Jq

‘Ternary Operator’ with JQ: Checking for Empty Values

As you noticed I use JQ commonly like RegExp. I recently used select(.!=null) to filter for non-null values. Turns out I missed something in docs:

jq -nc '{a:1},[1,23],true,null,42|values'

OUTPUT

{"a":1}
[1,23]
true
42

jq -nc '{a:1},[1,23],true,null,42|iterables'

OUTPUT

{"a":1}
[1,23]

jq -nc '{a:1},[1,23],true,null,42|nulls'

OUTPUT

null

Now that can be used to set defaults:

jq -nc '.notset?|values // "default"'

OUTPUT

"default"

$ jq -nc '.notset|values // "default"'

OUTPUT