suspicion arises that the argument is not correctly referencing the appropriate variables

I am trying to grasp the situation happening here. I have two variables activeToInactive and inactiveToActive which I increase whenever a status is updated. Here's my code snippet:

Counter Service:

export class CounterService {
    // Initial States
    activeToInactive = 0
    inactiveToActive = 0
    
    incrementStatusCount(statusCount: number) {
        // Incrementing either of the initial states each time the function is called.
        statusCount++
        if (statusCount == this.activeToInactive) {
            console.log(`${statusCount} - changing from active to inactive`)
        }
        if (statusCount == this.inactiveToActive) {
            console.log(`${statusCount} - changing from inactive to active`)
        }
        // I'm observing that statusCount doesn't match the initial states, causing the if statements to evaluate as false
        
    }
}

Transfer Service:

import { Injectable } from "@angular/core";
import { CounterService } from "./counter.service";

@Injectable()
export class transferService {

    constructor(private Counter: CounterService) {}
    activeUsers = ['Max', 'Anna'];
    inactiveUsers = ['Chris', 'Manu']  
    
    setToInactive(id: number) {
        this.inactiveUsers.push(this.activeUsers[id]);
        this.activeUsers.splice(id, 1);


        // Invoking the function from a different service
        this.Counter.incrementStatusCount(this.Counter.activeToInactive)
    }
      
    setToActive(id: number) {
        this.activeUsers.push(this.inactiveUsers[id]);
        this.inactiveUsers.splice(id, 1);

        // Invoking the function from a different service
        this.Counter.incrementStatusCount(this.Counter.inactiveToActive)
    }  
}

Whenever either function in Transfer Service is triggered, the initial states are not being incremented. It seems that statusCount does NOT match any of the initial states. Could this be related to references? I haven't fully grasped them yet, so if you have any suggestions on how to approach this issue, please share.

Appreciate your help in advance!!!

Answer №1

You are almost there.

Within the incrementStatusCount method, you have a parameter called statusCount that is meant to be used for incrementing either activeToInactive or inactiveToActive based on the input value.

However, in the TransferService, when invoking

this.Counter.incrementStatusCount(this.Counter.activeToInactive)
and
this.Counter.incrementStatusCount(this.Counter.inactiveToActive)
, you are actually passing the initial values of activeToInactive and inactiveToActive instead of the counts you intend to increment. It would be best to directly use inactiveToActive and activeToInactive.

Please update your CounterService as follows:

incrementStatusCount(incrementActiveToInactive: boolean) {
    // Increment the appropriate state based on the provided flag.
    if (incrementActiveToInactive) {
        this.activeToInactive++;
        console.log(`${this.activeToInactive} - active to inactive`);
    } else {
        this.inactiveToActive++;
        console.log(`${this.inactiveToActive} - inactive to active`);
    }
}

Your TransferService will see slight modifications, like so:

setToInactive(id: number) {
        this.inactiveUsers.push(this.activeUsers[id]);
        this.activeUsers.splice(id, 1);

        // Invoke the function with the correct flag
        this.Counter.incrementStatusCount(true);
    }

    setToActive(id: number) {
        this.activeUsers.push(this.inactiveUsers[id]);
        this.inactiveUsers.splice(id, 1);

        // Invoke the function with the correct flag
        this.Counter.incrementStatusCount(false);
    }

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