qzchenwl

macOS is a Unix, and not built on Linux.

I think most of us realize that macOS isn't a Linux OS, but what that also means is that instead of shipping with the GNU flavor of command line tools, it ships with the FreeBSD flavor. As such, writing shell scripts which can work across both platforms can sometimes be challenging.

Homebrew

Homebrew can be used to install the GNU versions of tools onto your Mac, but they are all prefixed with "g" by default.

All commands have been installed with the prefix "g". If you need to use these commands with their normal names, you can add a "gnubin" directory to your PATH from your bashrc.

qzchenwl

# see https://www.topbug.net/blog/2013/04/14/install-and-use-gnu-command-line-tools-in-mac-os-x/

# core
brew install coreutils

# key commands
brew install binutils
brew install diffutils
brew install ed --default-names
brew install findutils --with-default-names

qzchenwl

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

qzchenwl

{-# LANGUAGE BangPatterns #-}
module Main (fib1, fib2, fib3, fib4, main) where
import Control.Monad
import Control.Monad.ST
import Data.STRef
import Data.List (transpose)
import Criterion.Main

fib1 :: Int -> Integer
fib1 n = fst $ fib' n

qzchenwl

{-# LANGUAGE BangPatterns, ViewPatterns #-}
import System.Environment (getArgs)
import Control.Monad
import Control.Monad.ST
import Data.STRef
import GHC.Int

fib1 :: Int -> Integer
fib1 n = fibs !! n
  where fibs = 1 : 1 : zipWith (+) fibs (tail fibs)