JAVA – What is a serialVersionUID and why should I use it
SERIALIZATION: To serializean object means to convert its state to a byte stream so that the byte stream can be returned...
PHP – Convert from MySQL datetime to another format with PHP
Date is important aspect in developing applications such as storing user registration date time ,last login time, date of...
Linux – /usr/bin vs /usr/local/bin on Linux
/usr/bin: The /usr/bin Directory. /usr/bin is a standard directory on Unix-like operating systems that contains most of the...
What does “–” (double-dash) mean? (also known as “bare double dash”)
Double dash: The double dash “–” means end of command line flags i.e. it tells the preceding command not...
Check if PHP session has already started
SOLUTION 1 As you probably already know, session_start is an in-built PHP function that will start a new session. The...
[Solved -7 Answers] CSS – Is the recommendation to include CSS before JavaScript invalid
PROBLEM: In countless places online we have seen the recommendation to include CSS prior to JavaScript. The reasoning is...
How can I replace a string in a file(s)
Replacing strings in files based on certain search criteria is a very common task. How can I replace string foo with bar in...
JAVASCRIPT – How to get a timestamp in JavaScript
timestamp in JavaScript: The Date.now() method returns the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC....
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ
Double and Triple equals operator in PHP A double = sign is a comparison and tests whether the variable / expression /...
CSS – What is the difference between visibility:hidden and display:none
Definition and Usage of Visibility Property : The visibility property specifies whether or not an element is visible....
