/test.mp3:
# display
> fq -d mp3 '.headers[0].padding | ., type, length?' /test.mp3
    |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|                |
0x20|         00 00 00 00 00 00 00 00 00 00         |   ..........   |.headers[0].padding: Correct (none) (zero padding)
"null"
0
# index
> fq -d mp3 '.headers[0].padding[0] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
> fq -d mp3 '.headers[0].padding[-1000] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
> fq -d mp3 '.headers[0].padding[1000] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
# slice
> fq -d mp3 '.headers[0].padding[1:3] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
> fq -d mp3 '.headers[0].padding[0:-1] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
> fq -d mp3 '.headers[0].padding[-1000:2000] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an array but got: null
# key
> fq -d mp3 '.headers[0].padding["test"] | ., type, length?' /test.mp3
exitcode: 5
stderr:
error: expected an object but got: null
# each
> fq -d mp3 '[.headers[0].padding[]] | type, length?' /test.mp3
exitcode: 5
stderr:
error: cannot iterate over: null
# keys
> fq -d mp3 '.headers[0].padding | keys' /test.mp3
exitcode: 5
stderr:
error: keys cannot be applied to: null
# has
> fq -d mp3 '.headers[0].padding | has("a")' /test.mp3
exitcode: 5
stderr:
error: has cannot be applied to: null
> fq -d mp3 '.headers[0].padding | has(0)' /test.mp3
exitcode: 5
stderr:
error: has cannot be applied to: null
# type
> fq -d mp3 '.headers[0].padding | type' /test.mp3
"null"
# tonumber
> fq -d mp3 '.headers[0].padding | tonumber' /test.mp3
exitcode: 5
stderr:
error: tonumber cannot be applied to: null
# tostring
> fq -d mp3 '.headers[0].padding | tostring' /test.mp3
"null"
# to gojq
> fq -d mp3 '.headers[0].padding + ""' /test.mp3
""
> fq -d mp3 '.headers[0].padding + 1' /test.mp3
1
# test _keys
> fq -d mp3 '.headers[0].padding._start | ., type, length?' /test.mp3
280
"number"
280
> fq -d mp3 '.headers[0].padding._stop | ., type, length?' /test.mp3
360
"number"
360
> fq -d mp3 '.headers[0].padding._len | ., type, length?' /test.mp3
80
"number"
80
> fq -d mp3 '.headers[0].padding._name | ., type, length?' /test.mp3
"padding"
"string"
7
> fq -d mp3 '.headers[0].padding._value | ., type, length?' /test.mp3
null
"null"
0
> fq -d mp3 '.headers[0].padding._symbol | ., type, length?' /test.mp3
"Correct"
"string"
7
> fq -d mp3 '.headers[0].padding._description | ., type, length?' /test.mp3
"zero padding"
"string"
12
> fq -d mp3 '.headers[0].padding._path | ., type, length?' /test.mp3
[
  "headers",
  0,
  "padding"
]
"array"
3
> fq -d mp3 '.headers[0].padding._bits | ., type, length?' /test.mp3
   |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|                |
0x0|00 00 00 00 00 00 00 00 00 00                  |..........      |
<80 bits>
"buffer"
80
> fq -d mp3 '.headers[0].padding._bytes | ., type, length?' /test.mp3
   |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|                |
0x0|00 00 00 00 00 00 00 00 00 00                  |..........      |
<10 bytes>
"buffer"
10
> fq -d mp3 '.headers[0].padding._error | ., type, length?' /test.mp3
null
"null"
0
> fq -d mp3 '.headers[0].padding._unknown | ., type, length?' /test.mp3
false
"boolean"