Elegant Error Handling Code Samples

ap-left.js

/* Rest of Left class is hidden to save space */

    // Ap In Left (the sad path)
    ap() {
        return this;
    }

ap-right.js

/* Rest of the Right class is hidden to save space */

    // In Right (the happy path)
    ap(otherEither) {
        const functionToRun = otherEither._value;
        return this.map(functionToRun);
    }