miladvafaeifard

import is from './is-util';

/**
 * Either Monad class (from Functional Programming in JavaScript)
 */
class Either {
  constructor(value) {
    this._value = value;
  }
  get value () {

miladvafaeifard

main :: IO ()
main = do
    print(map doubleIt [1, 2, 3])

doubleIt :: Int -> Int
doubleIt x = x * 2

miladvafaeifard

In C#, an Enumerator with the "yield" keyword is used to create an iterator method that simplifies the process of iterating over a collection of elements. The "yield" keyword allows you to define an iterator method by repeatedly yielding (returning) individual elements from the collection without explicitly creating an entire collection in memory. This approach is particularly useful for large or dynamically generated data sets, as it improves efficiency and memory usage.

By using "yield," you can create a custom iterator method that produces values one at a time, on-demand, while abstracting away the complexity of managing an explicit enumerator. This results in cleaner and more readable code for iterating through collections or sequences.

using System;
using System.Linq;
using System.Collections.Generic;

public class Program

miladvafaeifard

In bash shell scripting, the if statement supports the following options for testing conditions:

-a: Tests if a file exists.
-b: Tests if a file exists and is a block special file.
-c: Tests if a file exists and is a character special file.
-d: Tests if a file exists and is a directory.
-e: Tests if a file exists (same as -a).
-f: Tests if a file exists and is a regular file.
-g: Tests if a file has its setgid bit set.
-h: Tests if a file is a symbolic link (same as -L).

miladvafaeifard

import http from "node:http";
import fs from "node:fs";
import { Transform } from "node:stream";

function upperCaseTransform() {
  return new Transform({
    transform(chunk, encoding, next) {
      this.push(chunk.toString().toUpperCase());
      next();
    },

miladvafaeifard

function generateRandomNumber(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

miladvafaeifard

How to install Java JDK Java Development Kit on mac.
In Mac OS or later, Apple recommends to set the $JAVA_HOME variable to /usr/libexec/java_home, just export $JAVA_HOME in file ~/. bash_profile or ~/.profile.
Find out where is JDK 14.

$ /usr/libexec/java_home -v14
/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home

$ vim .bash_profile
export JAVA_HOME=$(/usr/libexec/java_home)

miladvafaeifard

# touch phcopy then mv this file to /usr/local/bin with chmod -R 755
clip.exe

miladvafaeifard

import fetch from 'node-fetch';
import { setTimeout } from "node:timers/promises";

const cancelRequest = new AbortController();
const cancelTimeout = new AbortController();

export async function timeout(delay) {
  try {
    await setTimeout(delay, undefined, { signal: cancelTimeout.signal });
    cancelRequest.abort();

miladvafaeifard

wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash

echo 'export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm' >> ~/.profile

source ~/.profile

nvm -v