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.…
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…
Many times we want to get a single file from svn repo but we do not want to checkout the complete repository. With the help of svn checkout we can…
There are various way to get year and month from date in PostgreSQL. 1. Extract The extract function retrieves subfields such as year or hour from date/time values. source must be a value expression…
