programmer assistant

#87
by HunterBBQ - opened

๐Ÿ˜ƒ: Hello
๐Ÿค–: Hello! I'm here to assist you in any way I can. Please feel free to ask me any questions, and I'll do my best to provide you with helpful and accurate information. If a question doesn't make sense or is not factually coherent, I'll do my best to explain why and provide alternative ways to approach the question. If I don't know the answer to a question, I'll be honest and let you know instead of providing false information.

Is there anything specific you'd like to know or discuss? I'm here to help with any questions you might have..
๐Ÿ˜ƒ: export const load = async () => {
const res1 = await fetch(
"https://www.dextools.io/shared/data/swaps?chain=arbitrum&pair=0xe2ddd33585b441b9245085588169f35108f85a6e&filter=true"
);
const data_1 = await res1.json();
const nextTimestamp = Number(data_1.data.next);

const res2 = await fetch(
https://www.dextools.io/shared/data/swaps?chain=arbitrum&pair=0xe2ddd33585b441b9245085588169f35108f85a6e&ts=${nextTimestamp}&filter=true
);
const data_2 = await res2.json();

const mergedSwaps = data_1.data.swaps.concat(data_2.data.swaps);

return {
swaps: mergedSwaps,
};
};

how to make this code better
๐Ÿค–: There are several ways to improve the code. Here are some suggestions:

  1. Use async/await instead of callbacks: The code uses callbacks to handle the responses from the fetch API. Instead, you can use async/await to make the code look more synchronous and easier to read.
  2. Use type annotations: The code doesn't have type annotations for the variables, which can make it harder to understand the data types being used. Adding type annotations can help catch type-related errors at compile-time and make the code more readable.
  3. Use destructuring: The code uses await res1.json() and await res2.json() to extract the JSON data from the responses. Instead, you can use destructuring to extract the data in a more concise way.
  4. Use Promise.all(): Instead of fetching the data in two separate fetch calls, you can use Promise.all() to fetch both datasets simultaneously and then concatenate them.
  5. Use a constant for the URL: Instead of hardcoding the URL in two places, you can define a constant for it and use it wherever necessary.
  6. Use a template literal for the URL: Instead
    ๐Ÿ˜ƒ: give me the code for test
    ๐Ÿค–: Sure, here's an example of how you can test the load function using Jest:
import { load } from './load';

describe('load', () => {
  it('returns a promise that resolves to an object with a swaps property', async () => {
    const result = await load();
    expect(result).toHaveProperty('swaps');
  });

  it('fetches data from dextools.io', async () => {
    const fetchMock = jest.fn();
    const result = await load(fetchMock);
    expect(fetchMock).toHaveBeenCalledTimes(2);
  });

  it('concatenates data from multiple fetch calls', async () => {
    const fetchMock = jest.fn();
    const result = await load(fetchMock);
    expect(result.swaps).toHaveLength(2);
  });

  it('handles errors', async () => {
    const fetchMock = jest.fn();
    fetchMock.mockImplementationOnce(() => {
      throw new Error('Network error');
    });
   

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