Tom Bush tomfbush

In penance for cracking stupid jokes on Twitter, here's my Emacs cheat sheet. Emacs has a steep learning curve, so I've tried to order them by importance so you could learn them in stages.

One overall rule of thumb: pay attention to the minibuffer (the line at the bottom of the editor). It will often guide you through a process, and also gives you hints about what state you're in, such as the middle of a multi-chord sequence.

The other rule of thumb: when in doubt, C-g it out.

Basics (mandatory)

You simply can't get by without having these at your fingertips.

	# function to substitute matching string and everything after it with nothing
	# note leading space if that applies to your dataset
	removeCrap <- function(crapThing) {
	gsub(" (0\|[1-9][0-9])\ ?(GB).$", "", crapThing)
	}

	# load data from csv into a dataframe
	d <- read.csv("input.csv", sep = ",")

	# display a few rows of the dataframe 'd'

	#!/usr/bin/env python
	# -- coding: utf-8 --

	"""
	Remove output from existing Jupyter Notebooks.
	Modified from remove_output by Minrk, damianavila, gabraganca.

	References:
	[0]: https://github.com/jupyter/nbformat
	[1]: http://nbformat.readthedocs.org/en/latest/index.html

	using System;
	using System.IO;
	using System.Collections;
	using System.Collections.Generic;
	using System.Globalization;
	using System.Security.Cryptography;
	using System.Linq;
	using System.Text.RegularExpressions;
	using System.Net;
	using System.Web;

	# coding=utf-8
	#
	#!/usr/bin/python
	#
	# Copyright 2013 Johannes Bauer, Universitaet Hamburg
	#
	# This file is free software. Do with it whatever you like.
	# It comes with no warranty, explicit or implicit, whatsoever.
	#
	# This python script implements an early version of Itti and Koch's

	# via https://stackoverflow.com/a/16957078/4421532

	grep -rnw '/path/to/somewhere/' -e 'pattern'