Print array of objects entire path

Question

Good Day People

I have an array of objects and I need to print out the path of each node value and last print key and value for special (by name) node.

This is the array of objects or JSON

[{
    "Name": "2007",
    "Elements": [{
            "Name": "country1",
            "Elements": [{
                "House": "house1",
                "water": 1.8
            }],
            "Data": {}
        },
        {
            "Name": "country2",
            "Elements": [{
                "Name": "city2",
                "Elements": [{
                    "Name": "neighbourhood2",
                    "Elements": [{
                        "House": "house2",
                        "water": 2.8
                    }]
                }],
                "Data": {}

            }],
            "Data": {}
        },
        {
            "Name": "country3",
            "Elements": [{
                "House": "house2",
                "uni bill": 3.8
            }],
            "Data": {}
        }
    ],
    "Data": {}
}]

The output should be like this

2007 > country1 > house > water: 1.8
2007 > city2 > neighbourhood2 > house2 > electricity: 2.8
2007 > country3 > house > uni bill: 3.8

++++++++++++++ edited +++++++++++++++

function objectToPaths(data) {
    var validId = /^[a-z_$][a-z0-9_$]*$/i;
    var result = [];
   doIt(data, "");
    return result;

    function doIt(data, s) {
      if (data && typeof data === "object") {
       if (Array.isArray(data)) {
          for (var i = 0; i < data.length; i++) {
            doIt(data[i], s + "");
          }
        } else {
          for (var p in data) {
            if (validId.test(p)) {

              doIt(data[p], s + " > " + data[p]);
             } else {
              doIt(data[p], s + "");
           }
          }
        }
      } else {
        result.push(s);
      }
   }
 }

this is a rewrite of a function I found here but I did not get the expected result

+++++++++++++++++++++++ end of the edit +++++++++++++++++++++++

Please help

Thanks in advance

This looks like you're trying to get somebody to do your work for you, which is generally not what this community is for. Sharing your previous attempts might help us debug them though. — tomcek112
– tomcek112, Commented Oct 23, 2017 at 16:33
I have edited the question, I have post the function I used. — rebh. a.m
– rebh. a.m, Commented Oct 23, 2017 at 16:39

shawon191 · Accepted Answer · 2017-10-23 17:17:44Z

4

What you are looking for is a Depth First Traversal function that recursively print properties:

function print(arr, path) {                              // print takes an array an an accumulated path from which it will start printing
  arr.forEach(function(obj) {                            // for each object obj in the array
    if(obj.Elements) {                                   // if the object obj has sub elements in it
      print(obj.Elements, path + " > " + obj.Name);      // then call print on those elements, providin the absolute path to this object
    } else {                                             // otherwise (it is a leaf)
      const bills = Object.keys(obj)
        .filter(key => key !== "House")
        .map(key => `${key}: ${obj[key]}`)
        .join(', ')
      console.log(path.slice(3) + " > " + obj.House + " > " + bills);    // print the accumulated path along with the House property of this object (removing the first 3 letters from path which are equal to " > ")
    }
  });
};

var arr = [{"Name":"2007","Elements":[{"Name":"country1","Elements":[{"House":"house1","water":1.8}],"Data":{}},{"Name":"country2","Elements":[{"Name":"city2","Elements":[{"Name":"neighbourhood2","Elements":[{"House":"house2","water":2.8}]}],"Data":{}}],"Data":{}},{"Name":"country3","Elements":[{"House":"house2","uni bill":3.8}],"Data":{}}],"Data":{}}];

print(arr, "");

edited Oct 23, 2017 at 17:17

shawon191

1,96516 silver badges28 bronze badges

answered Oct 23, 2017 at 17:01

ibrahim mahrir

31.8k5 gold badges50 silver badges78 bronze badges

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3 Comments

Nina Scholz Over a year ago

the art of traveling is irrelevant, because you need the last point/leaf.

RJ- Over a year ago

may i know what si the result fot .map(key => ${key}: ${obj[key]}) ??? is it ES 6 ??

ibrahim mahrir Over a year ago

@RJ That part of the code wasn't added by me (check out the revision). It just add the bills to the end of the paths.

Nina Scholz · Accepted Answer · 2017-10-23 17:21:31Z

You could take a function for iterating and collect the path to the last object.

function iter(array, path) {
    path = path || [];
    array.forEach(function (o) {
        if (o.Elements) {
            return iter(o.Elements, path.concat(o.Name));
        }
        Object.keys(o).forEach(function (k) {
            if (k !== 'House') {
                console.log(path.concat(o.House, k).join(' > ') + ': ' + o[k]);
            }
        });            
    });
}

var data = [{ Name: "2007", Elements: [{ Name: "country1", Elements: [{ House: "house1", water: 1.8 }], Data: {} }, { Name: "country2", Elements: [{ Name: "city2", Elements: [{ Name: "neighbourhood2", Elements: [{ House: "house2", water: 2.8 }] }], Data: {} }], Data: {} }, { Name: "country3", Elements: [{ House: "house2", "uni bill": 3.8 }], Data: {} }], Data: {} }];

iter(data);

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