您仍然可以将modify-overwrite-beta转换与toInteger转换沿着使用，例如

[
  //Determine the elements whether toInteger conversion is applicable for them
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "arr": "=(@(1,firstString))",
      "0": "=toInteger(@(1,arr[0]))",
      "1": "=toInteger(@(1,arr[1]))",
      "2": "=toInteger(@(1,arr[2]))"
    }
  },
  //The arrays are generated from the elements which are eligible to
  //conversion, while not for the others
  {
    "operation": "shift",
    "spec": {
      "*": "&",
      "arr": { "*": "&" }
    }
  },
  //The arrays are removed, so all numeric ones by reversing
  //key-value pairs
  {
    "operation": "shift",
    "spec": {
      "*": {
        "$": "@(0)"
      }
    }
  },
  //Reverse back the pairs
  {
    "operation": "shift",
    "spec": {
      "*": {
        "$": "readingS[#2]"
      }
    }
  },
  //and pick the leftmost element
  {
    "operation": "cardinality",
    "spec": {
      "*": "ONE"
    }
  }
]

你有一些以数字结尾的值，所以我们可以匹配所有以数字结尾的值，最后我们有一个真实的串。

[
  {
    "operation": "shift",
    "spec": {
      "firstString": {
        "*": {
          "*0": "",
          "*1": "",
          "*2": "",
          "*3": "",
          "*4": "",
          "*5": "",
          "*6": "",
          "*7": "",
          "*8": "",
          "*9": "",
          "*": {
            "$": "readingS"
          }
        }
      }
    }
  }, {
    "operation": "shift",
    "spec": {
      "*": {
        "*": "&"
      }
    }
  }
]