tessi

class ByteArray
  include Enumerable

  def initialize(n)
    @size = n
    @char_count = (n / 8.0).ceil
    @store = String.new("\0" * @char_count, encoding: "ASCII-8BIT")
  end

  def [](n)

tessi

Keybase proof

I hereby claim:

• I am tessi on github.
• I am tessi (https://keybase.io/tessi) on keybase.
• I have a public key ASCnhquaMtRQU8NfCVTGIGGkMe3JQBNsbSU26FjGtgJXlQo

To claim this, I am signing this object:

tessi

Upgrade Postgresql from 9.2 to 9.6 on an uberspace

Uberspace (an awesome german web hoster) has superb postgresql support, except that it currently only offers postgresql versions 9.2.x and 9.3.x. I run postgresql 9.6.2 on my uberspace and documented steps for a migration to postgresql 9.6 here.

My goal was to be as close to the original uberspace-postgresql-setup as possible, but I had to copy and modify some uberspace scripts so they correctly use the new postgresql version.

Warning: Here be dragons. This is what I did -- that doesn't mean you should do the same or what I did was clever. Always backup your data and maybe test on a throw-away uberspace first. If you find things to improve, let me know and I'll try to keep this updated.

What I assume you have

tessi

#!/bin/sh
set -e
echo "this script installs openproject"
echo "things might take a while, please be patient"
echo ""


echo "setup environment..."
echo "gem: --user-install --no-rdoc --no-ri" > ~/.gemrc

tessi

How to install OpenProject on uberspace.de

Follow those steps to install OpenProject on a fresh uberspace.

Step 1: Install dependencies

First we set-up all dependencies. We use ruby 2.1.2 and install gems in a user directory:

echo "gem: --user-install --no-rdoc --no-ri" > ~/.gemrc

cat <<'EOF' >> ~/.bash_profile

tessi

Keybase proof

I hereby claim:

• I am tessi on github.
• I am tessi (https://keybase.io/tessi) on keybase.
• I have a public key whose fingerprint is A948 40E0 C745 A694 C9F2 C221 E01F 12D7 8B9B 048D

To claim this, I am signing this object:

tessi

Jumping, Finding, ...

Keybinding	-	Description
Ctrl-1	-	Move to 1st tab (work every number)
Ctrl-p	-	Go to anything
Ctrl-g	-	Go to line
Ctrl-r	-	Go to symbol (e.g. section and labels)
Ctrl-m	-	Move to bracket

tessi

[alias]
lg = log -G --pager always --color always --template '\033[0;31m{node|short} \033[0;34m({author|person}) - \033[0;33m{tags} {bookmarks} {branches} \033[0m{desc|firstline|strip} \033[0;32m({date|age})\033[0m\n'
show = log -pr
chp = graft
shortlog = !hg log --template "{author|person}\n" | sort | uniq -c | sort -nr

tessi

require 'benchmark'
iterations = 10_000
arr = Array.new(1000) { Array.new(2) << (rand()*100).to_s}
 
def use_map_join(arr)
  arr.map {|a| a[2]}.join ', '
end
 
def use_inject(arr)
  join_str = ', '

tessi

ruby --version
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]

ruby bench.rb         
       user     system      total        real
babai1  1.700000   0.000000   1.700000 (  1.707292)
babai2 29.630000   0.010000  29.640000 ( 29.769966)