Thắng Lê

Case study: the SVG malware scam aimed at freelance devs

Thắng Lê — Tue, 26 May 2026 16:56:23 GMT

The full story of exposing a Next.js repo hiding malware inside an SVG file, from the job offer message on a freelancer platform to tracking down the eval call.

Do it first before buy

Thắng Lê — Wed, 15 Apr 2026 16:59:19 GMT

They reckon they’ve caught a very common spending disease: Buy-Before-You-Do syndrome.

Back when they first took

[Note] Wiping every node_modules folder to free up disk space

Thắng Lê — Mon, 02 Feb 2026 10:06:38 GMT

A few dozen old projects means a few dozen GB of disk gone to node_modules. How to check the size first, then wipe every node_modules folder on macOS, Linux and Windows.

[Note] Ignoring tracked files and the ignore layers in Git

Thắng Lê — Sat, 31 Jan 2026 12:44:38 GMT

A quick note on the syntax for ignoring already-tracked files in Git with skip-worktree, plus the three ignore layers: global, local repo, and the shared team gitignore.

[C#] What is the explicit/implicit operator actually useful for?

Thắng Lê — Fri, 06 Jun 2025 16:53:38 GMT

What are explicit and implicit casting in C# good for? Three practical examples: converting a model to a DTO, dropping the ToString override, and assigning values.

Converting a model to a DTO with an operator in C#

Thắng Lê — Sun, 01 Jun 2025 04:53:16 GMT

Instead of writing a ToDto method or reaching for AutoMapper, this post uses the explicit operator in C# to convert a model class into a DTO class when responding to the client.

How to create and run worker service C# in Linux?

Thắng Lê — Tue, 17 Dec 2024 15:30:22 GMT

Running a background process on Linux is a common requirement for developers, especially when deploying worker services built with C#.

A few notes on the OS - single-tasking vs multitasking

Thắng Lê — Sat, 05 Oct 2024 16:25:25 GMT

A few notes on how the operating system handles programs: single-tasking and multitasking, uniprogramming and multiprogramming, time-sharing, hyper-threading, multi-core, and the kinds of multitasking.

A few basic git workflows, enough to get by

Thắng Lê — Wed, 10 Jul 2024 18:36:51 GMT

Below is a round-up of the most basic commands, the ones anyone who has been at this a while has used already. As far as I can tell this

Should you use Any, Contains or Exists in C#?

Thắng Lê — Mon, 03 Jun 2024 18:24:32 GMT

Any, Contains or Exists in C#, which one should you use? A look at how each one works, how they differ, and a speed comparison to pick the right one.

How do concurrent and parallel processing differ across programming languages?

Thắng Lê — Sun, 21 Feb 2021 14:59:49 GMT

Explaining how concurrent processing and parallel processing differ, from synchronous and asynchronous programming to how they actually run.

[TIL] Accepting LinkedIn connection requests in bulk

Thắng Lê — Tue, 17 Nov 2020 16:35:46 GMT

When LinkedIn connection invites pile up to the point where clicking Accept makes your hand sore, here is a console script to accept them all in bulk.

How to trim leading zeros from a string number in JS

Thắng Lê — Wed, 14 Oct 2020 05:30:35 GMT

If you have a string number with leading zero. Example 001, 002, 01, …. How to remove it? In this simple post, I’ll show you how can we

npm and npx - What is the difference?

Thắng Lê — Tue, 12 May 2020 14:23:39 GMT

If you have ever wondered how npm and npx differ, or what they even are, this post is for you. Explaining npm, npx, and the difference between them.