I'm struggling to comprehend the purpose of this function. [From the Codecademy Contact List exercise]

Within the "for var x in friends" loop, the program aims to search each key within the friends object, such as bill and steve. Subsequently, with the condition "friends[x].firstName === name", the check is made if the first name matches the provided input "name". However, there seems to be confusion on how the program determines whether "name" is referring to Steve or Bill.


        var friends = {
            bill: {
                firstName: "Bill",
                lastName: "Gates",
                number: " ",
                address: [' ', ' ', ' ',' ']
            },
            steve: {
                firstName: "Steve",
                lastName: "Jobs",
                number: " ",
                address: [' ', ' ', ' ',' ']
            }
        };
        
        var list = function(friends) {
            for (var x in friends) {
                console.log(x);
            }
        };

        var search = function(name) {
            for (var x in friends) {
                if(friends[x].firstName === name) {
                    console.log(friends[x]);
                    return friends[x];
                }
            }
        };
    

Answer №1

for (var x in friends)

This loop goes through each key in the friends object, resulting in two iterations with

x = "bill"
x = "steve"

Next, by accessing friends[x] in the loop, you are able to retrieve friends.bill and friends.steve. The name parameter is passed to search(name) function. This effectively searches for all entries in the dictionary friends where the firstName matches the given name.

Answer №2

In this scenario, we have created a function called search that takes an argument called name.

var search = function(name)

To use the function, you would call it like this:

search('Bill')

This function is designed to find a specific name, such as Bill, within a list of names by comparing each one with the input. Once a match is found, it will return the corresponding result.

An advantage of using a function with parameters is the ability to search for any name without changing the function itself. For example: search('Steve'), search('Bill').


If you're struggling to understand functions with parameters, consider revisiting the Codecademy section on understanding parameters - JavaScript.

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