Determine whether any element in the array matches a property of the object

Question

Determine whether any element in the array matches a property of the object

Let's start with an array:

 arr=[
      "EMPRESA",
      "CD_DIRECAO",
      "DT_INI_DIRECAO"
    ]

Next, we have an object:

primary = {
           "EMPRESA": {"type": "varchar"},
           "CD_DIRECAO": {"type": "varchar"},
           "DT_INI_DIRECAO": {"type": "date"},
           "CD_DEPT": {"type": "varchar"},
           "DT_INI_DEPT": {"type": "date"},
           "ANO": {"type": "number"},
           "MES": {"type": "number"},
           "TP_CUSTO": {"type": "varchar"},
          }

The task at hand is to determine if any of the elements in arr can be found within the primary object. Any guidance on this would be greatly appreciated.

javascript arrays object lodash

Answer 1

Answer №1

To determine if a key exists, you can use the Array#some method to iterate through the array.

var arr = ["EMPRESA", "CD_DIRECAO", "DT_INI_DIRECAO"],
    primary = { EMPRESA: { type: "varchar"}, CD_DIRECAO: { type: "varchar"}, DT_INI_DIRECAO: { type: "date"}, CD_DEPT: { type : "varchar"}, DT_INI_DEPT: { type: "date"}, ANO: { type: "number"},  MES: { type: "number"}, TP_CUSTO: { type: "varchar"}},
    contain = arr.some(function (k) {
        return k in primary;
    });

console.log(contain);

Answer 2

To determine if a key exists, you can use the Array#some method to iterate through the array.

var arr = ["EMPRESA", "CD_DIRECAO", "DT_INI_DIRECAO"],
    primary = { EMPRESA: { type: "varchar"}, CD_DIRECAO: { type: "varchar"}, DT_INI_DIRECAO: { type: "date"}, CD_DEPT: { type : "varchar"}, DT_INI_DEPT: { type: "date"}, ANO: { type: "number"},  MES: { type: "number"}, TP_CUSTO: { type: "varchar"}},
    contain = arr.some(function (k) {
        return k in primary;
    });

console.log(contain);

Answer 3

Answer №2

for (let index = 0; index < array.length; index++){
    if (primary[array[index]]){
        //element found
    }
}

Answer 4

for (let index = 0; index < array.length; index++){
    if (primary[array[index]]){
        //element found
    }
}

Answer 5

Answer №3

To determine if a key exists in an object, you can iterate through the keys and use the indexOf method:

for (var key in myObject) {
    if (myArray.indexOf(key) !== -1) {
        console.log("Key exists");
    }
}

Alternatively, you can use Object.keys:

Object.keys(myObject).forEach(function(key) {
    if (myArray.indexOf(key) !== -1) {
        console.log("Key exists");
    }
});

Answer 6

To determine if a key exists in an object, you can iterate through the keys and use the indexOf method:

for (var key in myObject) {
    if (myArray.indexOf(key) !== -1) {
        console.log("Key exists");
    }
}

Alternatively, you can use Object.keys:

Object.keys(myObject).forEach(function(key) {
    if (myArray.indexOf(key) !== -1) {
        console.log("Key exists");
    }
});

Answer 7

Answer №4

Here is an example utilizing Array.prototype.some:

var elements=["EMPRESA","CD_DIRECAO","DT_INI_DIRECAO"];
var primary={EMPRESA:{type:"varchar"},CD_DIRECAO:{type:"varchar"},DT_INI_DIRECAO:{type:"date"},CD_DEPT:{type:"varchar"},DT_INI_DEPT:{type:"date"},ANO:{type:"number"},MES:{type:"number"},TP_CUSTO:{type:"varchar"}};

var result = elements.some(function(item){
   return primary[item];
});

console.log(result);

Answer 8

Here is an example utilizing Array.prototype.some:

var elements=["EMPRESA","CD_DIRECAO","DT_INI_DIRECAO"];
var primary={EMPRESA:{type:"varchar"},CD_DIRECAO:{type:"varchar"},DT_INI_DIRECAO:{type:"date"},CD_DEPT:{type:"varchar"},DT_INI_DEPT:{type:"date"},ANO:{type:"number"},MES:{type:"number"},TP_CUSTO:{type:"varchar"}};

var result = elements.some(function(item){
   return primary[item];
});

console.log(result);

Determine whether any element in the array matches a property of the object

Answer №1

Answer №2

Answer №3

Answer №4

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