Contributing

How do you check whether the user is logged in or not in PHP? php session_start(); include “db. php”; $username = $_POST[“username”]; $password = $_POST[“password”];…

Can I mix memory sizes on my iMac? Adding a pair of RAM sticks to your iMac? As long as the specs are correct, should…

How do I find the contrast ratio of a website? The Contrast Checker from WebAIM is an online tool to test the contrast ratio. All…

At what battery percentage should you charge? The golden rule is to keep your battery topped up somewhere between 30% and 90% most of the…

How do you transfer data from one component to another using hooks? First, you’ll need to create two components, one parent and one child. Next,…

When does a stored procedure fail in SQL? If you know the number of rows you are expecting to insert, the stored proc can return…

Can I use EURion Constellation? According to research from 2004, the EURion constellation is used for colour photocopiers but probably not used in computer software.…

Should I compress files before uploading? Compressing and uploading smaller file will be faster than uploading uncompressed, bigger data. But to make sure we don’t…

How do I boot from Kali Linux? First Make bootable USB drive for Kali Linux. Run the Dialog Box type diskmgmt.msc. Specify the amount of…

How do I iterate a stream? Java 8 Stream. iterate examples Stream. iterate. 1.1 Stream of 0 – 9 //Stream.iterate(initial value, next value) Stream.iterate(0, n…