dherman

(function(Fp, Ap) {
    var applyMethod = Fp.apply,
        bindMethod = Fp.bind,
        callMethod = Fp.call;

    var sliceMethod = Ap.slice,
        concatMethod = Ap.concat;

    var apply = callMethod.bind(applyMethod),
        bind = callMethod.bind(bindMethod),

dherman

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.

dherman

function isIndex(n) {
  // This isn't right, but pretend that this checks if n is an index in the
  // way that SpiderMonkey checks in js_IdIsIndex.
  return Number(n) % 1 == 0;
}

function indices(obj) {
  var result = [];
  for (var i = 0; i < obj.length; i++)
    result.push(i);

dherman

#!/bin/sh

find . -name '*.tbl' -or -name '*.c' -or -name '*.cpp' -or -name '*.h' | xargs wc -l | fgrep total | awk '{total = total + $1}END{print total}'

dherman

// ---------------------------------------------------------------------
// 1. UNCONTROVERSIAL AMONGST TC39
// ---------------------------------------------------------------------

// read before write throws
{
    console.log(x); // throws
    let x = 12;
    console.log(x);
}

dherman

// This type-checks and compiles.

function Thing(arg : string) { }

var obj = new Thing("");

if (true) {
    obj.x = 3;
}

dherman

Installing rb-fsevent (0.4.3.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/dherman/.rbenv/versions/1.9.3-p194/bin/ruby extconf.rb 
creating Makefile
extconf.rb:21:in `<main>': Only Darwin systems greater than 8 (Mac OS X 10.5+) are supported (RuntimeError)


Gem files will remain installed in /Users/dherman/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rb-fsevent-0.4.3.1 for inspection.
Results logged to /Users/dherman/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rb-fsevent-0.4.3.1/ext/gem_make.out

dherman

# Workaround to make Rubygems believe it builds a native gem
require 'mkmf'
create_makefile('none')

# TODO: determine whether we really need to be working around instead of with mkmf

if `uname -s`.chomp != 'Darwin'
  puts "Warning! Only Darwin (Mac OS X) systems are supported, nothing will be compiled"
else
  begin

dherman

Davids-MacBook-Air-2:calculist dherman$ rbenv version
1.9.3-p194 (set by /Users/dherman/Sources/calculist/.rbenv-version)
Davids-MacBook-Air-2:calculist dherman$ which ruby
/Users/dherman/.rbenv/shims/ruby
Davids-MacBook-Air-2:calculist dherman$ ruby --version
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.2.0]
Davids-MacBook-Air-2:calculist dherman$ which gem
/Users/dherman/.rbenv/shims/gem
Davids-MacBook-Air-2:calculist dherman$ gem install bundler
Fetching: bundler-1.2.1.gem (100%)b

dherman

source "http://rubygems.org"

group :development do
  gem 'rake'
  gem 'rack'
  gem 'jekyll'
  gem 'rdiscount'
  gem 'pygments.rb'
  gem 'RedCloth'
  gem 'haml', '>= 3.1'