Marius Butuc mariusbutuc

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10 Lessons from a Decade with Erlang [↗][source]

Higher-order Constructs

Use higher-order constructs (libraries, frameworks, tools) instead of building everything from scratch. If there is no higher-order construct yet, build one.
Opaque Data Structures

Use Opaque Data Structures to represent your entities.

	// Copyright (c) 2012 Sutoiku, Inc. (MIT License)

	function PV(rate, periods, payment, future, type) {
	// Initialize type
	var type = (typeof type === 'undefined') ? 0 : type;

	// Evaluate rate and periods (TODO: replace with secure expression evaluator)
	rate = eval(rate);
	periods = eval(periods);

	# .git/hooks/pre-push
	#!/usr/bin/env bash

	set -e
	trap 'echo interrupted; exit' INT

	cd $(git rev-parse --show-toplevel)

	if [ -f "mix.exs" ]; then
	mix compile --warnings-as-errors

	# p_map is a parallel map which runs each and every process concurrently
	> p_map = fn -> 1..5 \|> Enum.map(fn(i) -> Task.async(fn -> :timer.sleep(200); i + 1 end) end) \|> Enum.map(fn(tsk) -> Task.await(tsk) end) end

	# slow_map runs each and every iteration one after the other
	> slow_map = fn -> 1..5 \|> Enum.map(fn(i) -> :timer.sleep(200); i + 1 end) end

	> :timer.tc(fn -> p_map.() end, [])
	{200830, [2, 3, 4, 5, 6]}

	> :timer.tc(fn -> slow_map.() end, [])

	** (CompileError) lib/spreadsheet/functions.ex:340: definitions with multiple clauses and default values require a header. Instead of:

	def foo(:first_clause, b \\ :default) do ... end
	def foo(:second_clause, b) do ... end

	one should write:

	def foo(a, b \\ :default)
	def foo(:first_clause, b) do ... end
	def foo(:second_clause, b) do ... end

	/**
	* @OnlyCurrentDoc Limits the script to only accessing the current spreadsheet.
	*/


	/**
	* Adds a custom menu with items to show the sidebar and dialog.
	*
	* @param {Object} e The event parameter for a simple onOpen trigger.
	*/

	// swap the keybindings for paste and paste_and_indent
	{ "keys": ["super+v"], "command": "paste_and_indent" },
	{ "keys": ["super+shift+v"], "command": "paste" }

	[T]he difference between a bad programmer and a
	good one is whether he considers his code or his
	data structures more important. Bad programmers
	worry about the code. Good programmers worry about
	data structures and their relationships.
	-- Linus Torvalds
	~~~
	Clarity and brevity sometimes are at odds.
	When they are, I choose clarity.
	-- Jacob Kaplan-Moss