jeffkreeftmeijer

Saving Vim Macros

To record a macro, press q in normal mode, followed by a paste registry to store the macro in. To define a quick macro to use a couple of times, I usually use the q registry, meaning I type qq. Vim will tell you you’re currently recording a macro in the status line.

--recording @q

Vim will now record your commands to be used later. For example, to convert a markdown-style link ([Jeff Kreeftmeijer](https://jeffkreeftmeijer.com)) to an asciidoc-style one (Jeff Kreeftmeijer) one, the recorded macro looks like this ^[1]:

f(di(F[Pa:^[f(xx

---

1. A subsitution might be a better fit for this specific case

jeffkreeftmeijer

cargo install --locked

While installing cargo-generate I ran into an error compiling caused by missing type annotations in cargo itself.

link:e0283.txt[role=include]

An already-closed issue in Cargo explained that the issue originated in the serde crate, and was already resolved. While waiting for a patched release, users were advised to use cargo install --locked.

jeffkreeftmeijer

ffmpeg -i nightfall.mov -filter_complex "fps=10,scale=960:-1" nightfall.gif

jeffkreeftmeijer

Embrace email, mute Slack. A policy for handling incoming messages

jeffkreeftmeijer

fn count_down() {
  "3... 2... 1..."
}

fn blast_off() {
  "BOOM!"
}

pub fn launch() {
  [

jeffkreeftmeijer

Visualising recursive function calls in Elixir

For SICP Exercise 1.14 in Elixir, we'll first implement the count_change/1 function, which calculates how many different ways there are to make change using half-dollars (50 ¢), quarters (5 ¢), dimes (5 ¢) and pennies (1 ¢) for any given amount of money.

iex -r counting_change.exs
Erlang/OTP 23 [erts-11.0.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]

jeffkreeftmeijer

--exclude=node_modules

--langdef=Elixir
--langmap=Elixir:.ex.exs
--regex-Elixir=/^[ \t]*def(p?)[ \t]+([a-z_][a-zA-Z0-9_?!]*)/\2/f,functions,functions (def ...)/
--regex-Elixir=/^[ \t]*defcallback[ \t]+([a-z_][a-zA-Z0-9_?!]*)/\1/c,callbacks,callbacks (defcallback ...)/
--regex-Elixir=/^[ \t]*defdelegate[ \t]+([a-z_][a-zA-Z0-9_?!]*)/\1/d,delegates,delegates (defdelegate ...)/
--regex-Elixir=/^[ \t]*defexception[ \t]+([A-Z][a-zA-Z0-9_]*\.)*([A-Z][a-zA-Z0-9_?!]*)/\2/e,exceptions,exceptions (defexception ...)/
--regex-Elixir=/^[ \t]*defimpl[ \t]+([A-Z][a-zA-Z0-9_]*\.)*([A-Z][a-zA-Z0-9_?!]*)/\2/i,implementations,implementations (defimpl ...)/
--regex-Elixir=/^[ \t]*defmacro(p?)[ \t]+([a-z_][a-zA-Z0-9_?!]*)\(/\2/a,macros,macros (defmacro ...)/

jeffkreeftmeijer

Vim Substitutions

Table of Contents

• History
  • Regular events
  • Regular expressions in QED

History

Regular events

^{[1] [2]}

Regular expressions in QED

---

1. Representation of Events in Nerve Nets and Finite Automata

2. The Theory of Regular Events

jeffkreeftmeijer

class Foo         
  def foo
    puts "ok!"
  end 
end 
 
Foo.prepend(Module.new do
  def foo
    puts "prepend!"
    super

jeffkreeftmeijer

Terminal colors with ANSI escape sequences

Terminal emulators use ANSI escape sequences to --amongst other things like controlling the cursor’s position-- read the desired text and background color when printing output.

$ echo -e "\033[31mred\033[m" # Prints "red" in red.

While most terminal emulators, including Apple’s Terminal.app, support true color now, most utilities use one of the main sixteen colors (black, red, green, yellow, blue, magenta, cyan, white, and a high intensity or bright version of each). For example, git shows diffs with additions in green and deletions in red, and most testing frameworks print green dots and red "F"s for failures.