How to prevent keys without values when creating key-value pairs

[FoolMuun]

When creating key-value pairs, how do you avoid ending up with keys that don't have values when the "value" is missing or evaluates to null or { } or [ ]?

JSLT:

{
	"AssetProperties": [
		{"key": "manufacturer", "value" : .mfr},
		{"key": "ratedVoltage", "value" : .kV},
		{"key": "ratedCurrent", "value" : .amps}
	]
}

If .amps, for example, happens to be missing from the input JSON, the above evaluates to:

{
	"AssetProperties": [
		{"key": "manufacturer", "value" :  "PCORE Electric Co."},
		{"key": "ratedVoltage", "value" : 2500},
		{"key": "ratedCurrent"}
	]
}

I'm hoping to get:

{
	"AssetProperties": [
		{"key": "manufacturer", "value" :  "PCORE Electric Co."},
		{"key": "ratedVoltage", "value" : 2500}
	]
}

[larsga]

In this case I think I would first make the array, and then filter it later. Like this:

let props = [
	{"key": "manufacturer", "value" : .mfr},
	{"key": "ratedVoltage", "value" : .kV},
	{"key": "ratedCurrent", "value" : .amps}
]

{
	"AssetProperties": [for ($props) . if (.value)]
}

[FoolMuun]

Perfect! That does it. Thanks.

Every time I think I found something JSLT can't do, I'm wrong... :)

[larsga]

It is Turing-complete, you know. :)