CODEWITHSUNDEEP
javascriptjavascript-objects
bonekuukkeli
bonekuukkeli

Reputation: 9

How do I call function with changing name properly in Javascript?

So, this is my current problem:

I have locations.js file that has several functions inside with different town/area names and they all include few switches. This is example:

let Locations = {

town1: function (eventType) {

    switch (eventType) {
        case "load":
            // Stuff related to main starting point of this location 
            break;

    }}

They have been all nice for everything else, but now I'm trying to create a "main access" when starting the program. Let's call main file as manager.js

    let Manager = {

    setStart: function () {

       currentLocation = user.currentLoc;

       // Call load function based on current location to start program from right spot
       Locations.currentLocation("load");

}

Result:

TypeError: Locations is not a function

As you see, I want to call function with user.currentLoc information (town names), which are saved to database. But it seems like I cant add it to variable and just use it. What am I missing here? Do I type it wrong when calling a function? I'm quite sure that there's some easy solution to this, but even after several hours I still fail to do this right.

Upvotes: 1

Views: 184

Answers (3)

bonekuukkeli
bonekuukkeli

Reputation: 9

let manager = {
setStart: () => {
    const currentLocation = user.currentLoc;

    // Access the Locations property
    const fn = Locations[currentLocation];
    // Invoke the function
    fn(`load`);
}

};

This did it! Thanks VRoxa. I had no idea that Javascript works like this.

Upvotes: 0

VRoxa
VRoxa

Reputation: 1051

You are trying to access to a property field of the Locations object. This field is a function, however, if you are trying to call this function by the name of a variable, the Javascript interpreter will take it as a direct call of the function.

let manager = {
    setStart: () => {
        const currentLocation = user.currentLoc;

        // Access the Locations property
        const fn = Locations[currentLocation];
        // Invoke the function
        fn(`load`);
    }
};

Hope it helps.

Upvotes: 1

josh.trow
josh.trow

Reputation: 4901

Perhaps Locations[currentLocation]('load') is what you mean to call, but all the same - it looks like Locations isn't in scope in your Manager file, you need to import it somehow. That could be a missing require or import depending on your project

Upvotes: 0

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