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@posener
posener / go-shebang-story.md
Last active April 24, 2025 16:41
Story: Writing Scripts with Go

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

@Avaq
Avaq / combinators.js
Last active March 18, 2025 22:17
Common combinators in JavaScript
const I = x => x
const K = x => y => x
const A = f => x => f (x)
const T = x => f => f (x)
const W = f => x => f (x) (x)
const C = f => y => x => f (x) (y)
const B = f => g => x => f (g (x))
const S = f => g => x => f (x) (g (x))
const S_ = f => g => x => f (g (x)) (x)
const S2 = f => g => h => x => f (g (x)) (h (x))
@kosmikus
kosmikus / TinyServant.hs
Created November 1, 2015 20:30
Implementation of a small Servant-like DSL
{-# LANGUAGE DataKinds, PolyKinds, TypeOperators #-}
{-# LANGUAGE TypeFamilies, FlexibleInstances, ScopedTypeVariables #-}
{-# LANGUAGE InstanceSigs #-}
module TinyServant where
import Control.Applicative
import GHC.TypeLits
import Text.Read
import Data.Time
@jboner
jboner / latency.txt
Last active April 23, 2025 18:02
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@utaal
utaal / Makefile
Created September 5, 2011 16:42
webserver using libuv
webserver: webserver.c libuv/uv.a http-parser/http_parser.o
gcc -I libuv/include \
-lrt -lm -lpthread -o \
webserver webserver.c \
libuv/uv.a http-parser/http_parser.o
libuv/uv.a:
$(MAKE) -C libuv
http-parser/http_parser.o: