It is widely spoken that the Equation Editor of Word (OneNote / Office) is inferior and harder to use than LaTeX. While this is true for a hardcore user, a lot of people spreading the word aren’t really understanding the thing and are just parroting others. I suspect that for a lot of them, the ability to efficiently typeset beautiful mathematical formulae is limited by knowledge and carefulness. People don’t seem to care enough to learn and correctly employ the tools at hand.
Blog entries with tag “Programming”
A commit to Ant Design, an enterprise-oriented open-source Web UI library by Ant Financial (蚂蚁金服), on 10 September 2018 buried an Easter egg for Christmas, which has caused a heck of havoc since Christmas. This entry also talks about not-so-obvious features in my blog.
PowerShell 6.1.0 (preview) messes verbs of directories, causing Previous Versions to open previous verions of a directory in PowerShell
Issue #6799 in PowerShell repository on GitHub raises the question why Previous Versions is opening previous versions of a directory in PowerShell, instead of File Explorer as expected. The reason is that PowerShell 6.1.0 (preview) installer creates a context menu to open the shell on any folder. However, it unfortunately names the verbs as open/runas, which is very dangerous since they are canonical and do not make much sense for a folder. Related is issue #7815, where shortcuts to a folder are opened in PowerShell.
Continuing ‘Hosting a preview handler in WPF, part 1: UI and file associations’, we will do the major COM interop in this entry. Many people have failed to host the handler correctly because of careless implementation, so look carefully! Also, we will demonstrate some broken preview handlers, including ‘Adobe PDF Preview Handler for Vista’, ‘Microsoft Word previewer’ and ‘Microsoft PowerPoint previewer’.
As a fanboy of Raymond Chen, I’m always intrigued by Windows Shell. After his three interesting examples of Reading a Contract From the Other Side, I decided to write one myself. Our victim is Preview Handlers and Shell Preview Host. Today’s entry will prepare UI and file association information retrieval for our little program.
Have you ever tried using UseNewEnvironment switch when invoking Start-Process cmdlet? Intuitively, turning it on makes the newly created process use the default environment instead of that of the parent process. However, its semantics is way more complicated, obscure and buggy than the intuition. TL; DR: You rarely want to use this switch.
I have heard about λ-calculus as a computational model for long, but never got a chance to have an even recreational look at it. Today’s entry simply records the creating of the parser.
When you open VS2015 Command Prompt from a newly installed instance of Visual Studio 2017 Community, the prompt fails to intialise the variables. Telling you to ‘make sure either Visual Studio or C++ Build SKU is installed’. Searching the Internet, this seems to be a known and persisting issue. Here I propose an elegant workaround for it.
Base conversion is the conversion between notations of number, and NOT the numbers themselves. I discuss a common mistake on methods of base conversion, and a common mistake in thinking about ‘base conversion’ in computer programs.
姚栋想要知道如何在 Windows 中使用命令解压缩 ZIP 文件夹。他表示如果要用 .NET Framework 提供的 API，则需要 4.5，但环境要求 4.0；如果用 PowerShell Expand-Archive 命令，则需要 5.1，但环境只允许 2.0；想用 cmd，但不知道怎么做。然而应该时刻记住：Windows 自带的 GUI 实际上经常是 COM 的图形版，在 COM 中寻找几乎总是可以找到你想要的图形操作的命令版本。
This entry explores an interesting case of CRTP (curiously recurring template pattern) in C♯ that allows us to use operators. The other topic is elegant implementation of generic parameters that are (semantically) values instead of types.
A practical problem I encountered in 2016, which I insisted on implementing with pure CSS as long as it was possible. At first it was solved with mathematical logic tricks but later it turned out there was a much simpler solution.