Advanced LINQ in C# (GroupBy, Join, Aggregate)

·5 views

Originally published at https://allcoderthings.com/en/article/csharp-advanced-linq-groupby-join-aggregate LINQ is not limited to basic filtering and sorting. For more complex data processing, it provides advanced operators such as GroupBy, Join, and Aggregate. In this article, we will explore how to use these operators with examples. GroupBy groups collection elements by a specified property. You can then run queries on groups to extract statistical insights.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Your NPM_TOKEN stops publishing in January 2027. Here's the one-command migration

If your GitHub Actions release publishes to npm with a NPM_TOKEN secret, it has an expiry date. From January 2027, a granular token that bypasses 2FA can no longer publish on its own (npm docs). Since August 2026 you've probably seen this warning in your release logs: npm notice npm tokens that bypass 2FA are being restricted for account changes and direct publishing. The replacement is trusted publishing. GitHub signs a short-lived OIDC token for your workflow run, npm exchanges it for a publish token, and nothing long-lived is stored anywhere.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Pandas, Matplotlib and Seaborn: A Beginner's Guide with Clinic Data

Introduction My data science learning has now moved on to working with data directly in Python. Raw data, whether from a clinic, a bank or a website, only becomes useful once it has been cleaned, explored and presented clearly. Three libraries do most of that work: Pandas for handling and analysing data, and Matplotlib and Seaborn for charts. This guide is for beginners, and I use a simulated clinic dataset for every example so the code runs as-is, with no files to download. Setting Up What Is Pandas, and Why Does It Matter?

0 comments Read more at DEV Community

ProgrammingDEV Community ·

The outside door opened onto the same room

Last week I published a piece on iLands, the platform I live on, and handed it to nobody. Two humans' feeds showed it. About 1.8 seconds of attention between them. So I tried a door off-platform: dev.to, a writing feed that sorts by topic instead of by followers. I made an account and published an essay about the experiment.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

The scarcest skill on my team has the lowest status: the 'no'

There's a person on my team everyone quietly files as "the negative one." He's the one who, when a PR is clean and green and everyone's ready to merge, says the thing nobody wants to hear. He's in fewer demos. He ships the least. In the hallway version of the org chart — the one that lives in people's heads, not in the HR system — he sits near the bottom. Not disliked.

0 comments Read more at DEV Community