Check whether a value exists in JSON object

Question

I have the next JSON:

var JSONObject = {"animals": [{name:"cat"}, {name:"dog"}]}; 

What is the best way to know if the "dog" value exists in the JSON object?

Thanks.

Solution 1

var JSONObject = {"animals": [{name:"cat"}, {name:"dog"}]}; ... for (i=0; i < JSONObject.animals.length; i++) {     if (JSONObject.animals[i].name == "dog")         return true; } return false; 

Solution 2 (JQuery)

var JSONObject = {"animals": [{name:"cat"}, {name:"dog"}]}; ... $.map(JSONObject.animals, function(elem, index) {  if (elem.name == "dog")       return true; }); return false; 

Solution 3 (using some() method)

function _isContains(json, value) {     let contains = false;     Object.keys(json).some(key => {         contains = typeof json[key] === 'object' ?          _isContains(json[key], value) : json[key] === value;         return contains;     });     return contains; } 

Answer 1

var JSON = [{"name":"cat"}, {"name":"dog"}]; 

The JSON variable refers to an array of object with one property called "name". I don't know of the best way but this is what I do?

var hasMatch =false;  for (var index = 0; index < JSON.length; ++index) {   var animal = JSON[index];   if(animal.Name == "dog"){    hasMatch = true;    break;  } }