Method compute

Calculator/app.js:35–62

()

    }

    compute(){
        let computation;
        let prev = parseFloat(this.previousOperant);
        let current = parseFloat(this.currentOperant);

        if(isNaN(prev) || isNaN(current))
            return;
        switch(this.operation){
            case '+' :
                computation = prev + current;
                break;
            case '−' :
                computation = prev - current;
                break;
            case '×' :
                computation = prev * current;
                break;
            case '÷' :
                computation = prev / current;
                break;
            default:
                return;    
        }
        
        this.currentOperant = computation;
        this.operation = undefined;
        this.previousOperant = '';
    }

    updateDisplay(){
        this.resultElement.innerText = this.currentOperant;