# Tips on streamlining this function
**URL:** https://discourse.nodered.org/t/tips-on-streamlining-this-function/33092
**Category:** General
**Created:** [19 September 2020 18:44 UTC](https://discourse.nodered.org/t/tips-on-streamlining-this-function/33092 "2020-09-19T18:44:24Z")
**Posts on this page:** 3
**Page:** 2
### Author:  [@877](https://discourse.nodered.org/u/877)
#### Post date: [21 September 2020 09:17 UTC](https://discourse.nodered.org/t/tips-on-streamlining-this-function/33092/21 "2020-09-21T09:17:38Z")
> [@TotallyInformation](#):
>
> That is certainly a case of over-streamlining.
As they say, be careful what you wish for! 😄
Thanks for the help 👍
---
### Author:  [@janvda](https://discourse.nodered.org/u/janvda)
#### Post date: [21 September 2020 09:47 UTC](https://discourse.nodered.org/t/tips-on-streamlining-this-function/33092/22 "2020-09-21T09:47:44Z")
> [@877](#):
>
> I feel there is some way to cut it down in a clever way:
When you need to do some json mapping you can always consider using a jsonata expression in a change node.
```auto
[ [
/* Power */
{ "payload" : payload.power ? 1 : 0,
"pin" : 71 },
/* Filter */
{ "payload" : payload.filter ? 1 : 0,
"pin" : 74 },
/* Heat */
{ "payload" : ( payload.heat or payload.heater ) ? 1 : 0,
"pin" : 75 },
/* Celsius */
{ "payload" : payload.celsius ? 1 : 0,
"pin" : 76 },
/* Air */
{ "payload" : payload.air? 1 : 0,
"pin" : 77 },
/* Locked */
{ "payload" : payload.locked ? 1 : 0,
"pin" : 79 }
] ]
```
You can validate this using:
- [https://try.jsonata.org/IBisAjDVy](https://try.jsonata.org/IBisAjDVy)
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [20 November 2020 09:47 UTC](https://discourse.nodered.org/t/tips-on-streamlining-this-function/33092/23 "2020-11-20T09:47:59Z")
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