Not in vs Not Exists
They both (“NOT IN” and “NOT EXIST”) have the same functionality with only one major difference: “NOT IN” will return a “NULL” if there are any NULL column(s) in the subquery. “NOT EXISTS” does not … Read more
Category : Programming
Programming
What the heck is a domain object?
I would be reading a tutorial and all of sudden the author mentions “domain object”. What the heck is a domain object? “Domain objects form the backbone of any application. They capture the core data … Read more
PHP Include and Require (Absolute and Relative Links)
How does the include (include_once) and require (require_once) functions work? Everytime I step away from PHP, I seem to forget how the include and require work with respect to absolute and relative links. PHP includes the “include/require … Read more
Difference Between $this and self in PHP
What is the real difference between $this and self:: ? A simple Google search will return several sites that show a definition such as this one: “Use $this to refer to the current object. Use … Read more
Tricks to Identify the Technologies that a Web Site is Using
I have been asked several times to identify the technologies that a particular web site is using (from Operating System , Webserver , Javascript Framework and so on… Sometime it it very straighforward other times … Read more