mklbtz

// From: http://www.figure.ink/blog/2019/11/9/parse-dont-validate
// Original: https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate/#2019-11-05-parse-don-t-validate-footnote-1-return

/* Haskell
head :: [a] -> a
head (x:_) = x
*/
func head<A>(_ array: [A]) -> A {
    return array[0] // Crashes at runtime when array is empty.
}

mklbtz

{
    "selector": "source.swift",
    "shell_cmd": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift \"${file}\"",
    "file_regex": "^(.+\\.swift):([0-9]+):?([0-9]+)?:? (?:error|warning|note): (.*)$"
}

mklbtz

on launchDisplaysPane()
	tell application "System Preferences"
		activate
		set displayPane to pane "com.apple.preference.displays"
		set displayTab to anchor named "displaysDisplayTab" of displayPane
		reveal displayTab
		delay 0.5
	end tell
end launchDisplaysPane

mklbtz

from datetime import datetime, timedelta
import sys

class Stopwatch:
    def __init__(self):
        self._hacks = []

    @property
    def laps(self):
        return len(self._hacks) - 1

mklbtz

from __future__ import print_function

class NoneError(TypeError):
    pass

class maybe:
    """
    A two-state monad that represents the presents or absence of a value.
    Think of it as a collection of zero or one values.
    """

mklbtz

No Opportunities*
  parts uploaded -> Estimate Requested

Estimate Requested
  Reviewing Parts*
    Unclean*
      redact prints -> Reviewing Parts
      upload dummies -> Reviewing Parts
      all parts clean -> Clean
    Clean

mklbtz

In the course of time, I found myself wanting to run RSpec automatically in response to file changes. I found a nice tool called fswatch to handle the file events, but I wanted a "smarter" pipeline. Following the Unix philosophy, I wrote a few tiny command line tools which I've provided the source to.

• specname — maps a file in a rails project to its corresponding spec file.
• debounce — makes sure multiple rapid saves don't trigger as many RSpec runs.
• throttle — could be used to collect multiple file changes into one RSpec run, but I haven't figured that last part out yet.

The core functions are fully generic and have no dependencies on anything but Foundation, so they could be easily incorporated into a larger project if there's a use for them.

mklbtz

class View
  def self.image(url:)
    Image.new.tap { |img| img.url = url }
  end

  def self.button(title:)
    Button.new.tap { |btn| btn.title = title }
  end

  def self.stack(subviews)

mklbtz

New literal for Data from contents of file

• Proposal: SE-NNNN
• Authors: Michael Bates
• Review Manager: TBD
• Status: Awaiting implementation

Introduction

In Swift today, literals give us the ability to embed files, images, and colors directly into our programs. This proposes a new literal that will embed the contents of a file as Data. The proposed syntax is…

mklbtz

class AbsoluteDirectory < AbstractPath
  def self.root
    AbsoluteDirectory.new(nodes: [])
  end

  def initialize(nodes:)
    raise "Last node cannot be a file, got (#{nodes.last.class})" if nodes.last&.file?
    if nodes.first&.root?
      super(nodes: nodes)
    elsif nodes.first&.current?