Events and EventEmitter in Node.js
What Are Events in Node.js? Node.js is designed around an event-driven architecture. This means that instead of waiting for tasks like file operations or HTTP requests to finish, Node.js uses events to signal when these tasks are complete. To manage
Digital Signature using Zoho Creator
Digital signatures/online signatures, as we all know, play a very important role in online industry. The simple idea of using a digital signature results in reducing the paperwork and saves time. Zoho Creator has provided “signature” feature for online signing
YUI3 Panel background shading and position problems
By default YUI3 assigns yui3-widget-mask class for background shading. To override that we need to change its style properties. Similarly for position of the panel, it can be changed by specifying position property of .yui3-panel class. These are the methods
Eclipse – Stop auto jumping to the file in project explorer (disable link with editor)
When you switch among opened files in eclipse, project explorer moves to the currently active file (in left pane). This can be annoying several times. To disable this just make sure icon with double arrows in Project Explorer (top right
iFrames, Javascript events and IE problems
Several hours wasted while debugging this. We have a, HTML page and within this page is a hyperlink to open another page in iFrame. While iFrame page is loaded we display WAIT message overlay on parent page so as to
Connection Pool with Tomcat6 and Mysql
Inside $tomcat_home/conf/context.xml add this inside <Context> <Resource name=”jdbc/datasourcename” auth=”Container” type=”javax.sql.DataSource” maxActive=”100″ maxIdle=”30″ maxWait=”1000″ username=”dbuser” password=”dbpwd” driverClassName=”com.mysql.jdbc.Driver” url=”jdbc:mysql://localhost:3306/exodus”/> Now restart tomcat Inside you web.xml add this before </web-app>: <resource-ref> <description>My DB Connection</description> <res-ref-name>jdbc/datasourcename</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> Java code to connect: Context
ORA-28001: the password has expired
That’s the error you get for oracle user for whom password is expired. One Solution – Connect using sqlplus to set new password, you can even use the same password you had earlier. $ sqlplus SQL*Plus: Release 11.2.0.1.0 Production on
Oracle Privileges to Import/Export data into any tablespace
Generally we can have a single user with DBA rights to import/export (using imp/exp utilities) data into any tablespace instead of assigning these privileges to every user account. Suppose you have an oracle user appdba. Grant DBA role to appdba
Apache Config Steps – Run multiple domains on same ip
Suppose you want to point abc.mydomain.com and mydomain.com to same machine/ip, but to different applications. There are multiple ways to achieve this (basically with same config settings but in different files). I am giving one way here that worked for me: * Go to
Generating ssh keys – steps
These are the steps: Suppose you want to connect from machine X to machine Y as userme. * login to X as userme * At /home/userme run this command: ssh-keygen -t rsa This will generate 2 files in /home/userme/.ssh folder