Answer: All APIs of Node.js library are aynchronous that is non-blocking. It essentially means a Node.js based server never waits for a API to return data. Server moves to next API after calling it and a notification mechanism of Events of Node.js helps server to get response from the previous API call.
Source: tutorialspoint.com
| import os | |
| import csv | |
| import logging | |
| import uuid | |
| import json | |
| from typing import Dict, List, Tuple, Any | |
| from retry import retry | |
| from dotenv import load_dotenv | |
| from neo4j import GraphDatabase | |
| import pandas as pd |
Solidty's code is encapsulated in contracts. A contract is the fundamental building block of Ethereum applications -- i.e. all variables and functions belong to a contract, and are the starting point of your project. Below is an example of an empty contract called HelloWorld.
| import React, { useEffect, useState } from "react"; | |
| import axios from "axios"; | |
| export const withEditableUser = (Component, userId) => { | |
| return (props) => { | |
| const [OriginalUser, setOriginalUser] = useState(null); | |
| const [user, setUser] = useState(null); | |
| useEffect(() => { | |
| (async () => { |
| import React from "react"; | |
| import { withEditableUser } from "./withEditableUser"; | |
| // component to be passed as argument to HOC | |
| const FormComponent = ({ user, onChangeUser, onSaveUser, onResetUser }) => { | |
| const { name, age, hairColor } = user || {}; | |
| return user ? ( | |
| <> | |
| <label> |
| import { editableForm } from "./editableForm"; | |
| function App() { | |
| // do something for getting userId (parent component has controll to pass the userId after getting some) | |
| const UserInfoForm = editableForm("345"); | |
| return ( | |
| <> | |
| <UserInfoForm /> | |
| </> |
| import React from "react"; | |
| export const UserInfo = ({ user }) => { | |
| const { name, age, hairColor, hobbies } = user || {}; | |
| return ( | |
| <> | |
| <h3>{name}</h3> | |
| <p>Age: {age}</p> | |
| <p>Haircolor: {hairColor}</p> |
| import React from "react"; | |
| import { GenericUser } from "./user/GenericUser"; | |
| function App() { | |
| return ( | |
| <> | |
| <GenericUser userId="234"/> | |
| </> | |
| ); | |
| } |
| import React from "react"; | |
| import { GenericUserLoader } from "../loaders/GenericUserLoader"; | |
| import { UserInfo } from "./UserInfo"; | |
| export const GenericUser = ({ userId }) => { | |
| return ( | |
| <GenericUserLoader userId={userId}> | |
| <UserInfo /> | |
| </GenericUserLoader> | |
| ); |