Manage Node version

https://www.digitalocean.com/community/tutorials/how-to-install-node-js-with-nvm-node-version-manager-on-a-vps

java collection find elemts

http://www.java2novice.com/java-collections-and-util/arraylist/contains/

Javascript tutorial

https://www.javascript.com/learn/strings

git check commit

https://github.com/saleshuddlegroup/backend-version-1.5/commit/ed92951e4671211d6757377efe111d7657885894

exact word search from mysql

SELECT 
    *
FROM
    `table`
WHERE
    Description regexp '(^|[[:space:]])pen([[:space:]]|$)';

remove empty and undefiend keys from object

lodash  library

var object = { 'a': 1, 'b': '2', 'c': "" };

_.pickBy(object, _.identity);
// => { 'a': 1, 'c': 3 }