Promise Chaining in nodejs

How to use callbacks in node js

//add.js
const add = (p1, p2, callback) => {
setTimeout(()=>{

nodejs javascript async callback

harika

https requests and callbacks in nodejs

//ex.js
const https = require('https')
const url = "" //Use the url you want to

nodejs callback javascript http https

harika

Create webserver using expressjs

//server.js
const express = require("express")
const app = express()

nodejs route javascript expressjs

harika

How to serve static pages using expressjs

//app.js
const path = require("path");
const express = require("express")

nodejs javascript path expressjs static pages

harika

Write a basic promise in nodejs

const mul = (a, b) => {
  return new Promise((resolve, reject)=>
    setTimeout(()=>{

nodejs async javascript promise

harika

How to use async-await with promises in nodej

const mul = (a, b) => {
  return new Promise((resolve, reject)=>
    setTimeout(()=>{

nodejs javascript async await promise

harika

How to Connect to a mongodb database using mo

const {MongoClient, ObjectID} = require(
const ConnectionURL = "mongodb://127.0.0
const DBName = "koder-mongo-app";

nodejs javascript nodemon mongodb

harika

How to Connect to a mongodb database using mo

const mongoose = require("mongoose");
mongoose.connect("mongodb://127.0.0.1:27
  useNewUrlParser: true,

nodejs mongoose javascript nodemon mondodb

harika

Python Script to create AWS beanstalk

#!/usr/bin/python
  
import boto

python aws beanstalk

sandeep

List all files and folders using python os mo

import os

def list_files_folders(path):

python python-os

kishore_kumar

Get current environment variables in python

import os
env = os.environ

python python-os

kishore_kumar

Get os details using python os

import os
print os.uname()
# Don't use os.system('uname -a'), its j

python python-os

kishore_kumar

Get stats ( lines, words, char count ) of fil

def file_stats(path):
    f = open(path, 'r')
    lines = f.readlines()

python

kishore_kumar

Use map function in python

def get_double(num):
    return num * 2

python

kishore_kumar

Python sample codes for beginners

print "Welcome to python"

python

gaya38

Python program for even number checking

a=input("Enter a value:")
if (a%2==0):
    print "The given number is even numb

python

gaya38

Python program for prime number check

a=input("Enter a value:")
k=0
b=(a/2)+1

python

gaya38

Pass command line arguments in python

import sys
x=len(sys.argv)
a=[]

python

gaya38

Python program for the largest number in an a

a = [1,43,98,5]#Dummy data
for l in range(len(a)-1):
        if (a[l]>a[l+1]):

python

gaya38

print list of even numbers within a range

n=100
a=[10,20,30,40,50]
b=[60,70,80,90]

python

gaya38