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How to Calculate GPA: Weighted vs Unweighted
GPA is the credit-weighted average of your grade points, not a plain average of grades. Multiply each grade's point value by its credit hours, sum the products, and divide by the total credits.
How CSS clamp() Works for Fluid Font Sizes
clamp(min, preferred, max) returns a value bounded between a minimum and a maximum, using a preferred value in the middle.
How to Convert HEX to RGB, HSL and CMYK
A color converter takes one color and re-expresses it in HEX, RGB, HSL, HWB, and CMYK at once, plus the nearest CSS color name.
vCard Format Explained, With a QR Code Example
A vCard QR code encodes your contact details, name, phone, email, company, address, in the vCard format that phones read natively.
JSON to CSV: Turn an API Response Into a Spreadsheet People Can Open
A JSON to CSV converter takes an array of objects and writes it as comma-separated rows, one column per property, so a spreadsheet can open it.
How WiFi QR Codes Work and Why They Fail
A WiFi QR code stores your network name, password, and security type in the standard WIFI: format that iPhone and Android read natively.
How to Pick a Random Winner From a List Fairly
A list randomizer either reorders a whole list at random (shuffle) or draws a random sample from it (pick).
Alfa to Zulu: History of the Spelling Alphabet
The NATO phonetic alphabet replaces each letter with a distinct code word (Alfa, Bravo, Charlie) so it cannot be misheard over a noisy line.
How to Add Hreflang in WordPress (Without a Plugin)
WordPress does not emit hreflang on its own. Hook wp_head, loop over a locale map, and print the full reciprocal set including x-default on every page in the group.