Utility (Data): JSON AutoTypes - Snippet Editor - Jeremyb.me

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var getDataType = (v) => {
  var tags = [];
  //is anything there?
  var isTruthy = v ? true : false;
  //check the data type of root value
  var dataType = typeof v;
  var isNumber = (s) => !isNaN(+s);
  var isDate = (s) => !isNaN(Date.parse(s));
  var processString = (s) => {
    s = s.replace(/[$,%]/gim,"").trim();
    s == "true" || s == "false" ? tags.push("boolean") : //if true or false, tag bool
      isNumber(s) ? tags.push("number") : //else if is convertable to number, tag num
      isDate(s) ? tags.push("date") : //else if is convertable to date, tag date
    tags.push(`string_${s.length}`); //else tag string
  }
  switch(dataType){
    case "number":
      tags.push("number");
      break;
    case "boolean":
      console.log("BOOL",{v})
      tags.push("boolean")
      break;
    case "string":
      v.length ? processString(v) : tags.push("string_0")
      break;
    case "object":
      Array.isArray(v) ?
        v.length ? tags.push(v.map(d => getDataType(d))) : tags.push([]) :
        Object.values(v).length ? tags.push(Object.entries(v)
          .reduce((obj,d) => {
            obj[d[0]] = getDataType(d[1]);
            return obj;
          },{})) : tags.push({});
      break;
  }
  return tags.length == 1 ? tags[0] : tags;
}

var data = [[["a","b","c"],[1,2,3]]]

var report = getDataType(data);
var reportString = JSON.stringify(report,null,"|");
var depthReport = reportString.split("\n").map(s => s.match(/\|/gim,"") ? s.match(/\|/gim,"").length : 0);
console.log(JSON.stringify({report,depthReport},null,2))