ghosty141

original url - https://www.facebook.com/notes/daniel-colascione/buttery-smooth-emacs/10155313440066102/

Buttery Smooth Emacs

30 October 2016

Public Emacs has flickered for 30 years. Now, it should be flicker-free. I’ve just landed support for double-buffered rendering for the X11 port. Now you should be able to edit, resize, and introduce bugs in your awful codebase without seeing a partially-rendered buffer or being incited to murder by barely-perceptible white flashes while editing that

stufield

From: https://stackoverflow.com/questions/7983204/having-a-private-branch-of-a-public-repo-on-github

• Mirror your repo
  • Create a bare clone of the repository

  git clone --bare https://github.com/user/old-repository.git

  • Mirror-push to the new repository (must already in the remote! Create one up front!)

9999years

#lang r5rs
(#%require schemeunit)

(define ** expt)
(define (!= x y) (not (= x y)))
(define (^^ a b) (or (and a (not b))
                      (and b (not a))))
; can you believe they made && and || special forms???
(define (&& a b) (and a b))
(define (|| a b) (or a b))

xydinesh

HANDY ONE-LINERS FOR SED (Unix stream editor) Oct. 29, 1997 
compiled by Eric Pement <epement@jpusa.chi.il.us> version 4.3 
Latest version of this file is always at <http://www.wollery.demon.co.uk>
FILE SPACING:

# double space a file 
sed G

# triple space a file 
sed 'G;G'

lukechampine

#include <stdio.h>
#include <stdbool.h>

// Maybe

typedef struct MaybeInt {
    int  just;
    bool nothing;
} MaybeInt;

fabiomontefuscolo

XZ

1. Compress a file (filename.sql will be replaced by filename.sql.xz)

xz filename.sql

2. Uncompress file (filename.sql.xz will be replaced by filename.sql)

lukechampine

The Y Combinator

The Y Combinator is a classic lambda calculus construct that many people find baffling. Here's my attempt to explain it as clearly as possible (no promises!). Familiarity with Haskell syntax is assumed.

The problem we're trying to solve is how to write an anonymous function (a "lambda") that is recursive. Normally, if you want to write a recursive function, it looks like this:

fac n = if n == 0 then 1
        else n * fac (n-1)

ramntry

import Control.Monad.State
import qualified Data.Map as Map

recall :: Ord a => a -> State (Map.Map a r) (Maybe r)
recall n = do
  memory <- get
  return (Map.lookup n memory)

memorize :: Ord a => a -> r -> State (Map.Map a r) ()
memorize n result = do

ericavonb

Git Commit Style Guide

Inspiration: Deis Commit Style Guide

I often quote Deis in sections below.

Motivation

It makes going back and reading commits easier. It also allows you to spend less time thinking about what your commit message should be.

shreeshga

HANDY ONE-LINERS FOR SED (Unix stream editor) Oct. 29, 1997 
compiled by Eric Pement <epement@jpusa.chi.il.us> version 4.3 
Latest version of this file is always at <http://www.wollery.demon.co.uk>
FILE SPACING:

# double space a file 
sed G

# triple space a file 
sed 'G;G'