foreach return object property javascript

Question

In the following code, can somebody explain why object property is returned using a for loop but not using a forEach. Is it something related to returning object references or is it something specific to forEach loop on an array ?

var empModule = (function(){
    var empArray = [{
        "name":"Aish",
        "age":"27",
        "location": "All"
    },{
        "name":"Anu",
        "age":"26",
        "location": "Muz"
    },{
        "name":"Vern",
        "age":"25",
        "location": "Mang"
    }];

    var searchAge = function(name){  
        for(var i=0;i<empArray.length;i++) {
            if(empArray[i].name === name) {
                return empArray[i].age;
            }
        };
    };

    var searchLocation = function(name){
        empArray.forEach(function(obj){
            if(name === obj.name) {
                return obj.location;
            }
        });
    };

    return {
        findAge: searchAge,
        findLocation: searchLocation
    };

})();
var secAge = empModule.findAge("Anu");
console.log(secAge); // Correct Output
var thirdLoc = empModule.findLocation("Vern");
console.log(thirdLoc); // Returns undefined

Answer 1

return returns to the function it's in. In the for.. example, that's searchAge. When you use forEach(), you pass it a callback function, and so you return the value to that callback. You never return anything in searchLocation.

You should just use the regular for.. loop both times here.

Answer 2

in java script there is no break method for forEach.

if you use

return obj.location

it has no effect on it

but when you use return method in for loop then that will break and return the value.

There is some and every which has a break method.

Some break on return true and every break on return false;

try like this

var location = "";
empArray.some(function (obj) {
    if (name === obj.name) {
        location = obj.location;
        return true;
    }
});
return location;

Or try like this

var location = "";
empArray.every(function (obj) {
    if (name === obj.name) {
        location = obj.location;
        return false;
    }
});.
return location;