jq遍历map

假设json定义如下：

{
  "name": "To",
  "mapfld": {
    "AA": "aa",
    "BB": "bb"
  }
}

输出key

$ cat t.json | jq -r '.mapfld | keys[]'
AA
BB

格式化key

$ cat t.json | jq -r '.mapfld | keys[] as $k | "\($k)"'
AA
BB
$ cat t.json | jq -r '.mapfld | keys[] as $k | "aa\($k)bb"'
aaAAbb
aaBBbb

输出value

$ cat t.json | jq -r '.mapfld | keys[] as $k | "\(.[$k])"'
aa
bb

格式化value

$ cat t.json | jq -r '.mapfld | keys[] as $k | "--\(.[$k])--"'
--aa--
--bb--

输出key和value

$ cat t.json | jq -r '.mapfld | keys[] as $k | "\($k)=\(.[$k])"'
AA=aa
BB=bb