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-11-30T18:02:46.000Z (over 5 years ago)
• Last Synced: 2025-07-29T20:40:34.460Z (11 months ago)
• Topics: loops, model-realtime, node-red, node-red-contrib
• Language: HTML
• Homepage:
• Size: 167 KB
• Stars: 0
• Watchers: 3
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# node-red-contrib-hcl-iterate-loop

Node-RED node to build loops and interact with others nodes in a flow.

Basically working like a `for loop`.

## Config iterate-loop

Below are the inputs properties required to make it possible.

- Variable name, that can be associated to a context variable(`msg`, `flow`, `global`).

- Value to start the loop, can be a number or a variable from a context(`msg`, `flow`, `global`).

- Condition to finish the loop, choosing from an operator (`==`, `<`, `<=`, `>`, `>=`) and a value to compare with (`number`, `msg`, `flow`, `global`).

- Increment/Decrement value (`number`, `msg`, `flow`, `global`). Note: for decrement is enough with enter negative values and for increment positive values.

The loop will continue as long as the condition it is `TRUE`, throwing an output to the output label `continue` in each iteration.

When the condition changes to `FALSE` the loop will terminate an the output will be send to the output label `exit`

## Basic example

With an example can be more straightforward to understand how this node works, the flow is available in the example folder of this repo.

![iterate-loop resting](./images/node0.png)

node0.png - *node in resting mode*

![iterate-loop looping](./images/node1.png)

node1.png - *looping status*

![iterate-loop terminated](./images/node2.png)

node2.png - *terminated loop status*

![iterate-loop output](./images/node-output.png)

node-output.png - *output from debug messages*

![iterate-loop properties](./images/node-properties.png)

node-output.png - *configuration properties of the node*

## License

[Apache 2.0](./LICENSE).