Doing Unit test in Clojure Is Easy

 Posted on 2024-11-28  (Last modified on 2025-02-26)  |  1 minutes  |  165 words

While refactoring the live reload feature of Clay, I realized I'd better break long functions into smaller and functional ones (as many as I can), which is also a common practice in the clojure community. Small pure functions not only are easy to verify on the development process (using a REPL), but also are easy to test. And unit tests are easy to write in clojure, just use deftest from clojure. [Read More]
clojure  cider  clay  tweet 

Clj-async-profiler Rocks

 Posted on 2024-11-28  (Last modified on 2025-03-09)  |  2 minutes  |  369 words

While developing the live reload feature for Clay, a minimalistic Clojure tool for data visualization and literate programming, I found that it constantly takes ~1 minute for beholder to watch a directory. After some code inspect, I was still having no idea why it happened. So I decided to use a profiler to find out what's going one under the hood, and Google immediately took me to clj-async-profiler. It's easy to set up following its basic usage docs: [Read More]
Clojure  Clay 

TailwindCSS Docs Index

 Posted on 2024-11-23  (Last modified on 2025-02-18)  |  3 minutes  |  567 words

Just re-organize the TailwindCSS Docs index in a flatter and more searchable way. Getting Started Installation | Editor Setup | Using with Preprocessors | Optimizing for Production | Browser Support | Upgrade Guide Core Concepts Utility-First Fundamentals | Hover, Focus, and Other States | Responsive Design | Dark Mode | Reusing Styles | Adding Custom Styles | Functions & Directives Customization Configuration | Content | Theme | Screens | Colors | Spacing | Plugins | Presets [Read More]
CSS  TailwindCSS 

Adding Clojure Dependencies from the Command Line

 Posted on 2024-11-09  (Last modified on 2024-11-10)  |  1 minutes  |  84 words

While debugging a live reload issue of Clay a few days ago, I learned from Markus Agwin that we can actually add dependencies on the fly from the command line, just like this: clj -Sdeps "{:deps {org.scicloj/clay {:mvn/version \"2-beta21\"}}}". Even better, we can add dependency from a Git repo and specify the commit hash: clj -Sdeps "{:deps {io.github.scicloj/clay {:git/url \"https://github.com/scicloj/clay.git\" :git/sha \"35a46541db66ae6b4e1af628b7c24c42d3be418f\"}}}", which is really helpful for experimenting and verifying things. [Read More]
Clojure  Tweet  clj 

Bitten by Lazy Sequence of map

 Posted on 2024-11-09  (Last modified on 2024-11-10)  |  1 minutes  |  167 words

While impletenting the live reload feature for Clay a few weeks ago, unfortunately, I was bitten by the laziness of map. It seems quite obvious we all know that its result is a lazy sequence, but I just can't help fall into the "trap". At that time I was adding a vector to keep track of all beholder instances watching file changes in user specified directories. So then when it's time to stop all the watchers, I used something like to achieve the goal: [Read More]
Clojure  Tweet 

Anonymous Functions in Thread Macros

 Posted on 2024-11-08  (Last modified on 2024-11-10)  |  1 minutes  |  194 words

While adding the live reload feature to Clay, I encountered a problem of applying anonymous functions to thread macros. For example, below is a simple snippet trying to wrap the input directory as a vector with the help of thread macro, but surprisingly, it errors out. After some searching, I figured out that I need to put the anonymous function into another pair of parentheses: (-> "/tmp/" #(if (vector? %) % [%])) ;; => Syntax error (ClassCastException) compiling fn* at (simple4all. [Read More]
Clojure  Tweet 

Starting a Clojure nREPL Manually for Cider

 Posted on 2024-11-08  (Last modified on 2025-02-18)  |  1 minutes  |  174 words

While troubleshooting and fixing a live reload bug in Clay today, which required to start a minimal Clojure environment, I figured out how to start a nREPL from the command line. Instead of using M-x cider-jack-in-clj directly from Emacs, actually we can manully bring up an nREPL with this: clj -Sdeps "{:deps {org.scicloj/clay {:mvn/version \"2-beta21\"} cider/cider-nrepl {:mvn/version \"0.50.2\"}}}" -m nrepl.cmdline --middleware "[cider.nrepl/cider-middleware]" (The clay part is only necessary for this debugging), and then connect to this nREPL using the Emacs command M-x cider-connect-clj. [Read More]
Cider  Clojure  Tweet 

Join Every N Lines By A Separator in Emacs

 Posted on 2023-11-25  |  2 minutes  |  248 words

It has been some time since I came along the idea of the w/join-lines command to join lines. After that, sometimes I found that it would be even better to join every a few lines. Let's see the example below, suppose we've copies some data from somewhere, and now we want to yank it into an Emacs buffer and slightly modify it to be like an matrix. That is, make it from: [Read More]
Emacs 

Restoring Emacs' Window Layouts

 Posted on 2023-11-19  (Last modified on 2025-02-26)  |  2 minutes  |  332 words

If you've been using Emacs for a while, I bet you must have encountered the annoying problem that your Emacs window layout gets messed up after some operations, such as looking for a help (e.g. C-h k), or checking things in the magit status buffer. Photo by R Mo on Unsplash I'm happy if I can just get back to the previous layout that I had before, and guess what? [Read More]
Emacs  hydra 

Emphasize Text By Dragging Mouse in Org-mode

 Posted on 2023-08-14  |  1 minutes  |  169 words

Long story short, I came up with an idea to emphasize content while I was reviewing an org-mode document a few months ago after I was tired of typing tedious * around the content repeatedly. And I've been longing for this feature since then, because I was unfamiliar with mouse-based key bindings, and neither did I have the time to investigate it. Today I finally nailed it down while I was attending a boring meeting, and it turned out to be quite simple. [Read More]
Emacs  org-mode