[Tutorial] Functional try catch

try-catch-snippet-03.js

const getData = (id) => {
  if (!id) {
    throw new Error('No id found');
  }

  return [1, 2, 3, 4, 5].filter(i => i  % id);
};

const tryCatch = (tryer) => {
  try {
    const result = tryer();
    return [result, null];
  } catch (error) {
    return [null, error];
  }
};


const demo03 = () => {
  const [data, err] = tryCatch(() => getData(2));
  if (data.includes(1)) {
    console.log('data', data); // [1, 3, 5]
  }
};

demo03();