I have a json file like this

[
  "public-policy-routing/0",
  "public-policy-routing/1",
  "public-policy-routing/5",
  "public-policy-routing/7",
  "public-policy-routing/10"
]

since the element has pattern "key/values" where only values part differ I want to reduce the output to something like this

{ "public-policy-routing" : [0,1,5,7,10] }

any idea how to achieve above using jq ?

CodePudding user response：

One way would be using reduce on the array elements. Split at the slash, destructure the resulting array into a key and value variable, then add the value as an array to the field with the key name:

jq 'reduce (.[]/"/") as [$k,$v] ({}; .[$k]  = [$v])'

{
  "public-policy-routing": [
    "0",
    "1",
    "5",
    "7",
    "10"
  ]
}

Demo

If you wanted numbers instead of strings, convert the values using tonumber:

jq 'reduce (.[]/"/") as [$k,$v] ({}; .[$k]  = [$v | tonumber])'

{
  "public-policy-routing": [
    0,
    1,
    5,
    7,
    10
  ]
}

Demo

CodePudding user response：

Here is a mildly robust solution:

 def ton: try tonumber catch .;
 def keysplit: index("/") as $i
   | if $i then [.[:$i],  (.[$i 1:]|ton) ] else [., ""]  end;

 reduce ( .[]|keysplit ) as [$k,$v] ({}; .[$k]  = [$v] )