CODEWITHSUNDEEP
javascript
Mandalina
Mandalina

Reputation: 446

Iterate through an array of objects, to find objects that contain 2 values

I currently have an array that looks like this: 

var array = [
      {
        "name": "a",
        "age": 1,
        "siblings": 3
      },
      {
        "name": "b",
        "age": 3,
        "siblings": 5
      },
      {
        "name": "a",
        "age": 1,
        "siblings": 2
      }
]

I want to create a function that takes 2 values, and returns a new array containing the objects that match those two values.

var name = "a";
var age = 1;
someFunction(name, age);

And returns something that looks like this:

newArray = [
      {
        "name": "a",
        "age": 1,
        "siblings": 3
      },
      {
        "name": "a",
        "age": 1,
        "siblings": 2
      }

]

I have tried using the filter method and the reduce methods but no success. If someone could help me or point me in the right direction, I would greatly appreciate that. 

var array = [
      {
        "name": "a",
        "age": 1,
        "siblings": 3
      },
      {
        "name": "b",
        "age": 3,
        "siblings": 5
      },
      {
        "name": "a",
        "age": 1,
        "siblings": 2
      }
]

 var result = array.filter(function(obj) {
           return obj.name === "a" && obj.age === 1;
           });
    return result[0];
 }
console.log(result);

Upvotes: 1

Views: 58

Answers (5)

Amardeep Bhowmick
Amardeep Bhowmick

Reputation: 16908

In the Array#filter callback, just compare the name & age of current element with those of the params you passed.

var array = [{"name":"a","age":1,"siblings":3},{"name":"b","age":3,"siblings":5},{"name":"a","age":1,"siblings":2}]
var name = "a";
var age = 1;
function someFunction(name, age){
 return array.filter((obj) => obj.name === name && obj.age === age)
}
console.log(someFunction(name, age));

You can also use Array#reduce. Just add the matching object in the accumulator array and return it.

var array = [{"name":"a","age":1,"siblings":3},{"name":"b","age":3,"siblings":5},{"name":"a","age":1,"siblings":2}]
var name = "a";
var age = 1;
function someFunction(name, age){
 return array.reduce((acc, obj) => {
   if(obj.name === name && obj.age === age) 
     acc.push(obj);
   return acc;
 }, []);
}
console.log(someFunction(name, age));

Upvotes: 1

elraphty
elraphty

Reputation: 630

Try this 

let array = [
  {
    "name": "a",
    "age": 1,
    "siblings": 3
  },
  {
    "name": "b",
    "age": 3,
    "siblings": 5
  },
  {
    "name": "a",
    "age": 1,
    "siblings": 2
  }
];

function someFunction(name, age) {
  let newArray = [];
  array.forEach(function(arr) {
    let nameMatch = false;
    let ageMatch = false;
    let obj = arr;
    for(key in obj) {
      if(obj.hasOwnProperty(key)) {
        if(key === 'name') {
          // console.log('name key i am', key);
          let nameValue = obj[key];
          if(nameValue === name) {
            nameMatch = true;
            // console.log('name match', nameValue, name);
          }
        } else if(key === 'age') {
          let ageValue = obj[key];
          if(ageValue === age) {
             // console.log('age match', ageValue, age);
             ageMatch = true
          }
        }
      } 
    }
    if(ageMatch &&  nameMatch) {
      // console.log('true');
      newArray.push(arr);
      // console.log(arr);
    }
  });

  return newArray;
}

let name = "a";
let age = 1;
let myArr = someFunction(name, age);
console.log('My Arr', myArr);

Upvotes: 0

ellipsis
ellipsis

Reputation: 12152

Use the filter function

var array = [
  {
    "name": "a",
    "age": 1,
    "siblings": 3
  },
  {
    "name": "b",
    "age": 3,
    "siblings": 5
  },
  {
    "name": "a",
    "age": 1,
    "siblings": 2
  }
]
var name = "a";
var age = 1;
someFunction(name, age);
function someFunction(name,age)
{
console.log(array.filter((e)=>e.name==name && e.age==age?true:false
))}

Upvotes: 0

Asim Khan
Asim Khan

Reputation: 2039

here is your working function

function someFunction (name, age) {
    return array.filter(val => val.name == name && val.age == age)
}

Upvotes: 1

Nina Scholz
Nina Scholz

Reputation: 386604

You could take an array with the wanted key/value pair for searching.

Take Array#filter with a check for the predicates with Array#every.

var array = [{ name: "a", age: 1, siblings: 3 }, { name: "b", age: 3, siblings: 5 }, { name: "a", age: 1, siblings: 2 }],
    search = [['name', 'a'], ['age', 1]],
    result = array.filter(object => search.every(([key, value]) => object[key] === value));

console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }

Upvotes: 1

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