@Coderslang_Master: My mind is numb right now after trying to find problem with my code which is okay and rather great in fact. That says that I need help right now. So here is the code:

functions.js

export const updateProducerList = (term, state) => {
    for (let i = 0; i < state.producers.length; i++) {
        if (state.producers[i].count > 0) {
            term.move(1, 5);
            term(state.producers[i].title + `:${state.producers[i].count}` + 
            ` | Production per second: ${state.producers[i].baseProduction.toFixed(1)} | Cost: ${state.producers[i].cost.toFixed(1)}`);
        } else {
            for (let i = 0; i < state.producers.length; i++) {
                if (state.producers[i].count === 0) {
                    term(state.producers[i].title + `:${state.producers[i].count}` + 
                    ` | Production per second: ${state.producers[i].baseProduction.toFixed(1)} | Cost: ${state.producers[i].cost.toFixed(1)}`);
                    break;
                }
            }
        }
        state.isProducerListUpdated = true;
    }
};

handlers.js


export const handleKeyPress = (term, state) => {
    return (name, matches, data) => {
        if (String.fromCharCode(data.code) === 'G' || String.fromCharCode(data.code) === 'g') {
            state.gold = state.gold + 1;
        } else {
            if(!state.isInitCompleted) {
                for (let i = 0; i < state.producers.length; i++) {
                    if (state.gold >= state.producers[i].cost) {
                        checkInitCompleted(term, state);
                        state.isInitCompleted = true;
                    }
                }
            }
            for (let i = 0; i < state.producers.length; i++) {
                if (String.fromCharCode(data.code) === String(state.producers[i].id) && state.gold >= state.producers[i].cost) {
                    state.gold = state.gold - state.producers[i].cost;
                    state.producers[i].cost = state.producers[i].cost * state.producers[i].growthRate;
                    state.producers[i].count = state.producers[i].count + 1;
                    state.productionRate = state.productionRate + state.producers[i].baseProduction;
                    state.updateProducerList = false;
                }
            }
            if(!state.isProducerListUpdated) {
                state.updateProducerList(term, state);
            }
        }  
    };
};

Errors while running my code


updateProducerList should be exported from 'functions.js'

2. updateProducerList should be called once from handleKeyPress if isProducerListUpdated is false

3. updateProducerList should not be called from handleKeyPress if isProducerListUpdated is true

4. updateProducerList should start printing at the beginning of the fifth line by calling moveTo(1, 5)

5. handleKeyPress arguments should be forwarded into updateProducerList

6. checkInitCompleted should change the value of isProducerListUpdated to false

7. updateProducerList should print out the producer information in expected format using a single string

8. updateProducerList should print out all the producers where the count is greater than 0

9. updateProducerList should print one extra producer with the 0 count and next cost value

10. updateProducerList should set the flag isProducerListUpdated to true once it finishes the update