Will Han xingheng

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2025-03-24: Commenting is disabled permanently. Previous comments are archived at web.archive.org. ]

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

To forward X11 from inside a docker container to a host running macOS

Install XQuartz: https://www.xquartz.org/
Launch XQuartz. Under the XQuartz menu, select Preferences
Go to the security tab and ensure "Allow connections from network clients" is checked.
Run xhost + ${hostname} to allow connections to the macOS host *
Setup a HOSTNAME env var export HOSTNAME=`hostname`*
Add the following to your docker-compose:

 environment:

	import "hash"

	private rule Macho
	{
	meta:
	description = "private rule to match Mach-O binaries"
	condition:
	uint32(0) == 0xfeedface or uint32(0) == 0xcefaedfe or uint32(0) == 0xfeedfacf or uint32(0) == 0xcffaedfe or uint32(0) == 0xcafebabe or uint32(0) == 0xbebafeca

	}

	As of iOS 11/macOS High Sierra, and only including ones in Foundation and CoreFoundation

	Strings:

	_NSCFString - a CFStringRef or CFMutableStringRef. This is the most common type of string object currently.
	- May have 8 bit (ASCII) or 16 bit (UTF-16) backing store
	_NSCFConstantString - a compile time constant CFStringRef, like you'd get with @"foo"
	- May also be generated by dynamic string creation if matches a string in a pre-baked table of common strings called the StringROM
	NSBigMutableString - an NSString backed by a CFStorage (https://github.com/opensource-apple/CF/blob/master/CFStorage.h) for faster handling of very large strings
	NSCheapMutableString - a very limited NSMutableString that allows for zero-copy initialization. Used in NSFileManager for temporarily wrapping stack buffers.

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<!-- Launch Daemon do not always have access to all the path variables
	As a results, scripts will sometimes fail if the you are using path variables inside them
	To enable the script to have access to all path variables, open up a terminal and type in -->
	<!-- echo $PATH -->
	<!-- You can opt to filter out some of the path variables which are not required by script-->
	<key>EnvironmentVariables</key>

	class RSVerticallyCenteredTextFieldCell: NSTextFieldCell {
	var mIsEditingOrSelecting:Bool = false

	override func drawingRect(forBounds theRect: NSRect) -> NSRect {
	//Get the parent's idea of where we should draw
	var newRect:NSRect = super.drawingRect(forBounds: theRect)

	// When the text field is being edited or selected, we have to turn off the magic because it screws up
	// the configuration of the field editor. We sneak around this by intercepting selectWithFrame and editWithFrame and sneaking a
	// reduced, centered rect in at the last minute.

	class Tuple(tuple):
	def __getattr__(self, name):
	def _int(val):
	try:
	return int(val)
	except ValueError:
	return False

	if not name.startswith('_') or not _int(name[1:]):
	raise AttributeError("'tuple' object has no attribute '%s'" % name)

	# first install pygmentize to the mac OS X or macOS system with the built-in python
	sudo easy_install Pygments

	# then add alias to your ~/.bash_profile or ~/.bashrc or ~/.zshrc etc.
	alias pcat='pygmentize -f terminal256 -O style=native -g'

	# 1. Put this file to /etc/pf.conf
	# 2. Install init boot scripts using IceFloor then - http://www.hanynet.com/icefloor/
	# I tried to use IceFloor to configure everything but it didn't work very well.
	# 3. Once done, you can confirm the rules were loaded with 'sudo pfctl -sr'
	# 4. At System Preferences -> Security -> Firewall -> Firewall Options,
	# check 'Block all incoming connections' to prevent annoying per-app dialogs.

	set skip on lo0
	set block-policy drop