Learn how GROUPBY passes both subset and full arrays into LAMBDA in Excel, letting you compute percent shares fast and explain results clearly.

January 13, 2026 • A historian of modern China, Jung Chang turns the lens back on herself in her newest book to understand how she sees the world and why she writes about China today.

January 12, 2026 • The judge ordered the restoration of nearly $12 million in funding to the American Academy of Pediatrics, including money for rural health care and the identification of ...

Within each content area, there are one or more tutorials. Each tutorial consists of lessons. Each lesson should be a page detailing the concept being taught, along with sample code. Lesson and page ...

U.S. will leave 66 international organizations as Trump further retreats from global cooperation President Donald Trump on Wednesday signed an executive order suspending U.S. support for dozens of ...

How to compare two excel files for differences? Using this web tool, you can compare Excel document easily. Just select first/original file in left window and second/modified file in right window.