how would I go about accessing a deep value using a single variable in bracket notation?

Question

I am wondering how to do the following- I have the following data:

dta = {
       \"fielddata\": {
           \"text1\": \"4B030C2E-3D53-4DF8-A3535EF377B45DE5\",         


        

Answer 1

var val = "fielddata.text1",
    acc = dta,               // reference the base object
    parts = val.split('.'),  // split the val into an Array of individual parts
    i;

  // Iterate the parts, updating acc each time
for( i = 0; i < parts.length; i++ )
    acc = acc[parts[i]];

Answer 2

getter

exports.getDeep = function(field, object){
  var parts = field.split('.');
  var value = object;
  // Iterate the parts, updating value each time
  for( var i = 0; i < parts.length; i++ ){
      value = value[parts[i]];
      if(i==parts.length-1){
        return JSON.parse(JSON.stringify(value))
      }
  }
}

setter

exports.setDeep = function(field, object, newvalue){
  var parts = field.split('.');
  for( var i = 0; i < parts.length; i++ ){
      if(i==parts.length-1){
        object[parts[i]] = newvalue
        return object
      }
  }
}

Answer 3

Another option is JSONPath. For relatively simple usecases, doing it manually is likely a better solution, but with greater complexity, I might use something more formalized.

And while I hate to suggest it, there's always eval('dta.fielddata.text1')