尝试访问数组中的对象时，grep返回未定义

Question

I have an array have built up with a series of objects in it, but when i am trying to use grep to bring back just one object based on a condition, it is always returning undefined

Array is like

[Object { Id=61, Name=”A Name”, Department=”A Department”, Tag=”A Tag”}, Object {Id=62....

Now the id i am passing in, is not the index, it is the actual Id of the object..ie: 61

var resultOut = $.grep(myArray, function (e) {
        return e.Id === id;
    });

console.log(resultOut[0]);

Now it has been mentioned that it may be because it is changing the id i am passing in as a string, so the e.Id === id does not match, ut i have no way of checking this

Answer 1

If it's id being a string, two ways to fix it. Use == :

return e.Id == id;

Or convert id to int:

return e.Id === +id;
//              ^

The + before id is equivalent to a parseInt() .