Objects in JavaScript can be thought of as maps between keys and values. We can remove these keys, more commonly known as object properties. In this tutorial, we will learn…
There may be a requirement to merge or flatten the array of array for better representation or readability. There are various ways to achieve this in javascript. We will try…
We can generated all possible combination of alphabets or number using python with only few lines of code. We can use these combination to give unique identity to any one.…
We can generate fixed length random number using Math.random() function. Math.random can generate number between 0 to 1. We can use this to generate any length random number. function randomNumber(length)…
Using NodeJS we can create ssh connection to send file or executing any command on Linux based server. Here we are using npm module ssh2 for sftp connection to transfer…
Many time we want run query with in query to get desirable result. MongoDB provide a aggregation operator to achieve result like this. Lets assume we have a collection with…
If we want SQL like "Like" operator in Mongo DB for string matching. But in mongo DB there is no such "like" operator instead it has regular expression to achieve…
The ternary operator is very useful for a single condition. But support ternary operator different way, not like other programming languages (?:). Syntax: A if C else B This first…
