rameshbaskar

function getRandomItemsFromArray(sourceArray, numOfItems) {
  if (numOfItems > sourceArray.length) {
    throw new Error('Trying to get more items than the array length!!!');
  }
  const shuffledArray = sourceArray.concat().sort((() => Math.random() - 0.5);
  return shuffledArray.slice(0, (numOfItems - 1));
}

// The concat() function returns a copy of the sourceArray so that the original array is not modified.

rameshbaskar

function sortArray(arr) {
  return arr.sort((a, b) => a - b);
}

const arr = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5];
console.log(sortArray(arr));

rameshbaskar

# ensure to run 'pip install passlib'
from passlib.context import CryptContext

plain_text = 'Password@123'

pwd_context = CryptContext(
    schemes=['pbkdf2_sha256'],
    default='pbkdf2_sha256',
    pbkdf2_sha256__default_rounds=40000
)

rameshbaskar

import copy

# Base list
list1 = ["apple", "banana", "cherry"]

print("By default Python creates variables by reference")
list2 = list1

print("Now while list2 and list1 seems like two variables they refer to the same memory reference")
print("So modifying one variable will modify the others")

rameshbaskar

import json

# No need to specify the "r" (ie. open the file in read-only mode) as it is the default
def parse_json(json_file_path):
    json_data = None
    try:
        file = open(json_file_path, "r")
        json_data = json.load(file)
    except:
        print("Something went wrong while opening JSON file: " + json_file_path)

rameshbaskar

// a refValue of 0.5 will generate equal amount of true and false
// a refValue greater than 0.5 will generate more true values
// a refValue less than 0.5 will generate more false values
const randomBoolean = (positiveBias = false) => {
  const refValue = positiveBias ? 0.8 : 0.5;
  return Math.random() < refValue;
};

rameshbaskar

import Nano from 'nano';

const {
  DB_HOST,
  DB_PORT,
  DB_USER,
  DB_PASSWORD,
  DB_NAME
} = process.env

rameshbaskar

import mysql from 'mysql';

const {
  DB_HOST,
  DB_USER,
  DB_PASSWORD,
  DB_NAME
} = process.env

export const database = mysql.createPool({

rameshbaskar

// Using util.promisify()
async function sleep(ms) {
  console.log('Waiting...');
  await require('util').promisify(setTimeout)(ms);
}

console.log('initial log');
sleep(5000).then(() => {
  console.log('after sleep');
});

rameshbaskar

async function capitalize(text, timeout) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      let firstChar = text.charAt(0);
      if (text.charAt(0).toUpperCase() === firstChar) {
        reject('First character is already capitalized');
      } else {
        resolve(text.charAt(0).toUpperCase() + text.slice(1));
      }
    }, timeout);