Verify whether a specific "value" key is present in an object using JavaScript

Question

Verify whether a specific "value" key is present in an object using JavaScript

{ foo: [ foo1: true ],
  bar: [ bar1: true, bar2: true ],
  foobar: [ foobar1: true ] }

Within this object containing values in array-like objects, I am seeking to identify if a key exists with the value of [ bar1: true, bar2: true ]. If such a key is found associated with the specified value, its name should be returned.

To clarify, my objective is to search for the key linked to a particular value within the given object structure.

javascript json object key key-value

Answer 1

Answer №1

Initially, this is the correct syntax:

var map = {
  foo: { foo1: true },
  bar: { bar1: true, bar2: true },
  foobar: { foobar1: true }
};

To retrieve a specific key, you can utilize this function:

function searchKey(map, term) {
  var discovered = [];
  for(var property in map) {
    if(map.hasOwnProperty(property)) {
      for(var key in map[property]) {
        if(map[property].hasOwnProperty(key) && key === term) {
          discovered.push(property);
        }
      }
    }
  }
  return discovered;
}

For instance:

var searchResults = searchKey(map, 'bar1');
console.log(searchResults); 
// [ 'bar' ]

Answer 2

Initially, this is the correct syntax:

var map = {
  foo: { foo1: true },
  bar: { bar1: true, bar2: true },
  foobar: { foobar1: true }
};

To retrieve a specific key, you can utilize this function:

function searchKey(map, term) {
  var discovered = [];
  for(var property in map) {
    if(map.hasOwnProperty(property)) {
      for(var key in map[property]) {
        if(map[property].hasOwnProperty(key) && key === term) {
          discovered.push(property);
        }
      }
    }
  }
  return discovered;
}

For instance:

var searchResults = searchKey(map, 'bar1');
console.log(searchResults); 
// [ 'bar' ]

Answer 3

Answer №2

You have the ability to transform an array-like-object into a regular array using Array.prototype.slice.call()

function searchKey(object, key) {
    for (var property in object) {
        var arrayLikeObject = object[property];
        var newArray = Array.prototype.slice.call(arrayLikeObject);
        if (newArray.indexOf(key) != -1) {
            return property;
        }
    }
}

Answer 4

You have the ability to transform an array-like-object into a regular array using Array.prototype.slice.call()

function searchKey(object, key) {
    for (var property in object) {
        var arrayLikeObject = object[property];
        var newArray = Array.prototype.slice.call(arrayLikeObject);
        if (newArray.indexOf(key) != -1) {
            return property;
        }
    }
}

Verify whether a specific "value" key is present in an object using JavaScript

Answer №1

Answer №2

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