How to filter nested lists of objects 5 levels

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How to filter nested lists of objects 5 levels

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#1 by (0 votes)

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I'm investigating how to filter lists of nested objects. But I'm not capable .... The object that I try to filter is:

var objList = [
  {
    "name": "Object0Name",
    "id": "Object0ID",
    "Object1List": [
      {
        "id": "Object1id_A1",
        "name": "Object1Name_A1",
        "Object2List": [
          {
            "id": 187,
            "name": "Object2Name_A1",
            "Object3List": [
              {
                "id": "mammal",
                "name": "mammal",
                "Object4List": [
                  {
                    "id_client": "rabbit",                   
                    "Currency": "EUR"  
                  },
                  {
                    "id_client": "cat",                    
                    "Currency": "EUR",
                  },
                  {
                    "id_client": "tiger",
                    "Currency": "EUR",                    
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "Object1id_B1",
        "name": "Object1Name_B1",
        "Object2List": [
          {
            "id": 189,
            "name": "Object2Name_B1",
            "Object3List": [
              {
                "id": "fish",
                "name": "fish",
                "Object4List": [
                  {
                    "id_client": "tiger shark",                   
                    "Currency": "EUR",
                    
                  },
                  {
                    "id_client": "tuna",
                    "currency": "GBP",                   
                  },
                  
                ]
              }
            ]
          }
        ]
      }
    ]
  }
]

var response= objList.filter(function(Object0List){
			return Object0List.Object1List.filter(function(Object1List){
				return	 Object1List.Object2List.filter(function(Object2List){
					return	 Object2List.Object3List.filter(function(Object3List){
						return	 Object3List.Object4List.filter(function(Object4List){
							return Object4List.id_client.includes("tiger");

						});
					});
				});
			});
		});



var myJSON = JSON.stringify(response);
console.log('The animal is:');
console.log(myJSON);

I'm receiving all the objects, so the filter is not working. The output that I would like to obtain is all the clients that contain the word tiger:

var objList = [
      {
        "name": "Object0Name",
        "id": "Object0ID",
        "Object1List": [
          {
            "id": "Object1id_A1",
            "name": "Object1Name_A1",
            "Object2List": [
              {
                "id": 187,
                "name": "Object2Name_A1",
                "Object3List": [
                  {
                    "id": "mammal",
                    "name": "mammal",
                    "Object4List": [                     
                      {
                        "id_client": "tiger",
                        "Currency": "EUR",                    
                      }
                    ]
                  }
                ]
              }
            ]
          },
          {
            "id": "Object1id_B1",
            "name": "Object1Name_B1",
            "Object2List": [
              {
                "id": 189,
                "name": "Object2Name_B1",
                "Object3List": [
                  {
                    "id": "fish",
                    "name": "fish",
                    "Object4List": [
                      {
                        "id_client": "tiger shark",                   
                        "Currency": "EUR",
                        
                      }                      
                    ]
                  }
                ]
              }
            ]
          }
        ]
      }
    ]

I'm sure I'm using the filter incorrectly, could someone propose filtering that works with filter or lambda expressions? (without using recursion please)

Thank you very much.

javascript lambda

asked by shaky 19.03.2018 в 22:07

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1 answer

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score 0 · Accepted Answer

To do the filtering you should use the function forEach () to iterate in the list of objects but in your case to already know the name of the lists I simply access them, however I suggest that if you can change the model of your list even more generic name it would be easier to iterate in them and It would also be better for a good maintenance in the future.

var objList = [{
  "name": "Object0Name",
  "id": "Object0ID",
  "Object1List": [{
      "id": "Object1id_A1",
      "name": "Object1Name_A1",
      "Object2List": [{
        "id": 187,
        "name": "Object2Name_A1",
        "Object3List": [{
          "id": "mammal",
          "name": "mammal",
          "Object4List": [{
            "id_client": "tiger",
            "Currency": "EUR",
          }]
        }]
      }]
    },
    {
      "id": "Object1id_B1",
      "name": "Object1Name_B1",
      "Object2List": [{
        "id": 189,
        "name": "Object2Name_B1",
        "Object3List": [{
          "id": "fish",
          "name": "fish",
          "Object4List": [{
            "id_client": "tiger shark",
            "Currency": "EUR",

          }]
        }]
      }]
    }
  ]
}]

objList.forEach(function(object, indice, array) {

  object.Object1List.forEach(function(object, indice, array) {
  
    object.Object2List.forEach(function(object, indice, array) {

      object.Object3List.forEach(function(object, indice, array) {

        object.Object4List.forEach(function(object, indice, array) {
        
          if (object.id_client == "tiger")
            alert("Se encontro coincidencia")
            
        });
      });

    });

  });

});