giannisp

After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install [email protected]
brew unlink [email protected]
brew link postgresql

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

malyn

diff --git a/plugin/fireplace.vim b/plugin/fireplace.vim
index 6c32caa..a415bf8 100644
--- a/plugin/fireplace.vim
+++ b/plugin/fireplace.vim
@@ -232,7 +232,9 @@ function! s:repl.piggieback(arg, ...) abort
   else
     let arg = ' :repl-env ' . a:arg
   endif
-  let response = connection.eval('(cemerick.piggieback/cljs-repl'.arg.')')
+  "let response = connection.eval('(cemerick.piggieback/cljs-repl'.arg.')')

JunichiIto

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

schfkt

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

s-mage

#!/usr/bin/env ruby

require 'flickraw'
require 'json'

CREATE_API_KEY = 'https://secure.flickr.com/services/apps/create/apply'
CONFIG_FILE = File.expand_path '~/.config/2flickr.json'


def init

henrik

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

happyrobots

# Mac
IO.popen('pbcopy', 'r+') { |clipboard| clipboard.puts html_out }

# Linux
IO.popen(’xsel –clipboard –input’, ‘r+’) { |clipboard| clipboard.puts html_out }

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

rubyworks

# Work with Roman numerals just like normal Integers.
class RomanNumeral < Numeric
  include Comparable

  # The largest integer representable as a roman
  # numerable by this module.
  MAX = 3999

  # Taken from O'Reilly's Perl Cookbook 6.23. Regular Expression Grabbag.
  REGEXP = /^M*(D?C{0,3}|C[DM])(L?X{0,3}|X[LC])(V?I{0,3}|I[VX])$/i