Check for JSON value in JavaScript array

Question

I have an array of JSON objects, for example:

var myArray = [ {name:'foo',number:2}, {name:'bar',number:9}, {etc.} ] 

How to determine if myArray contains an object with name = "foo"?

Answer 1

If I am missing something, you should use them, at least for readability, and not for the map. And for performance, you have to break every time you find what you are looking for, there is no reason to continue the cycle:

 var hasFoo = false; $.each(myArray, function(i,obj) { if (obj.name === 'foo') { hasFoo = true; return false;} }); 

Answer 2

 for(var i = 0; i < myArray.length; i++) { if (myArray[i].name == 'foo') alert('success!') } 

Answer 3

Wherein:

 $.each(myArray, function(i, obj){ if(obj.name =='foo') alert("Index "+i + " has foo"); }); 

Greetings

Answer 4

 var hasFoo = false; $.map(myArray, function(v) { if (v.name === 'foo') { hasFoo = true; } });