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[HttpPost]
public ActionResult Login(LoginViewModel model, string returnUrl)
{
    var user = _userService.GetByEmail(model.Email);

    //check username and password from database, naive checking: password should be in SHA
    if (user != null && (user.Password == model.Password)) 
    {
        var claims = new[] {
                new Claim(ClaimTypes.Name, user.Name),

Vikaskumargd

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

Vikaskumargd

using MyUniversity.Models;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
 
namespace MyUniversity.DAL

Vikaskumargd

public static Func<A, R> Memoize<A, R>(this Func<A, R> f)
{
  var map = new Dictionary<A, R>();
  return a =>
    {
      R value;
      if (map.TryGetValue(a, out value))
        return value;
      value = f(a);
      map.Add(a, value);

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public class AsyncMediatorPipeline<TRequest, TResponse> : IAsyncRequestHandler<TRequest, TResponse> where TRequest : IAsyncRequest<TResponse>
    {

        private readonly IAsyncRequestHandler<TRequest, TResponse> inner;
        private readonly IAsyncPreRequestHandler<TRequest>[] preRequestHandlers;
        private readonly IAsyncPostRequestHandler<TRequest, TResponse>[] postRequestHandlers;

        public AsyncMediatorPipeline(IAsyncRequestHandler<TRequest, TResponse> inner, IAsyncPreRequestHandler<TRequest>[] preRequestHandlers, IAsyncPostRequestHandler<TRequest, TResponse>[] postRequestHandlers)
        {
            this.inner = inner;

Vikaskumargd

{
    "version": "0.2.0",
    "configurations": [
      {
        "name": "Debug CRA Tests",
        "type": "node",
        "request": "launch",
        "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/react-scripts-ts",
        "runtimeArgs": [
          "--inspect-brk",

Vikaskumargd

import { useState, useEffect } from "react";

export const useFetch = (url, ref, initialValue) => {
  const [data, setData] = useState(initialValue);
  const [error, setError] = useState(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    if (ref.current) {
      (async () => {

Vikaskumargd

/**
 * List unique CSS properties for all DOM elements
 * Initially created to list unique font stacks on a page
 * @see {@link http://stackoverflow.com/a/35022690/ Inspired by this StackOverflow answer}
 *
 * @see {@link https://gist.github.com/macbookandrew/f33dbbc0aa582d0515919dc5fb95c00a/ URL for this file}
 *
 * @author AndrewRMinion Design (https://andrewrminion.com)
 * @version 1.1
 *