json index of property value

Question

I need to get the index of the json object in an array whose by the objects id

here is the example code

var list = [ { _id: \'4dd822c5e8a6c42aa7000         


        

Answer 1

You can try Array.prototype.map, based on your example it will be:

var index = list.map(function(e) { return e._id; }).indexOf('4dd822c5e8a6c42aa70000ad');

Array.prototype.map is not available on IE7 or IE8. ES5 Compatibility