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var vs let vs const in Javascript

var, let and const are used to declared variables in Javascript. VAR Used to declare variables as global scoped or function scoped. A global scoped variable is accessible anywhere in…

Add custom marker on a leaflet map

1. Get images Two images are required to make a custom icon, the image itself and a shadow of the image. For a better look the image background should be…

Calculate IP Addresses using PHP

We are going to use two functions PHP networking functions ip2long() and long2ip() ip2long() – Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer. long2ip()…

JavaScript convert NaN to 0 using double tilde

In computing, NaN (not a number) is a numeric data type that means a value is undefined or cannot be represented. To convert NaN to 0 in JavaScript, use the…

Node.js HTTP request using axios

There are many libraries that you can use to make HTTP request in Node.js.For this case we will create a simple HTTP request using axios. Requirements:Node.js projectNode package manager Install…