I want to use jq to put a stream of json objects into a json array, for example, from
{"a":1}
{"b":2}
to
[{"a":1},
{"b":2}]
But this would not work
echo '
{"a":1}
{"b":2}
'|jq '[.]'
since I got
[
{
"a": 1
}
]
[
{
"b": 2
}
]
Slurp it up with the -s option.
$ jq -s '.' <<< '{ "a": 1 } { "b": 2 }'
[
{
"a": 1
},
{
"b": 2
}
]
As another option, reading the values using inputs is a much more flexible alternative. You'll usually want to use this in conjunction with the -n option to prevent the first value from being consumed prematurely.
$ jq -n '[inputs]' <<< '{ "a": 1 } { "b": 2 }'
[{"a":1}] and [{"b":2}] and the result should be without the inner arrays, ie. [{"a":1},{"b":2}]. Any tipp? It seems some concepts of jq are still eluding me.
flatten the slurped inputs jq -s 'flatten'. Or better, iterate over each the inputs jq -n '[inputs[]]'flatten was the hint I needed. But I first had to understand the concept, that jq no just reads one JSON entity but accepts a "stream" of them. With that I understood -s and with that I understood flatten. :-)
jq and want to turn it into an array?