sindresorhus

extension Sequence where Element: ExpressibleByIntegerLiteral  {
	private func abstractAverage<T>(sum: (T, T) -> T, div: (T, T) -> T) -> T where Element == T  {
		var i: T = 0
		var total: T = 0

		for value in self {
			total = sum(total, value)
			i = sum(i, 1)
		}

sindresorhus

public protocol Dividable {
    static func / (lhs: Self, rhs: Self) -> Self
}

extension Int : Dividable {}
extension Double : Dividable {}

extension Sequence where Element : Numeric & Dividable {
    func average() -> Element {
        var i: Element = 0

sindresorhus

How to write your Markdown in Sublime Text 2 and preview in Mou

I use Sublime for everything text related, but it doesn't have any built-in way to preview my Markdown files.

This is how easy it is to preview in Mou:

• In Sublime, go to Tools -> Build System -> New Build System...
• In the newly opened file, replace the file contents with this and save: { "osx": {

sindresorhus

Never ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever ever eve

sindresorhus

/// Types that can be initialized without any parameters
protocol EmptyInitializable {
	init()
}

extension Int: EmptyInitializable {}
extension Int8: EmptyInitializable {}
extension Int16: EmptyInitializable {}
extension Int32: EmptyInitializable {}
extension Int64: EmptyInitializable {}

sindresorhus

The following npm packages are just stolen from mine:

https://gitlab.com/yoginth/is-flag Code from: https://github.com/sindresorhus/has-flag

https://gitlab.com/yoginth/prfy Code from: https://github.com/sindresorhus/pify

https://gitlab.com/yoginth/mimic-func Code from: https://github.com/sindresorhus/mimic-fn

sindresorhus

Keybase proof

I hereby claim:

• I am sindresorhus on github.
• I am sindresorhus (https://keybase.io/sindresorhus) on keybase.
• I have a public key whose fingerprint is 9167 E91F 3DA4 65D0 020A 48B3 5A35 FFDB 8B07 983A

To claim this, I am signing this object:

sindresorhus

{
	"requireCurlyBraces": ["if", "else", "for", "while", "do", "try", "catch"],
	"requireSpaceAfterKeywords": ["if", "else", "for", "while", "do", "switch", "return", "try", "catch", "function"],
	"requireSpacesInFunctionExpression": {
		"beforeOpeningCurlyBrace": true
	},
	"disallowMultipleVarDecl": true,
	"disallowSpacesInsideObjectBrackets": true,
	"disallowSpacesInsideArrayBrackets": true,
	"disallowSpacesInsideParentheses": true,

sindresorhus

libdispatch efficiency tips

I suspect most developers are using the libdispatch inefficiently due to the way it was presented to us at the time it was introduced and for many years after that, and due to the confusing documentation and API. I realized this after reading the 'concurrency' discussion on the swift-evolution mailing-list, in particular the messages from Pierre Habouzit (who is the libdispatch maintainer at Apple) are quite enlightening (and you can also find many tweets from him on the subject).

• https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170828/date.html
• https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170904/date.html

My take-aways are:

• You should have very few queues that target the global pool. If all these queues are active at once, you will get as many threads running. These queues should be seen as execution contexts in the program (gui, storage, background work, ...) that benefit from executing in parallel.

sindresorhus

import AppKit
 
func getPath(app: String) -> String? {
	let workspace = NSWorkspace.sharedWorkspace()
 
	if app.rangeOfString(".") != nil {
		return workspace.absolutePathForAppBundleWithIdentifier(app)
	} else {
		return workspace.fullPathForApplication(app)
	}