Pokai Chang zetavg

用 Haskell 的 list comprehension 來解某數學愛好者社團的某題目。

執行結果

$ ghc -o solution solution.hs && ./solution
[[D,A,D,B,B,D,C,C,D,C]]

直書書籍用 Calibre 轉 `azw3` 在 Kindle 上跑版的解決方法

圖為修正後範例。

有些直書書籍轉成 azw3 後排版會跑掉，在 Kindle 上僅剩翻頁變相反、從左到右的（因為原本是直書呀）。這裡是一些解決方法。

首先對要修正的書按右鍵選編輯，然後選 AZW3。

	function copyUberEatsMenuItems() {
	const items = getUberEatsMenuItems()
	copy(
	items
	.map(i => `${i.name}\t${i.price}`)
	.join('\n')
	)
	}

	function getUberEatsMenuItems() {

	Error: The application encountered the following error: uninitialized constant Bundler::Settings (NameError)
	/nix/store/li2vmpp6mxqzrs6s95szj1xga380hsv4-sample-rails-app-dev-bundler-env/lib/ruby/gems/2.5.0/gems/bundler-1.17.3/lib/bundler/settings.rb:6:in `<module:Bundler>'
	/nix/store/li2vmpp6mxqzrs6s95szj1xga380hsv4-sample-rails-app-dev-bundler-env/lib/ruby/gems/2.5.0/gems/bundler-1.17.3/lib/bundler/settings.rb:5:in `<top (required)>'
	/nix/store/928i2cf1wizgm7dapmnk0m8ijrsjdj43-ruby-2.5.7/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:72:in `require'
	/nix/store/928i2cf1wizgm7dapmnk0m8ijrsjdj43-ruby-2.5.7/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:72:in `require'
	/nix/store/li2vmpp6mxqzrs6s95szj1xga380hsv4-sample-rails-app-dev-bundler-env/lib/ruby/gems/2.5.0/gems/bundler-1.17.3/lib/bundler.rb:273:in `settings'
	/nix/store/li2vmpp6mxqzrs6s95szj1xga380hsv4-sample-rails-app-dev-bundler-env/lib/ruby/gems/2.5.0/gems/bundler-1.17.3/lib/bundler.rb:84:in `configured_bundle_path'

	/**
	* telegraf-keyboard-bot
	*
	* Function to execute: handleRequest
	*
	* Required environment variables:
	*
	* - TELEGRAM_BOT_AUTHENTICATION_TOKEN
	*
	* Run


	const citizenQuartzMultiAlarmIIIMachine = Machine({
	id: 'citizen-quartz-multi-alarm-iii',
	initial: 'displays',
	states: {
	'displays': {
	initial: 'time',
	states: {
	'time': {
	on: {

	################### APM Server Configuration #########################

	############################# APM Server ######################################

	apm-server:
	# Defines the host and port the server is listening on. use "unix:/path/to.sock" to listen on a unix domain socket.
	host: "localhost:8200"

	# Maximum permitted size in bytes of a request's header accepted by the server to be processed.
	#max_header_size: 1048576

	function useCallback(callback) {
	const callbackRef = React.useRef(callback)
	callbackRef.current = callback
	const wrappedCallback = React.useMemo(
	() => (...args) => callbackRef.current(...args),
	[],
	)
	return wrappedCallback
	}